Vaclav Kotesovec
fairy
chess
composer
and
programmer



News:
  • Variantim - issue 93/2024 - solutions (added 6.12.2024)
  • SK 170/2024 - originals - from A. Selivanov's website (added 6.12.2024)
  • Problemist of Ukraine - originals from issue 82 (added 5.12.2024)
  • WCCI 2022-2024 - announcement, C 20.1.2025 (added 1.12.2024)
  • The Problemist Supplement - issue 193, November 2024 (added 4.11.2024)
  • The Hopper Magazine - Chess Magazine from Singapore, issue 7 (added 4.11.2024)
  • Quartz - issue 60 (added 17.10.2024)
  • Sachmatija - originals 3/2024 (5414 Masand is missing, 5430 circe malefique is missing) (added 11.10.2024)
  • Problem Paradise - Japanese Chess Problem Magazine, issue 107/2024 (added 10.10.2024)
  • Best problems - issue 112/2024 (added 1.10.2024)
  • SEPA Problemas - issue 48/2024 (added 1.10.2024)
  • Pat a Mat - originals from issue 129 (added 12.9.2024)
  • Wenigsteiner-JahresPreis 2023 - award (added 14.8.2024)
  • 66th World Congress of Chess Composition - Jurmala, Latvia, 27.7. – 3.8.2024, Highlights & Decisions (updated 18.8.2024)
  • Current list of FIDE Album points (including 2019-21) - from WFCC website (added 28.5.2024)
    Backup of old news

    Electronic magazines:
  • ANDA Fairy Planet - by Petko A. Petkov
  • Bulletin.ChessProblems.ca
  • Sachmatija
  • Best problems
  • Variantim
  • Problemist of Ukraine - originals
  • SuperProblem
  • Gaudium
  • mpk-Blätter
  • Conflictio - by Juraj Lörinc
  • Quartz
  • Problem Paradise - also archive
  • The Hopper Magazine
  • SEPA
  • harmonie-aktiv, archive
  • Troll - Problemschach - by Udo Degener
  • Schweizerische Schachzeitung
  • Finales y Temas
  • Echiquier Belge
  • e4-e5
  • ChessStar
  • Problemkiste 210/2018 - from feenschach website

    Selection from new tournaments
  • The Calendar of Composing Tournaments - (link to WFCC website) (added 6.12.2023)
    Backup of old tournaments

    Frequently updated databases:
  • WinChloe - updated table "Echecs" - total 942164 problems in database (updated 12.11.2024). Christian Poisson provides every the twelfth day of the month a new update, and has been doing it for 20 years with incredible regularity! And at the same time, I always test chess problems that are marked "C?" in this update. These are always 20-30 time-consuming problems, which are testable, but it was not possible to test inside WinChloe. So I always divide these problems into several files, selfmates in 9 -10 moves I test with Gustav, problems with fairy pieces with Alybadix and for orthodox sh=n, resp. h=n is fastest the program Popeye in intelligent mode. I will then send the test results back to him. I often find a lot of cooks, but I'm more happy with the ones that are correct and I can mark them "C+". According to the rate of increase, he could reach 1 million chess problems in 2026 !
  • PDB Server - 478921 problems in database (12.10.2024)
  • Yet another chess problem database - free database by Dmitri Turevski. Total 603694 problems (12.10.2024)
  • Brian Stephenson - Meson - Chess Problem Database. 253874 problems (12.10.2024)
  • albrecht-sammlung - by Udo Degener. Free database of 302506 twomovers (1.10.2024), pattern-search
  • Gerald Ettl - Problemschach+ - program PSP and database of 161895 problems (23.5.2024)
  • Eduardo Sadier - The Art of Direct Mate in Two - free database of more than 180000 twomovers (updated 5.12.2021)
  • Endgame Study Database VI - by Harold van der Heijden, 93839 endgames studies, more info (updated 29.11.2020)

    Cooks and corrections in the FIDE Albums:
  • FIDE Albums 1914-2000 error list - by Ilkka Blom (last updated in 2010, cached copy)
  • FIDE Album 2001-2003 - Errata, see below for next cooks
  • 500 FIDE Album 1956-1958 - Karpati h=14 (found by Vaclav Kotesovec, added 14.7.2012)
  • 475 FIDE Album 1959-1961 - Rusek s#6 (found by Olaf Jenkner 2012)
  • 480 FIDE Album 1959-1961 - Pigits s#15 (found by Kari Karhunen 1997)
  • 615 FIDE Album 1968-1970 - Helledie s#12 (added 13.11.2024)
  • 630 FIDE Album 1977-1979 - Lopez sh=18 (found by Vaclav Kotesovec, added 21.8.2012)
  • 895 FIDE Album 1980-1982 - Courthiau s#16 circe (found by Paul Raican, added 13.5.2024)
  • 603 FIDE Album 1983-1985 - Caillaud s#17 (found by Bert Sendobry, added 29.10.2023)
  • F81 FIDE Album 1986-1988 - Janevski s#14 (found by Olaf Jenkner 2012)
  • F84 FIDE Album 1986-1988 - M.Tomasevic and R.Tomasevic s#40 (found by Olaf Jenkner 2018)
  • G30 FIDE Album 1986-1988 - Bo Lindgren ss#42 (found by Arnold Beine, added 30.10.2022)
  • G68 FIDE Album 1986-1988 - Wenda ss#17 (found by Vaclav Kotesovec, added 16.8.2020)
  • G2 FIDE Album 1989-1991 - Sphicas s=80 (found by Olaf Jenkner, added 10.3.2013)
  • G38 FIDE Album 1989-1991 - Bo Lindgren ss#34 (found by Paul Raican, added 14.8.2022)
  • F86 FIDE Album 1992-1994 - Azhusin s#33 (found by Olaf Jenkner 2018)
  • F59 FIDE Album 1995-1997 - Petkov s#5, illegal position (found by Raúl Jordan, added 9.12.2020)
  • F85 FIDE Album 1995-1997 - Hoffmann s#16 (found by Olaf Jenkner, added 21.8.2012)
  • F185 FIDE Album 2001-2003 - Werner s#10 (found by Vaclav Kotesovec, added 8.10.2019)
  • F195 FIDE Album 2001-2003 - Stoychev s#29 (found by Anton Baumann, added 20.4.2020)
  • G6 FIDE Album 2001-2003 - Bo Lindgren hs#7 (found by Vaclav Kotesovec, added 28.8.2021)
  • G67 FIDE Album 2001-2003 - Wenda s#8 (found by Vaclav Kotesovec, added 21.12.2020)
  • F222 FIDE Album 2004-2006 - Azhusin s#12 (found by Olaf Jenkner 2010)
  • F240 FIDE Album 2004-2006 - Müller and Bachman s#26 (found by Olaf Jenkner 2009)
  • F213 FIDE Album 2007-2009 - Richter s#13 (found by Anton Baumann 2020)
  • F216 FIDE Album 2007-2009 - Marandyuk s#14 (found by Anton Baumann 2017)
  • G181 FIDE Album 2007-2009 - Wenda h=4, (found by Vaclav Kotesovec, added 7.8.2020)
  • C140 FIDE Album 2010-2012 - Munz #17 (found by Michael Herzberg, added 23.11.2022)
  • F180 FIDE Album 2010-2012 - Richter and Lossin s#17 (more versions, found by Olaf Jenkner 2012-16)
  • F186 FIDE Album 2010-2012 - Fomichev and Werner s#21 (found by Olaf Jenkner 2017)
  • G314 FIDE Album 2016-2018 - Unto Heinonen ss#11 (found by Vaclav Kotesovec, added 15.12.2021)

