Detection by Computer

Discussion of anything and everything relating to chess playing software and machines.

Moderators: hgm, Rebel, chrisw

Norm Pollock
Posts: 1059
Joined: Thu Mar 09, 2006 4:15 pm
Location: Long Island, NY, USA

Detection by Computer

Post by Norm Pollock »

Using some of my tools I was able to detect some GM shenanigans. I would like to share my methods, but who would be interested?

Here are two human-human games, a day apart, with 2 different pairs of players. Games are practically identical. The only differences are the interchange of moves 22 and 23, and a discovered check on White's move 29 where the blocking knight moves to a different harmless square. Both games were draws.

Code: Select all

[Event "Corus B"]
[Site "Wijk aan Zee NED"]
[Date "2009.01.27"]
[Round "9"]
[White "Volokitin, And"]
[Black "Kasimdzhanov, R."]
[Result "1/2-1/2"]
[WhiteElo "2671"]
[BlackElo "2687"]
[ECO "C92u"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6
8. c3 O-O 9. h3 Re8 10. d4 Bb7 11. Nbd2 Bf8 12. a4 h6 13. Bc2 exd4
14. cxd4 Nb4 15. Bb1 c5 16. d5 Nd7 17. Ra3 c4 18. axb5 axb5 19. Nd4 Rxa3
20. bxa3 Nd3 21. Bxd3 cxd3 22. Re3 Nc5 23. Bb2 Qa5 24. Nf5 g6 25. Ng3 b4
26. Nh5 bxa3 27. Nf6+ Kh8 28. Ba1 Rc8 29. Nh5+ Kg8 30. Nf6+ Kh8 31. Nh5+
1/2-1/2

[Event "Corus A"]
[Site "Wijk aan Zee NED"]
[Date "2009.01.28"]
[Round "10"]
[White "Stellwagen, D."]
[Black "Morozevich, Alexander"]
[Result "1/2-1/2"]
[WhiteElo "2612"]
[BlackElo "2771"]
[ECO "C92u"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6
8. c3 O-O 9. h3 Re8 10. d4 Bb7 11. Nbd2 Bf8 12. a4 h6 13. Bc2 exd4
14. cxd4 Nb4 15. Bb1 c5 16. d5 Nd7 17. Ra3 c4 18. axb5 axb5 19. Nd4 Rxa3
20. bxa3 Nd3 21. Bxd3 cxd3 22. Bb2 Qa5 23. Re3 Nc5 24. Nf5 g6 25. Ng3 b4
26. Nh5 bxa3 27. Nf6+ Kh8 28. Ba1 Rc8 29. Ne8+ Kg8 30. Nf6+ Kh8 31. Nh5+
1/2-1/2
Terry McCracken
Posts: 16465
Joined: Wed Aug 01, 2007 4:16 am
Location: Canada

Re: Detection by Computer

Post by Terry McCracken »

Norm Pollock wrote:Using some of my tools I was able to detect some GM shenanigans. I would like to share my methods, but who would be interested?

Here are two human-human games, a day apart, with 2 different pairs of players. Games are practically identical. The only differences are the interchange of moves 22 and 23, and a discovered check on White's move 29 where the blocking knight moves to a different harmless square. Both games were draws.

Code: Select all

[Event "Corus B"]
[Site "Wijk aan Zee NED"]
[Date "2009.01.27"]
[Round "9"]
[White "Volokitin, And"]
[Black "Kasimdzhanov, R."]
[Result "1/2-1/2"]
[WhiteElo "2671"]
[BlackElo "2687"]
[ECO "C92u"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6
8. c3 O-O 9. h3 Re8 10. d4 Bb7 11. Nbd2 Bf8 12. a4 h6 13. Bc2 exd4
14. cxd4 Nb4 15. Bb1 c5 16. d5 Nd7 17. Ra3 c4 18. axb5 axb5 19. Nd4 Rxa3
20. bxa3 Nd3 21. Bxd3 cxd3 22. Re3 Nc5 23. Bb2 Qa5 24. Nf5 g6 25. Ng3 b4
26. Nh5 bxa3 27. Nf6+ Kh8 28. Ba1 Rc8 29. Nh5+ Kg8 30. Nf6+ Kh8 31. Nh5+
1/2-1/2

[Event "Corus A"]
[Site "Wijk aan Zee NED"]
[Date "2009.01.28"]
[Round "10"]
[White "Stellwagen, D."]
[Black "Morozevich, Alexander"]
[Result "1/2-1/2"]
[WhiteElo "2612"]
[BlackElo "2771"]
[ECO "C92u"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6
8. c3 O-O 9. h3 Re8 10. d4 Bb7 11. Nbd2 Bf8 12. a4 h6 13. Bc2 exd4
14. cxd4 Nb4 15. Bb1 c5 16. d5 Nd7 17. Ra3 c4 18. axb5 axb5 19. Nd4 Rxa3
20. bxa3 Nd3 21. Bxd3 cxd3 22. Bb2 Qa5 23. Re3 Nc5 24. Nf5 g6 25. Ng3 b4
26. Nh5 bxa3 27. Nf6+ Kh8 28. Ba1 Rc8 29. Ne8+ Kg8 30. Nf6+ Kh8 31. Nh5+
1/2-1/2
Finding these type of games lends credence that many games are pre-arranged.

