Chess Game Comparison

AI strength is determined by how long it takes Stockfish 11 (Depth: 22) to mate the AI. Unless otherwise stated, the most difficult AI is chosen. The titles are sorted by implementation correctness, then AI strength, then alphebetically. Implementation errors are sorted from most to least problematic. If a game is marked as green, I have tested that all rules are followed. Things checked for:

Title Author Year Properly Implemented? AI Strength Average turn time Notes
chessonlinefree.com 2008 ✓ 74
chess.com 2007 ✓ 83
Kasparov's Gambit (MS-DOS) 1993 ✓ 56 15 AI allows itself 15s/turn thinking time
Chessmaster (NDS) 2007 ✓ 53 20 Took about 18 minutes total for the AI to think
Wii Chess 2008 ✓ 44 76 Took about 56 minutes for Wii Chess to play. Some moves were instantaneous while others lasted several minutes.
Chessmaster 4000 Turbo (Windows 3.1) 1993 ✓ 39 Chessmaster estimates Stockfish's rating at 1787
Pico Chess Krystman 2018 ✓ 33 6 Deterministic; forced mate in 16 for white
Chessmaster (SNES) 1991 ✓ 32
3/2 Chess : Three Players Chess shurf771 2015 ✓ 31 1.7
flashCHESS III liviurene 2009 ✓ 25 0.14 Pseudo-3D
Master Chess Multiplayer goalmaniac 2019 ✓ 20 2.65
Ultimate Chess RatherRandomReality 2010 ✓ 19
ChessJak doomoller 2010 ✓ 18 crashes often; unknown if underpromotion works
Battlechess (MS-DOS) 1988 ✓ 14 amusing animations and sfx
Easy Chess JamesBurton 2005 ✓ 14 Hard to distinguish bishop from knight; nonstandard move notation
Chess AI Game veclock 2011
  • no underpromotion
 25
chessgame uzuriel 2011
  • no queenside castling
  • no en passant
  • no underpromotion
 25
ZNEMCHESS znem 2010
  • no queenside castling
  • no en passant
  • no underpromotion
 17
Halloween Chess Sparkplug90 2008
  • no queenside castling
  • no en passant
  • no underpromotion
 27
Chess... Smarandoiu 2008
  • no castling after check
  • no en passant
  • no underpromotion
 9
Chogue lablablab-games 2018
  • black's king flees the chessboard through a stairwell first move
  • opponent skips turn if only their pawns remain
  • no castling
 n/a AI greatly values pawns; unknown if en passant implemented
Mind Games for 2 Player RHMGames 2019
  • can move into check
  • no castling
  • incorrect board checkers
 22 en passant implemented; no undo; no move history; unknown if underpromotion implemented
Chess Scarydoll 2003
  • opponent will smash your head into the chessboard when you move
 n/a