  • G137 FIDE Album 1986-1988 - Kerhuel ss#21, published with an error wQf8, right: wGf8 (added 13.4.2023)

    New fantastic results, C+ :
  • 632 FIDE Album 1977-1979 - Morse sh#44, C+ (Gustav 4.2e, added 18.9.2023)
  • G26 FIDE Album 1986-1988 - Sphicas sh#40, C+ (Alybadix, Gustav 4.2a)
  • G14 FIDE Album 2004-2006 - Sphicas ss#30, C+ (Gustav 4.2a)
  • FIDE Album 2019-2021 - Heinonen ss#47, C+ (Gustav 4.2a)
  • PDB P1298933 - Henneberger sh=20, C+ (Popeye, option intelligent, 529:10:00 h:m:s, added 3.6.2024)

    Surprising cooks in frequently reproduced problems (not in FIDE Albums):
  • P1292208 - Atanasijevic ss#33 (added 25.9.2023)

    I recommend following pages:
  • Curious stalemates in PlatzWechselCirce - V. Kotesovec, Anda Fairy Planet 5/2023, p.3-4 (added 4.6.2023)
  • Records in ser-#=PWC problems with one white piece - V. Kotesovec, Bulletin ChessProblems.ca 18/2020, p. 876-884 (added 1.7.2020)
  • FIDE Album Index 1914-2018 - by Hannu Harkola (added 8.11.2022)
  • Julia’s Fairies - articles, originals and much more by Julia Vysotska from Latvia
  • The Fairy Chess Review 1930-1951 and The Problemist 1926-2023 - free available on the official BCPS site! Great work! (added 2.1.2018)
  • The Problemist Supplement - complete archive of PDF since 1992 (total more than 1194 pages)
  • ChessProblems.ca - ChessProblems.ca Bulletin by Cornel Pacurar (devoted mainly to Series-Movers)
  • WFCC - World Federation for Chess Composition (former PCCC)
  • Composers Names In Various Alphabets - by Thomas Maeder (migrated 14.10.2022)
  • Wenigsteiner-JahresPreis, Ranking: 1979-2023
  • Chess problems columns in Slovakia - excellent collection of more than 18000 columns by Ivan Jarolin
  • Chess Problemist (broken link) - Android version of the solving engine of the WinChloe by Christian Poisson. I tested it, great program. Tested version 1.1.7. (updated 9.2.2018)
  • Chess Composers - (whose birthday is it today?) blog by Eric Huber and Vlaicu Crisan
  • Ural problemist - A. Selivanov
  • Sachmatnaja kompozicija - originals: 170, 169, 168, 167, 166, 165, 164, 162, 161, 160, 159, 158, 157, 156, 155, 154, 153, 152, 151, 150, 149, 148
  • KoBulChess - bulgarian website (in English) by Diyan Kostadinov. Last available on web.archive.org from 31.1.2023.
  • MatPlus Forum
  • Handbook of Chess Composition, 8th edition
  • WCCI 2019-2021 - results (added 30.8.2022)
  • WCCI 2016-2018 - results (added 19.6.2019)
  • WCCI 2013-2015 – results
  • Popeye - free program for solving
  • Py2Web - tool for dynamic diagrams in HTML
  • WinChloe - great improvements for multi-core systems
  • APwin (broken link) - shell for Alybadix (and now also for Popeye) by Paul H. Wiereyn. Last version APwin v2015-November. Available on web.archive.org from 10.4.2021
  • ChessComposer 5.1 - The first ever Chess composition app for smartphones (by Diyan Kostadinov and Dimitar Ivanov).
  • Helpmate Analyzer - website by Viktoras Paliulionis (chess OCR added!), more info.
  • The Problemist - editor of fairy section is Seetharaman Kalyan.
  • Die Schwalbe - German magazine. Archiv - issues 192 (2001) - 298 (2019) in PDF
  • feenschach - German magazine, originals from feenschach 236, 238, 246, 250 and 251
  • Kunstschach - Swiss Chess problem association, also problem and studies pages of Schweizerische Schachzeitung (complete 1900-2015 !) and Schweizerische Arbeiter-Schachzeitung. Magazine idee & form, archive of harmonie and harmonie-aktiv.
  • Probleemblad - Dutch magazine
  • Phénix - French magazine, 2019 issues 298, 299, 300 and 301-302 in PDF (with permission by Laurent Riguet), originals from Phénix 2009-2022, concours de démolitions - new idea: tournament for cooks!
  • Pat a Mat - Slovak magazine, issue 111 / 2020 was free.
  • StrateGems Archive - all issues 1-100 in PDF! Great! Thank you, Ryan! (added 5.10.2022, link moved 16.6.2024)
  • Thema Danicum - all issues 1976-2007.
  • Broodings 1-50 (PDF) - Chris Feather, 2001-2009. Files provided by Michael McDowell. (added 19.1.2018)
  • Obituaries of diagrammes 1973-2013 - by John Beasley (added 10.5.2013)
  • Componist - Romanian magazine, send originals to Dinu-Ioan Nicula
  • Eteroscacco - Italian magazine
  • Tehtäväniekka - Finnish magazine
  • Variant Chess - issues 1-64 in PDF, composite OCR file added 13.7.2013
  • British endgame study news - archive 1996-2010 by John Beasley, total 1012 pages
  • Losing Chess: 1.e3 e6 is a win for White ! - outstanding result by Mark Watkins, August 2014
  • EG on the ARVES website - study magazine EG 1-190 (1965-2012) and 196 (2014) (added 30.10.2016, updated 17.12.2020)
  • Syzygy endgame tablebases - testing of positions (or endgame studies!) up to 7 pieces
  • Shredder - Endspieldatenbank - online include 6-pieces endgames, total 1153 GB, superfast
  • FinalGen - new possibilities in tablebases with 7 or more pieces (2012)
  • Longest Series Tournaments - by Itamar Faybish
  • Chess problem community for Russian speaking people - website by Vladimir Tyapkin
  • Traektoria kraba 2016 - Vladimir Rey, Ukraine - Collection of ser-h#, ser-h=, solved by Popeye in intelligent mode (added 30.10.2016)
  • The Q27 Project - Great result by Thomas B. Preußer: Q(27) = 234907967154122528 (added 23.9.2016)
  • Promoted pieces in fairy problems - problem or not? - interesting article by Juraj Lörinc
  • Youtube-Kanal Mustermatt - in German (added 12.12.2022)
  • Fairy lessons - The archives of Alain Villeneuve's lessons (added 12.12.2022)
  • Two lectures by Peter Gvozdjak: Marianka 2012, Kobe 2012
  • Lectures from Marianka 2013 - by Michel Caillaud (recorded by Ivan Jarolin)
  • Lectures from Marianka 2013 - by Uri Avner (recorded by Ivan Jarolin)
  • Juraj Brabec: Memories of Ludo Lehen - video - lecture (from Marianka 2014)
  • Lectures from Marianka 2014 - 12 Lectures
  • Chess Compostition Festival Marianka - Slovakia, 2016
  • 60th World Congress of Chess Composition - Dresden, 5.-12.8.2017
  • 61st World Congress of Chess Composition - Ohrid, Macedonia, 1.9.–8.9.2018, Bulletin
  • 62nd World Congress of Chess Composition - Vilnius, Lithuania, 17.8.–24.8.2019
  • 63rd World Congress of Chess Composition - Rhodes, Greece, 16.-23.10.2021
  • 64th World Congress of Chess Composition - Fujairah, UAE, 12.-19.11.2022
  • 65th World Congress of Chess Composition - Batumi, Georgia, 2.9. - 9.9.2023, Decisions (added 10.10.2023)
  • Four new fairy conditions called 'Bolero' - by Petko A. Petkov, StrateGems 88/2019, p. 193-200 (added 27.9.2019)
  • Record for the longest helpmate, in an illegal position ? - joint work of several composers in progress (Olaf Jenkner created a special version of Gustav for testing)! See also P1372242 and P1372555. (added 1.2.2020, updated 11.2.2020)

