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YChess,
a family of chess programs by Roman Antonczyk, early Postcardware MS-DOS versions from the mid 90s running on 386 PCs with VGA or SVGA graphics cards. DOS Version 1.09, as available in the Internet Archive, mentions in its readme file a new command line options to adjust the transposition table size, recapture extensions, and modified passed pawn extensions ^[1]. The later, no longer available Windows version YChess 1.0 was commercial distributed via the Kagi.com e-commerce micropayment platform ^[2]. It is a native engine with an own WinBoard and UCI compliant GUI ^[3] and apparently own endgame tablebases ^[4].

Screenshots

DOS

YChess 1.09 DOS Screen [5]

Windows

YChess 1.0 Windows GUI [6]

Forum Posts

1996 ...

• Downloading YChess 1.08 by Alastair Scott, rgcc, July 30, 1996
• ychess FAQ by Dimiter Kurtev, rgcc, August 16, 1996
• YChess by Dimiter Kurtev, rgcc, September 04, 1997
• YCHESS 1.10 !! by Jouni Uski, rgcc, May 21, 1997
• Re: Deep Blue Vs. Kasparov by PMG, rgcc, June 21, 1999

2000 ...

• The YChess case.... by Fernando Villegas, CCC, April 26, 2005
• Will Zappa go the same way as Pirat/YChess GUI's ? by Michael Diosi, CCC, September 05, 2005
• YChess by Fernando Villegas, CCC, September 28, 2008

2010 ...

• Ychess 1.0 for Windows by Roman Antonczik by Norbert Raimund Leisner, CCC, August 24, 2013
  Re: YChess 1.0 = a superb engine & GUI by Ruxy Sylwyka, CCC, August 26, 2013
• YChess 1.0 = around 2575 ELO CCRL (4/40) by Ruxy Sylwyka, CCC, September 01, 2013
• Tablebases Generator of YChess 1.0 by Norbert Raimund Leisner, CCC, September 25, 2013

External Links

• YChess 1.09 : Free Download & Streaming : Internet Archive
• Free Chess Downloads - Oldies collection hosted by Ed Schröder
• Y Chess 1.10 hosted by Pavel Háse

References

1. ^ YChess 1.09 : Free Download & Streaming : Internet Archive, YchessV1.091995romanAntonczykstrategyChess.zip README.TXT
2. ^ Ychess 1.0 for Windows by Roman Antonczik by Norbert Raimund Leisner, CCC, August 24, 2013
3. ^ Re: YChess 1.0 = a superb engine & GUI by Ruxy Sylwyka, CCC, August 26, 2013
4. ^ Tablebases Generator of YChess 1.0 by Norbert Raimund Leisner, CCC, September 25, 2013
5. ^ Septober - Computerschach by Herbert Marquardt
6. ^ Re: YChess 1.0 = a superb engine & GUI by Ruxy Sylwyka, CCC, August 26, 2013

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