# Questions tagged [threefold-repetition]

For questions about the threefold repetition rule, which states a player can claim a draw if it's his/her move and a position has appeared / is about to appear which happened before at least twice.

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### Does threefold repetition take into account the side to move?

To be more clear, here is a fragment of a game: [FEN "4k3/R7/6r1/3KP3/8/8/8/8 w - - 0 1"] 1. Ra2 Rg5 2. Ra7 Rg6 3. Ra2 Rg5 4. Ra7 Rg6 5. Ra4 Rg5 6. Ra2 From the FIDE Laws of Chess: 5.5.1 d. ...
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5k views

### Programming three-fold repetition for my chess engine

I'm making a chess engine that has to implement a three-fold repetition as my AI vs AI engine repeats the same moves over and over again (Have a look at my post here - My chess AI makes the same ...
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### Rules: How does right to castle and en passant get considered for the purpose of calculating a threefold repetition?

I'm writing a chess app, and have some questions regarding the intricacies of the threefold repetition rules. As of 2018, the FIDE handbook has this to say about what constitutes identical positions ...
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### A New Year's Math Riddle

Here's a fun and clean riddle for the New Year! I found the material for it on Krabbe's site. I will provide the link when it is solved. How many times can this position be repeated, with both sides ...
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### What's the maximum number of moves that can result in a threefold repetition from an arbitrary position?

Assume that the fifty-move rule does not require a player to claim a draw. Instead, the game is automatically declared a draw if no pawns have been moved and no pieces have been captured in the last ...
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### Najdorf threefold repition

In the Sicilian Najdorf there is a well known line which ends in threefold repition (if both players want). [Event "NN"] [ECO "B90"] [Opening "Sicilian Defense: Najdorf Variation, English Attack, ...
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