    Miscellaneous awards:
  • Moscow tourney 2024 - fairies - from A. Selivanov's website (added 5.12.2024)
  • Julia’s Fairies - award JF-2022/I by Vlaicu Crişan (added 17.3.2024)
  • SuperProblem - award 2023 Fairies by Paul Raican (added 17.3.2024)
  • Rex Multiplex 40 JT (C 25.12.2022) - award (added 16.1.2024)
  • Unto Heinonen MT - award (added 6.12.2023)
  • Tadashi Wakashima 70 JT award - from Julia's Fairies website (added 5.11.2023)
  • Stefan Milewski 80 JT - award (added 18.10.2023)
  • Julia’s Fairies - award JF-2019/II by Petko Petkov (added 11.5.2023)
  • Menachem Witztum 70 - award (added 30.5.2023)
  • Munich Fairy Chess Tournament 2022 - award (added 21.1.2023)
  • 10th FIDE World Cup in Composing 2022 - final results (added 5.10.2022)
  • SuperProblem 2022 - Fairies - preliminary award (from superproblem.ru) (added 1.2.2023)
  • Selivanov 55 JT - award (from Selivanov's website) (added 21.12.2022)
  • Ivunin 75 JT - award (from Selivanov's website) (added 5.10.2022)
  • Chumakov 80 JT - award (from Selivanov's website) (added 24.9.2022)
  • Stepochkin 60 JT - award (from superproblem.ru website) (added 24.9.2022)
  • Awards of miscellaneous Hungarian tourneys - (including Érsek 80 JT) collected by B. Majoros (added 10.9.2022)
  • Vladimir Zheltonozhko 80 MT - selfmates section (from Selivanov's website)  (added 10.9.2022)
  • RIFACE 2022 retro - award - from Alain Brobecker's website (added 22.6.2022, updated 3.7.2022)
  • Vasil Dyachuk 50 JT - preliminary awards (added 23.6.2022)
  • Julia’s Fairies 2020/II - award by Hans Gruber (added 13.6.2022)
  • SK 2021 fairies - award - from Selivanov's website (added 6.6.2022)
  • Bjorn Enemark 80 JT - award (added 8.5.2022)
  • Julia’s Fairies 2021/I - award (added 7.1.2022)
  • Julia’s Fairies 2021/II - award (added 7.1.2022)
  • Danka Petkova 100 MT - award with a comment by Petko Petkov (added 31.12.2021)
  • Azhusin 70 JT award (No.59 is cooked!) (added 8.12.2021, updated 19.12.2021)
  • Tallec MT - award (by A. Onkoud)  (added 16.7.2021)
  • Leonid Kubbel 130 MT - selfmates award (from Selivanov's website)  (added 16.7.2021)
  • Wenigsteiner-JahresPreis 2020 - award (added 8.6.2021)
  • SK 2020 fairies - award (added 21.3.2021)
  • SuperProblem.ru - Smotrov 50 JT, final award (cooked selfmates removed) (added 8.7.2020)
  • Michail Mishko MT - final results - sections s#, h#, hs#. In the previous version from April 2020 was incorrectly marked in section S#N (N>10) several very long selfmates as "C+". This is a new, corrected version! See pages 46-48 for detail info about testing. One example: s#24. (added 25.6.2020, updated 26.6.2020)
  • SK 2018 fairies - award (added 29.5.2020)
  • Julia's fairies 2019/I - award (added 19.11.2019)
  • Gravura 2019 - problems with 8-10 pieces, awards (added 6.11.2019)
  • 7th FIDE World Cup in Composing 2019 - awards (added 3.6.2019)
  • Award of Julia’s Fairies 10/2017-03/2018 - by N.Shankar Ram (added 5.2.2019)
  • Zoran Gavrilovski 50 JT - awards (added 1.1.2019)
  • Award Julia’s Fairies 2016/I - by Petko Petkov (added 22.12.2018)
  • FIDE Olympic Tourney 2018 - Awards (added 1.12.2018)
  • Tehtäväniekka - some new awards 2012-2013 and 2015-2016, Janne Syväniemi 50 JT award. (added 19.11.2018)
  • Czechoslovakia 100 (1918-2018) - awards, the symbolic and ornamental problems (added 28.10.2018)
  • RIFACE 2018 - French problem meeting, awards (added 22.6.2018)
  • Dinu-Ioan Nicula - 50 - Belgrade Internet Tourney 2018, award (added 15.7.2018)
  • Klaus Wenda 75 JT - from Die Schwalbe website (added 2.5.2018)
  • 5th FIDE World Cup in Composing 2017 - Results: G-Fairies (updated 18.5.2017)
  • Selivanov 50 JT - award - (added 12.11.2017)
  • Jozef Taraba – 70 MT - preliminary award (added 17.12.2017)
  • Suomen Tehtäväniekat - Harri Hurme 70 JT, Raimo Sailas 70 JT awards (added 7.12.2017)
  • superproblem.ru - Final Award in Quick Composing TT-196 (change of motivation) (added 19.10.2017)
  • Marianka Cup 2017 - awards (added 13.10.2017)
  • Julia’s Fairies-2015/I - award by Kostas Prentos (added 10.8.2017)
  • Marian Krizovensky – 55 JT - award (added 9.5.2017)
  • Petko Petkov 75 JT (PDF) - award (added 24.3.2017)
  • Julia’s Fairies-2016/II - award by Franz Pachl (added 7.3.2017)
  • RIFACE 2017 - award by Laurent Riguet and Jérôme Auclair (added 13.6.2017).
  • Phénix 2015 - Tanagras - award by Paul Raican (added 6.3.2017)
  • Blondel MT - awards
  • Gandev 70 JT (PDF) - award
  • Orbit 65 (PDF) - total 12 awards from 2011-2014
  • Peter Gvozdjak 50 JT - award
  • Longest Series Tournament - TT8 by Itamar Faybish - results, C 14.12.2016
  • Michael Grushko 60 JT (PDF) - award by judge Michael Grushko (C 31.5.2015, award published 20.12.2016)
  • Arnoldo Ellerman 120 MT - award: fairies (corrected version 17.1.2015)

