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Borislav Ivanov vs Robert Zelcic
19th Open A 2012  ·  Trompowsky Attack: General (A45)  ·  1-0
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sac: 22.gxf4 PGN: download | view Help: general | java-troubleshooting

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Kibitzer's Corner
Jan-06-13  thomastonk: White played perfect here, but it seems to me that all of his moves are easy to find. And Black is on a self-destructive way.
Jan-08-13  gerakus: Hhehehehe all the moves white made, houdini 3 recomends as best move :)
Jan-09-13
Premium Chessgames Member
  Dr. Funkenstein: http://www.chessbase.com/newsdetail...
Jan-09-13  Aiuta: 100% cheat.
Jan-09-13  Mendrys: I'm not so sure. As thomastonk has pointed out almost all of his moves were easy to find. Black has developed poorly and the "combination" as it were beginning with 20. Nxf4 isn't too hard to see.
Jan-09-13
Premium Chessgames Member
  Dr. Funkenstein: In a vacuum, it's possible that Ivanov simply pulled out a great game. However, the chessbase article I cite is interesting in that it shows some of his previous games from a very short time ago versus a recent series of games against 2500 and 2600 players. I think it's more likely he was cheating than not given the circumstances.

However, take a look at the one of the letters sent in at the end of the string from chessbase. The author points out that move matching is not enough, there has to be an algorithm that factors in the number of plausible moves. Anyone can match a computer move for move in a forcing combination or simple K+P endgame for example.

Lilov's analysis in the chessbase article is excellent in that he examines the general style of play of this player and the situations in which he wins and loses, but it's lacking in the more comprehensive of analysis of when Ivanov supposedly follows a computer's line exactly when a large number of plausible moves are available. There is also no attempt to analyze how often a 2700 player (basically the level that Ivanov played at in this tournament) follows computer lines in a game exactly and comparing Ivanov's % to it.

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