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HELP

A: It's quite simple — you cannot use anything besides your own brain, and you cannot consult anyone besides yourself. That includes chess programs, chess engines or chess computers, your friends, colleagues etc. etc. — using any of them is strictly prohibited.

Chess books and game/move databases are allowed (as they are permitted in correspondence chess too), with the exception of endgame tablebases. Nalimov endgame tablebases, or any other books/programs/tools that show the exact moves to make for a guaranteed win/draw from a given position on the board, are not permitted.

This only applies to games that are still in progress, and games that are rated, or a part of a competition. Feel free to analyze your games with chess engines or discuss them with your friends after the game is over, but not while the game is still in progress. Unrated games are excepted as well, as they are generally played for learning purposes. However, both opponents must understand beforehand that the game will be unrated and that outside assistance will be used during the game.

If you have a concrete evidence that someone is cheating, please submit a formal complaint, and we will review the case. Please make sure it is not a mere "I suspect my opponent is using a chess program", or "his/her moves feel too computer-like". Unless we can conclusively prove that a player is cheating beyond any reasonable doubt, we would very much prefer to wait until there is more evidence available, instead of accusing a completely innocent player.

Please note that someone winning a large number of games in a row is not a conclusive evidence of cheating as it often happens when a strong player chooses their opponents to be mostly lower-rated, which is technically not against the rules, and it is relatively easy to achieve for a higher-rated player.

Also, a chess engine "agreeing" with most of the moves made by a player does not necessarily prove that they were cheating. It can also mean that the player's rating is on par with the chess engine's playing strength (or better). It could also be because the game was progressing in such a way that there was only one decisive (or non-losing) move at each turn. On the other hand, if for example a player routinely loses to lower rated players and then suddenly starts playing like a grandmaster, that would be very strong evidence that they are cheating. In any case, please refrain from using a chess engine to analyze any games still in progress, as not only it is against the rules by itself, but it is also very unlikely to prove that your opponent is cheating.
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