    Tournaments:
  • Mini tournament (C 31.5.2011) - closed, winner Pavel Kamenik


    Best sites with addresses of chess magazines and current judges:
    Magazines, Tourneys (A.Selivanov)
    chess magazines (J.Golha)
    Chess Magazine (V.Rallo)
    Annonces de concours (Phenix website)

    Awards status of journals:
    Sachova skladba
    Sachove umeni
    Pat a Mat, originals and awards, Pat a Mat
    StrateGems
    Die Schwalbe
    harmonie
    Suomen Tehtäväniekat
    Ural Problemist
    Sachmatnaja kompozicija
    Schach
    Theme tourneys of Chess Composition Microweb
    Phénix
    feenschach
    Julia’s Fairies


    Articles by Vaclav Kotesovec

    published on my website
  • Series auto-stalemates with the Equistopper - with 20 originals (added 13.6.2024)
  • Stalemate problems of record length with Locust and PlatzWechselCirce - with 9 originals (added 15.6.2023)
  • The ending of king + queen against king in ABC chess (added 13.12.2022)
  • The helpmates and stalemates with n pieces of the same value - with 14 originals (added 15.4.2021)
  • Gustav 4, 128 GB RAM - results of testing of 288 selfmates in 10 moves - PDF (added 6.12.2019)
  • Madrasi and KöKo or KöKo and Madrasi ? - different programs do not produce the same results. (added 1.3.2018)
  • Development in programs for solving of chess problems - about 16 GB RAM and multi-core systems (added 20.5.2012, updated 30.5.2012)
  • William A. Shinkman, #20 - C+! - about W.A.Shinkman (American composer with Czech roots) (added 30.11.2010)
  • Magnified echo - PDF (added 26.9.2010)
  • New statistics of tested selfmates (more than 10 moves) - PDF (added 22.8.2010)
  • Final statistics for s#10 tested by program Gustav - PDF, with examples (added 21.11.2009)
  • Testing of long selfmates from the book by Valery Surkov - results of testing (added 26.10.2009)
  • GUSTAV - fastest program for orthodox selfmates and moremovers - all orthodox selfmates in 8 moves from WinChloe database now tested! (added 6.10.2009, updated 21.10.2009). Examples of tested selfmates - updated 28.6.2010, 5 cooks in 1. Prizes (long selfmates) found.
  • GUSTAV 4.0 - the table by Olaf Jenkner show the development of Gustav during the last years (added 23.1.2018)
  • Testing of long selfmates from the WinChloe database - PDF (added 13.7.2009, updated 13.9.2009)
  • Fairy chess endgames - new results 2008 (PDF) - "Electronic edition of chess booklets by Vaclav Kotesovec", volume 2 (added 14.5.2008, corrected 25.5.2008). In September 2008 downloaded 2727 times!
  • Miroslav Soukup (24.10.1903 - 1981 ?) - about famous Czech chess editor and composer (added 25.4.2008, updated 24.8.2011)
  • How many pins is possible by one Ubi-Ubi ? - added 23.1.2008, updated 9.6.2009
  • Vaclav Tuzar (1.5.1868 - 23.4.1908) - the 100th anniversary of the death of Vaclav Tuzar (added 14.1.2008)
  • Vaclav Kotesovec: 30 years of cyclical pin (1977-2007) - PDF - "Electronic edition of chess booklets by Vaclav Kotesovec", volume 1 (added 8.11.2007, corrected 20.11.2007). In period 8.11.2007-30.9.2008 downloaded 2275 times!
  • 4 GB RAM and chess solving programs - added 4.9.2007, updated 10.6.2008 - info about pywin64.exe, updated 2.7.2008 - how break 32 MB limit under Vista, updated 17.9.2009 - how break 32 MB limit under Windows7, updated 25.1.2010 - Alybadix 4 GB RAM under DOS, updated 17.5.2010 - h#4 by Adrian 2 m 53 s
  • Dual core processor and solving of chess problems - added 14.8.2007
  • Summer mathematical problem by Vaclav Kotesovec - added 9.8.2007, PDF version. Úloha byla reprodukována 1.12.2008 v soutěži Q.E.D.
  • How compile and run Popeye under Linux system ? - about break 699 halfmoves limit under Windows (added 18.7.2007)
  • Step by step in helpmates - (added 6.7.2007, 3 examples added 19.3.2009)
  • Palkoskova fakulta - about famous Czech composer Emil Palkoska (added 23.1.2007, last update 29.11.2010)
  • Acrobat 8 and chess diagrams - disillusion (added 5.11.2006, updated 7.11.2006)
  • Only G-promotions in fairy chess (added 10.7.2006, last example added 19.10.2008)
  • Shift of groups of pawns in chess problems (added 28.4.2005, updated 4.11.2005, three hard problems tested 9.4.2023)
  • Alybadix 2005 and (fairy) chess endgames (added 23.4.2005)
  • CIRCE problems, in which EVERY move is capture (added 1.3.2005, last examples added 30.10.2016)
  • Imitator and solving programs (added 14.8.2003)
  • Experiences with scanning of chess publications and creating PDF files (added 4.6.2003, updated 10.2.2005)
  • Hashing and pruning (in Czech with English summary, added 18.4.2003)
  • Some tips for program WinChloe (added 28.3.2003)
  • POPEYE - fantastic results also for orthodox helpstalemates (added 25.2.2003, last example added 12.11.2010)
  • POPEYE is best for testing of orthodox seriehelpstalemates (added 23.1.2003, last example added 11.3.2015)
  • Chess endgames with fairy pieces Pao, Vao, Leo, Lion and Grasshopper (added 16.10.2002), see also Grasshopper endgames after 25 years - Pat a Mat 38/2002 (p.206-208). John Beasley created english version of both my articles for 'Variant Chess', issue 41 - Endings with Grasshoppers, Lions and Chinese pieces (added 25.11.2002)
  • Solving time paradox II (added 2.10.2002, updated 3.10.2002)
  • Big computer test (added 25.9.2002)
  • How solve chess problems on small boards ? (added 21.6.2002, updated 27.6.2002)
  • Some system tips for chess programs (added 7.6.2002)
  • Interesting problem for testing (added 23.8.2001)
  • Solving time paradox (added 16.8.2001)
  • Hashing (in Czech, added 17.3.2000, updated 15.12.2000)
  • Compare of solving programs (added 21.3.2000, updated 16.6.2001, in English), comments (in Czech, updated 15.12.2000)