Not really surprising but disappointing.
Last edited by Terry McCracken on Wed Jul 07, 2010 2:10 am, edited 1 time in total.
Terry McCracken
Albert Silver
Posts: 3026
Joined: Wed Mar 08, 2006 9:57 pm
Location: Rio de Janeiro, Brazil

Re: Detection by Computer

Post by Albert Silver »

Norm Pollock wrote:Using some of my tools I was able to detect some GM shenanigans. I would like to share my methods, but who would be interested?

Here are two human-human games, a day apart, with 2 different pairs of players. Games are practically identical. The only differences are the interchange of moves 22 and 23, and a discovered check on White's move 29 where the blocking knight moves to a different harmless square. Both games were draws.

Code: Select all

[Event "Corus B"]
[Site "Wijk aan Zee NED"]
[Date "2009.01.27"]
[Round "9"]
[White "Volokitin, And"]
[Black "Kasimdzhanov, R."]
[Result "1/2-1/2"]
[WhiteElo "2671"]
[BlackElo "2687"]
[ECO "C92u"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6
8. c3 O-O 9. h3 Re8 10. d4 Bb7 11. Nbd2 Bf8 12. a4 h6 13. Bc2 exd4
14. cxd4 Nb4 15. Bb1 c5 16. d5 Nd7 17. Ra3 c4 18. axb5 axb5 19. Nd4 Rxa3
20. bxa3 Nd3 21. Bxd3 cxd3 22. Re3 Nc5 23. Bb2 Qa5 24. Nf5 g6 25. Ng3 b4
26. Nh5 bxa3 27. Nf6+ Kh8 28. Ba1 Rc8 29. Nh5+ Kg8 30. Nf6+ Kh8 31. Nh5+
1/2-1/2

[Event "Corus A"]
[Site "Wijk aan Zee NED"]
[Date "2009.01.28"]
[Round "10"]
[White "Stellwagen, D."]
[Black "Morozevich, Alexander"]
[Result "1/2-1/2"]
[WhiteElo "2612"]
[BlackElo "2771"]
[ECO "C92u"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6
8. c3 O-O 9. h3 Re8 10. d4 Bb7 11. Nbd2 Bf8 12. a4 h6 13. Bc2 exd4
14. cxd4 Nb4 15. Bb1 c5 16. d5 Nd7 17. Ra3 c4 18. axb5 axb5 19. Nd4 Rxa3
20. bxa3 Nd3 21. Bxd3 cxd3 22. Bb2 Qa5 23. Re3 Nc5 24. Nf5 g6 25. Ng3 b4
26. Nh5 bxa3 27. Nf6+ Kh8 28. Ba1 Rc8 29. Ne8+ Kg8 30. Nf6+ Kh8 31. Nh5+
1/2-1/2
This is nothing new. Either both players in the second game were content with a draw, or both were ok with a draw and wondering what the other had prepared, which turned out to be nothing. I am guessing the 1st case, and was how they got past the minimum move rule before drawing.
"Tactics are the bricks and sticks that make up a game, but positional play is the architectural blueprint."
Nimzovik
Posts: 1831
Joined: Sat Jan 06, 2007 11:08 pm

Re: Detection by Computer

Post by Nimzovik »

Ah yes..... This was Fischers Lament concerning the Russians. These days I just have fun researching my chess book and playing exploration/creativity chess on the net. Tournaments are full of bogus rated players and other shenanigans to the point I simply do not enjoy it.
Terry McCracken
Posts: 16465
Joined: Wed Aug 01, 2007 4:16 am
Location: Canada

Re: Detection by Computer

Post by Terry McCracken »

Nimzovik wrote:Ah yes..... This was Fischers Lament concerning the Russians. These days I just have fun researching my chess book and playing exploration/creativity chess on the net. Tournaments are full of bogus rated players and other shenanigans to the point I simply do not enjoy it.
The players are top notch but they do copy games when there's no need to do anything else.

That's sad but that's life. Fischer tried to make something more sinister out of it. Half-truths are propaganda.
Terry McCracken