    Between chessboard and computer (book, 1996, PDF 30MB) A guide for English-speaking readers by John Beasley, 1996 (added 13.4.2000)
    Algorithm descriptions - part of "Between chessboard and computer", VK 1996, in Czech, (added 12.4.2000)
    Fairy endgames - part of "Between chessboard and computer", VK 1996, (added 19.4.2000, updated 8.9.2000)

    List of all my books, booklets and articles, see also e-books


    Articles by other authors published here

  • Umwandlung von 3 gleichfarbigen Bauern im H#3 - collection by Klaus Funk (PDF, in German/English) (added 31.1.2013)
  • Reminiscence about Bretislav Soukup-Bardon - by Tomas Zach. About Czech composer Bretislav Soukup-Bardon (*23.3.1909 - †1.10.1985), in Czech. (added 20.1.2013)
  • Toward a new development of the traditional Chess Composition by adding new pieces in the initial position - by Kiril Stoyanov (PDF, in English) (added 19.3.2011)
  • Kdo se skrývá pod pseudonymem Ingeborg ? - article by Jan Kalendovský about unknown author with pseudonym Ingeborg (in Czech) (added 6.8.2010)
  • A Missing Soukup Problem? - by Steven B. Dowd (added 25.6.2009)
  • New length record s#258 is cooked - info by Frank Müller (added 25.6.2009), new attempt for the absolute lenght record in the selfmate (added 1.10.2009)
  • solution of sd=53 by Eduard Omasta - unique solution of my problem sd=53, 22 Sachove umeni 3/2009, which sent Eduard Omasta (added 1.6.2009)
  • Knihy, které nevyšly - article by Jan Kalendovsky (with supplement by VK) about Czech books, which were not published. In Czech. (added 24.4.2009)
  • Setkání s Miroslavem Soukupem - article about Miroslav Soukup by Jaroslav Karel (PDF, in Czech) (added 12.3.2009)
  • Meine Problemschach-Favoriten - article by Klaus Funk with more than 1000 (!) problems (PDF, in German) (added 2.2.2009), AUW-Duplex Stalemate (added 23.3.2009)
  • Sonet cvrčka - poem by Karol Mlynka (about Grasshopper) (in Slovak) (added 21.5.2008)
  • Vladimir Kos (*20.6.1928 - †2.7.2007) - necrology of V. Kos by Jan Kalendovsky (9.7.2007)
  • The longest moremovers? - article by Bedrich Formanek (added 18.3.2002)


    Dedicated chess problems and articles

  • sh#6 by Vladislav Bunka - dedicated to V.Kotesovec for his 66th birthday, 29.7.2022
  • Series-helpmate in 95 moves by VK - dedicated to Josef Krivohlavek for his 95th birthday (*13.9.1919) (added 30.8.2014)
  • fairy #2 by Adrian Lionel Trent - composed with his program Camelia v1.0, dedicated to V.Kotesovec, 24.3.2014
  • Series-helpmate in 66 moves by VK - dedicated to Alexander Fica for his 66th birthday, 15.12.2013
  • Helpmate by Vladislav Bunka - dedicated to V.Kotesovec for his 57th birthday, 29.7.2013
  • Ivan Skoba: Václav Kotěšovec 50, Šachová skladba 92/2006, p. 2143-2147. A nice article for my 50th birthday describing my chess and life journey. Ivan Skoba managed to capture my compositional attitudes and life views with laser precision. The article was supplemented with 9 reproductions of my problems. In Czech. [In 8137 the black knight a3 is missing and the number of pieces must be (1+41)].
  • Jiří Jelínek: Václav Kotěšovec oslaví v červenci své šedesátiny, Šachová skladba 132/2016, p. 3432-7
  • Pavel Kameník: Václav Kotěšovec – 60 let, Šachové umění 7/2016
  • Jiří Jelínek, Michal Dragoun: Václav Kotěšovec velmistrem, Šachová skladba 161/2023, p. 4362-4365.



    Best chess problems and books by VK

      "234 best chess problems" by Vaclav Kotesovec

    (320 pages, 609 diagrams, photos, tables)
    published: PDF 3.9.2008 (little correction 20.12.2008), printed book 22.9.2008

    free download PDF (5 MB)
    mirror
    (in period 3.9.2008-31.5.2009 downloaded 2952 times!)

    more info about printed books + Errata
    (informace o tištěné knize)
     



      Fairy twomovers 2008-2010
    by Vaclav Kotesovec

    (54 pages, 36 twomovers, 54 diagrams)
    published 28.2.2011, updated version 24.3.2016 (18 new awards added)

    free download PDF (2 MB)





      Application of Graph Theory in Chess Problems
    (Dual-free Leaper and Hopper tours)

    by Vaclav Kotesovec

    (76 pages, 280 diagrams, 33 graphs, 20 tables)
    published 31.5.2009

    free download PDF (3 MB)
    mirror

    Errata (added 8.8.2013)

    Grasshopper Tours - English summary about "Hopper Tours" by John Beasley (Variant Chess 61, July 2009, p.115).
    Dolgij Put Korolya - Nikolai Beluhov, Kvant 4/2010, p. 39-41, also Nikolai Beluhov: "Nyakolko Zadachi po Shahmatna Kombinatorika", Matematematika Plyus, 4/2006, p. 61-64 (not available online).
    Donald Knuth: "The Art of Computer Programming", vol. 4A, 2011, exercise 232 of section 7.1.4, p. 276 and 668 (for n=8)
    Geometrically longest king's closed tour on 8x8 chessboard - by Zvi Mendlowitz (added 3.2.2011)
    A Proof of Willcocks's Conjecture - Nikolai Beluhov, arXiv:1708.05810 [math.CO], 2017 (related to page 42 in my book)


      Non-attacking chess pieces (sixth edition)
    by Vaclav Kotesovec

    The book is devoted to the question of the number of arrangements of non-attacking chess pieces of the same kind on chessboards of various sizes and types. The best-known example is the n-Queens problem, but this publication has a much wider range and includes other chess pieces (kings, rooks, bishops, knights) and many fairy pieces.
    Even though the book is about chess and each problem can be placed among chess-mathematical problems, it will be more readily understandable by mathematicians than by chess players or composers. A partial knowledge of linear algebra, difference equations, generating functions and power series is necessary.

    New in the sixth (and probably final) edition:
  • For pieces Rookhopper and Bishophopper (include number of stalemate positions!) see new chapters 9.9
  • For maximal number of non-attacking riders [r,s], see updated chapter 14.1
  • New formulas for semi-knights and generally for semi-leapers, see new chapter 5.1.2
  • Enhanced table of entropy constants, see page 69
  • New recurrence for bishops on an toroidal chessboard n x n if n is even, see page 280
  • Both constants in the asymptotic formula for composite pieces semi-Rook + semi-Bishop are now in closed form!, see page 717
  • Formula for 10 non-attacking kings on an n x n chessboard, see updated chapter 2.1

    published 2.2.2013 (minor update 8.9.2016), free download PDF (14 MB, 795 pages)
    mirror
  • Related articles:
    Enumerative Combinatorics, Richard P. Stanley (vol. 1, 2ed, 2012, p.558 and 538, exercise 41).
    A q-Queens Problem - Christopher R. H. Hanusa (with Thomas Zaslavsky and Seth Chaiken), MOVES Conference, in New York City, August 2-4, 2015 (PDF / slides)
    A q-Queens Problem, I. General theory - Seth Chaiken, Christopher R. H. Hanusa, Thomas Zaslavsky, Electronic Journal of Combinatorics, 21 (2014), no. 3, Paper P3.33, 28 pp.
    A q-Queens Problem. II. The square board - Seth Chaiken, Christopher R. H. Hanusa, Thomas Zaslavsky, Journal of Algebraic Combinatorics, 41 (2015), no. 3, 619-642
    A q-Queens Problem. III. Nonattacking Partial Queens - Seth Chaiken, Christopher R. H. Hanusa, Thomas Zaslavsky, 21.2.2014, The Australasian Journal of Combinatorics, volume 74(2) (2019), pages 305-331.
    A q-Queens Problem. IV. Attacking Configurations and Their Denominators - Seth Chaiken, Christopher R. H. Hanusa, Thomas Zaslavsky, 10.7.2018
    A q-Queens Problem. V. Some of Our Favorite Pieces: Queens, Bishops, Rooks, and Nightriders - Seth Chaiken, Christopher R. H. Hanusa, Thomas Zaslavsky, 3.9.2016, Journal of the Korean Mathematical Society 2020, Vol. 57, No. 6, 1407-1433.
    A q-Queens Problem. VI. The Bishops' Period - Seth Chaiken, Christopher R. H. Hanusa, Thomas Zaslavsky, 14.5.2014, Ars Mathematica Contemporanea 16 (2019) 549–561
    A q-Queens problem. VII. Combinatorial types of nonattacking chess riders - Christopher R.H. Hanusa, Thomas Zaslavsky, arXiv:1906.08981 [math.CO], 21.6.2019
    Nonattacking Queens in a Rectangular Strip - Seth Chaiken, Christopher R. H. Hanusa, Thomas Zaslavsky, 25.5.2011
    Non-attacking chess pieces: The dance of bishops - Thomas Zaslavsky, 29.7.2010
    The q-Queens Problem: One-Move Riders on the Rectangular Board - Jaimal Ichharam, 27.1.2015
    Podschet rasstanovok ferzey na shakhmatnoy doske - Artem M. Karavaev, Kazanskaya Nauka 10, 2010, p.13-16
    The number of {1243, 2134}-avoiding permutations - David Callan, 15.3.2013
    Injections, Surjections and More - Steven Finch, 7.5.2015
    Asymptotic enumeration by Khintchine-Meinardus method - Boris Granovsky, 26.6.2016, p. 2 and p. 29
    Some useful theorems for asymptotic formulas and their applications to skew plane partitions and cylindric partitions - Guo-Niu Han, Huan Xiong, 16.7.2017, p. 1, 2 and 15
    What is an answer? — remarks, results and problems on PIO formulas in combinatorial enumeration, part I - Martin Klazar, 11.9.2018, p.19, 38, 40, 46, 47.
    A class of symmetric difference-closed sets related to commuting involutions - John M. Campbell, Discrete Mathematics and Theoretical Computer Science, vol. 19:1, 2017, p.4, 7.
    Enumeration and Asymptotic Formulas for Rectangular Partitions of the Hypercube - Yu Hin (Gary) Au, Fatemeh Bagherzadeh, Murray R. Bremner, 3.3.2019, p.10, 27.
    Counting Permutations Where The Difference Between Entries Located r Places Apart Can never be s (For any given positive integers r and s) - George Spahn and Doron Zeilberger, 6.12.2022, p. 2, 7.

    Next my mathematical articles:
  • Asymptotics for a certain group of exponential generating functions - arXiv:2207.10568 [math.CO], a combination of the Hayman's method, Newton's method and limits with LambertW function (in addition: bug in Mathematica found!). OEIS A143405, A355291. (added 13.7.2022)
  • A numerical study of L-convex polyominoes and 201-avoiding ascent sequences, with Anthony Guttmann, arXiv:2109.09928 [math.CO], 21.9.2021
  • Asymptotics of sequence A002513 - added 24.8.2019
  • A method of finding the asymptotics of q-series based on the convolution of generating functions - arXiv:1509.08708 [math.CO], 29.9.2015
  • Asymptotics of the Euler transform of Fibonacci numbers - arXiv:1508.01796 [math.CO], 7.8.2015
  • The partition factorial constant and asymptotics of the sequence A058694 - added 26.6.2015
  • The integration of q-series - added 29.5.2015
  • Asymptotics of the sequence A120733 - added 3.5.2015
  • Asymptotics of sequence A034691 - application of the saddle-point method (added 9.9.2014)
  • Asymptotic of the coefficients A079330 / A088989 - about roots of the equation tan(x)=x (added 20.8.2014)
  • Asymptotic solution of the equations using the Lambert W-function (added 8.8.2014)
  • Asymptotic of subsequences of A212382 (added 17.7.2014)
  • Asymptotic of sequences A161630, A212722, A212917 and A245265 (added 16.7.2014)
  • Asymptotic of sequences A244820, A244821 and A244822 (added 11.7.2014)
  • Asymptotic of implicit functions if Fww = 0 - extension of theorem by Bender (added 19.1.2014)
  • Asymptotic of sequence A227403 - rigorous proof and conjecture (added 21.9.2013)
  • Asymptotic of Young tableaux of bounded height - conjecture (added 12.9.2013)
  • Asymptotic of sequence A084611 (added 26.7.2013)
  • Interesting asymptotic formulas for binomial sums (added 9.6.2013, extended 28.6.2013)
  • Asymptotic of generalized Apéry sequences with powers of binomial coefficients (added 4.11.2012, extended 23.11.2012)
  • Too many errors around coefficient C1 in asymptotic of sequence A002720 - I found bug in program Mathematica! (added 28.9.2012) Update 25.7.2015: This bug was fixed in version 10.2.0.0 / July 2015.
  • Asymptotic of a sums of powers of binomial coefficients * x^k (added 20.9.2012)
  • Asymptotic formula for number of fat trees on n labeled vertices - OEIS A055779 (added 27.8.2012)

    General link for all my mathematical works



      Fairy chess endings on an n x n chessboard (second edition)
    by Vaclav Kotesovec

    Fairy chess endings form relatively the least explored branch of chess, and always offer the possibility of great discoveries. This book follows on from my earlier articles, and presents new results which can be used in fairy studies. I have created my own "tablebases" for fairy pieces and for square boards of various sizes. First edition was published 19.7.2013.

    On the computer with 128 GB of memory was it possible in 2017 to analyze with my program VKcomposer 5.0 new series of endings with fairy pieces. Over 225 different types of endings with 3-6 pieces were analyzed. The second edition contains 2310 diagrams, 54 tables and 88 graphs. In total, my computer was generating new endings during a period of over 8 months (24 hours per day). A new and very interesting chapter in the second edition covers endings without the white king. The group of five-piece endings with king + three leapers of same value against a bare king was extended. From the new results as an example: The ending of king + zebra + nightrider against bare king is won for the stronger side on boards up to 28x28 (where the longest win has 631 moves!). On boards of 29x29 and greater the ending is drawn!

    Second edition published 20.12.2017, free download PDF (43 MB, 866 pages)
    mirror
            




      360 fairy echoes 2012-2024
    by Vaclav Kotesovec

    (390 pages, 360 problems, 96 originals)
    published 7.8.2024

    free download PDF (9 MB)
    (downloaded 540 times in the period from 7.8.2024 to 18.11.2024)
    mirror



    Old computer programs by VK

    VKSACH - solving and composing program of VK (only in Czech language)
    download (vksach.zip, 101 kB, v8.7 17.7.1999)
    Note for (foreign) VKSACH users

    VKS\SUPPORT directory (not need for VKS, but recommended)
    help page for SUPPORT programs
    download (support.zip, 192 kB, 30.8.1999)

    INPFONT - convert INP/OUT to HTM for import into WORD97 (need 1ECHECS.TTF of Ch.Poisson)
    help page for INPFONT
    download (inpfont.zip, 110 kB, v4.5 18.3.2003, contains 4ECHECS.TTF)
    download (examples.zip, 68 kB, 9.8.1999)

    Links to other programs (include comments)


    Photos

    Meeting in Prague, 13.6.2019 (added 14.6.2019 from website by Emil Vlasak)
    Birthday party in Prague, December 14 2017 - Alexander Fica 70*, Vladislav Bunka 80* (added 15.12.2017)
    Ivan Jarolin and Vaclav Kotesovec - Marianka, 17.8 - 21.8.2016
    Mugs gallery - last update 21.9.2016 - Vaclav Kotesovec *60
    Funeral of Slovak composer and my friend Ludo Lehen, Bratislava 16.5.2014 (added 18.5.2014)
    Juraj Lörinc in Prague 28.2.2012 (added 1.3.2012)
    Meeting in Prague, 29.5.2010 (added 29.5.2010)
    Meeting of Czech problemists, Prague 30.5.2009 (added 30.5.2009)
    Meeting of Czech problemists, Prague 22.11.2008 (added 22.11.2008, one new photo added 8.12.2008)
    Meeting of Slovak and Czech chess composers in Modra 21.-22.6.2008 (by Lubos Kekely and by Ivan Skoba) (added 26.6.2008, updated 28.6.2008)
    Meeting in Bratislava and Modra 18.-21.4.2008 (added 22.4.2008)
    Ivan Skoba in Prague 5.4.2008 (added 5.4.2008)
    Celebration of "Alexander Fica 60", Prague 13.12.2007 (added 14.12.2007)
    Celebration of "Vladislav Bunka 70", Kutna Hora 8.12.2007 (added 8.12.2007)
    Meeting in Zlin 19.10.2007 (by Ivan Skoba) (added 31.10.2007)
    Torsten Linss in Prague 24.5.2007 (added 25.5.2007)
    Chess composers - photo jokes (Fotografické žerty) (added 17.4.2007, updated 4.4.2008)
    Andrey Selivanov in Prague 6.1.2007 (added 6.1.2007)
    Celebration of "Vaclav Kotesovec 50", Prague 10.8.2006 (added 11.8.2006)
    Meeting in Prague 9.12.2004 (added 10.12.2004)
    Celebration of "Miroslav Henrych 50", Prague 14.10.2004 (added 15.10.2004)
    Solving tourney Prague 15.-16.5.2004 (added 17.5.2004)
    Meeting in Prague 11.12.2003 (added 11.12.2003)
    Vladislav Bunka and VK in Prague 13.3.2003
    Solving tourney (Bohemians), Prague 16.1.2003 (added 17.1.2003)
    Meeting in Prague 23.3.2002 - portraits of some composers, photos from meeting (added 23.3.2002)
    Hans Gruber in Prague 13.2.2002 (added 13.2.2002)
    photos from Prague 9.8.2001 (added 10.8.2001)
    photos from Prague 14.6.2001 (added 16.6.2001)
    Photos of chess composers (1997-2000) (last update 10.10.2000)
    old photos of Czech and Slovak composers (1974-1988) (last update 25.12.2015)
    very old photos of Czech chess composers (added 25.2.2007, updated 11.4.2007)



    Non-chess

    Vaclav Kotesovec - Best photos 2001-2007 - over 200 photos of trees, animals, flowers and lightnings (created 13.7.2004, updated 31.8.2007)
    Recipes by Ludmila - over 280 photos (updated 30.3.2006)
    Abstract pictures - created from my photos (added 3.1.2006, updated 28.8.2006)
    Neckyáda ve Stružnici - beautiful article by Ludmila (in Czech) with my photos (added 28.8.2005)
    Rare photo of two air-planes by VK - (added 9.5.2012)


    e-mail: kotesovec2(AT)gmail.com - (attachments up to 25 MB)
    For free sending of files up to 30 GB I recommend server uschovna.cz



    Slovníček - dictionary

    českyanglickyněmeckyfrancouzskyfinsky
    CzechEnglishGermanFrenchFinnish
    šachchessSchachéchecsshakki
    KrálKingKönigRoiKuningas
    DámaQueenDameDameKuningatar
    VěžRookTurmTourTorni
    StřelecBishopLäuferFouLähetti
    JezdecKnightSpringerCavalierRatsu
    PěšecPawnBauerPionSotilas
    CvrčekGrasshopperGrashüpferSauterelleHeinäsirkka
    TátošNightriderNachtreiterNoctambuleAituri
    bílýwhiteWeissblancvalkea
    černýblackSchwarznoirmusta
    výzvastipulationForderungénoncévaatimus
    2 řešení2 solutions2 Lösungen2 solutions2 ratkaisua
    zdánlivá hrasetplaySatzspieljeu apparentvaihdelma (h#n)
    zdánlivá hrasetplaySatzspieljeu apparentesipeli (#n)
    tahmoveZugcoupsiirto
    úvodníkkey-moveSchlüsselcléalkusiirto
    pokus (svůdnost)tryVerführungessaihoukutus
    hrozbathreatDrohungmenaceuhkaus
    tempozugzwangZugzwangblocussiirtopakko
    šach! (+)check!Schach!échec!shakki!
    mat (#)mateMattmatmatti
    pat (=)stalematePattpatpatti
    remízadrawRemisnulletasapeli
    úloha (skladba)problemAufgabeproblemetehtävä
    origináloriginalUrdruckinéditensipainos
    exošachfairy chessMärchenschachéchecs féeriquessatushakki
    pomocný mathelpmateHilfsmattmat aidéapumatti
    samomatselfmateSelbstmattmat inverseitsematti
    šachovnicechess boardSchach Brettéchiquiershakkilauta
    polesquareFeldcaseruutu
    kámenpieceSteinpieceshakkinappula
    branícaptureSchlagpriselyönti
    (x,y)skokan(x,y)Leaper(x,y)Springerbondisseur(x,y)(x,y)Juoksija
    (x,y)liniový skokan(x,y)Rider(x,y)Reiter(x,y)de la Nuit(x,y)Kiitäjä
    vedlejší řešenícookNebenlösungdémolisivuratkaisu
    neřešitelnostunsolvableunlösbarinsolubleratkaisuton
    předchůdceanticipationVorgängeranticipationedeltäjä
    cena (c.)prizePreisPrixpalkinto
    čestné uznání (č.u.)honourable mentionehrende ErwähnungMention d'Honneurkunniamaininta
    pochvalná zmínka (p.z.)commendationLobRecommandémaininta




    Scanning of old books and periodicals - see also e-books
    Total 2487 PDF (or DjVu) files available, 160467 pages, 19419 MB (I closed my work on scanning old books and magazines in 2022)



    History:
    19.2.2000 - this website created
    16.5.2001 - 10000th visitor (winner of book: Marek Kwiatkowski)
    25.9.2002 - scanning of old books and periodicals started
    8.11.2004 - improved design of this website
    21.3.2005 - 100000th visitor (winner of FIDE Album: Frantisek Sabol, screenshot)
    2.6.2006 - changed order of links by current content and by frequency of updates
    10.5.2007 - 1000 e-books in PDF archive
    16.6.2007 - 200000th visitor (screenshot sent me Udo Degener)
    1.10.2007 - 50000 pages in PDF archive
    8.11.2007 - electronic edition of chess books by VK started
    26.3.2008 - 250000th visitor
    8.6.2008 - test for broken links, many links deleted, many marked as "broken"
    11.8.2008 - 75000 pages in PDF archive
    3.9.2008 - my book "234 best chess problems" published
    31.10.2008 - "234 best chess problems" downloaded more than 1000 times
    25.12.2008 - scanning of Czech chess magazines published in 20th century finished
    27.12.2008 - 300000th visitor (screenshot sent me Udo Degener)
    24.3.2009 - 10000 MB in PDF archive
    16.4.2009 - 1500 e-books in PDF archive
    23.6.2009 - 333333rd visitor (screenshot sent me Daniel Novomesky)
    28.8.2009 - 100000 pages in PDF archive
    7.12.2009 - set rating of Google-books
    20.12.2009 - 370000th visitor (screenshot sent me Christian Poisson)
    12.4.2010 - 400000th visitor
    1.11.2010 - 444444th visitor (screenshot sent me Udo Degener)
    11.7.2011 - 500000th visitor (screenshot sent me Udo Degener)
    14.7.2011 - e-books and magazines sorted
    8.8.2011 - famous chess columns from the newspapers "Narodni Politika" and "Narodni Listy" 1898-1940 added.
    9.1.2012 - 2000 e-books in PDF archive
    14.1.2012 - test for broken links
    4.4.2012 - 555555th visitor
    15.10.2012 - 600000th visitor
    10.6.2013 - 654321th visitor (screenshot sent me Daniel Novomesky)
    2.8.2013 - 666666th visitor (screenshot sent me Udo Degener)
    2.1.2014 - 700000th visitor (screenshot sent me Udo Degener)
    3.8.2014 - several links, which were not updated long time, moved to other place
    14.9.2014 - 750000th visitor
    16.1.2015 - 777777th visitor (screenshot sent me Udo Degener)
    17.1.2015 - 5000 my mathematical formulas in the OEIS
    14.4.2015 - 800000th visitor (screenshot sent me Udo Degener)
    31.7.2015 - my book "Non-attacking chess pieces", 6ed, downloaded (in period 2013-2015) 20842 times!
    11.9.2015 - domain web.telecom.cz was canceled by provider
    15.9.2015 - website moved to www.kotesovec.cz
    5.12.2015 - 150000 pages in PDF archive
    14.2.2016 - 850000th visitor
    8.3.2016 - big test for broken links, over 350 (!) links marked as broken
    4.11.2016 - 888880th visitor (screenshot sent me Adrian Storisteanu)
    16.1.2017 - 900000th visitor
    28.11.2017 - 10000 my mathematical formulas, programs and comments in the OEIS
    9.12.2017 - 950000th visitor
    4.1.2018 - 3000 my chess problems in the WinChloe database
    14.4.2018 - reputation 1000 in mathematica.stackexchange.com
    30.9.2018 - millionth visitor (screenshot 1000017)
    18.10.2018 - the website migrated to another server, domain www.kotesovec.cz unchanged
    1.5.2020 - 1100000th visitor
    22.6.2020 - 1111111th visitor (screenshot sent me Mikalai Sihnevich)
    7.7.2020 - reputation 2000 in mathematica.stackexchange.com
    14.8.2020 - 10000 of my updates on the PDB server
    5.7.2021 - 15000 my mathematical formulas, programs and comments in the OEIS
    30.9.2021 - 1200000th visitor
    31.3.2022 - 1240000th visitor
    16.12.2022 - 1300000th visitor of this website
    14.1.2024 - 1400000th visitor (screenshot sent me Udo Degener)
    10.6.2024 - reputation 3000 in mathematica.stackexchange.com
    7.8.2024 - my book "360 fairy echoes 2012-2024" published


    © Vaclav Kotesovec
    International Grandmaster of the FIDE for Chess Compositions (2023)
    Grandmasters of the FIDE for Chess Compositions
    WCCI 2019-21, 3rd Place (2022)
    Certificate of Reviewing - Discrete Mathematics (2019)
    IQ Certificate (2017)
    Endorsement ArXiv - math.CO - Combinatorics (2015)
    International judge of the FIDE (2010)
    FIDE olympic tourney 2010 - Khanty-Mansiysk, Bronze medal
    International master of the FIDE for chess compositions (2005)


    home page