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Comment by zeroer | Hacker News Reader

It doesn't recognize threefold repetition draw. Also, a couple times I saw it miss some tricky tactics that would have won. Very nice and fun idea with a bit of polish. It needs a real chess engine.

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  It doesn't recognize threefold repetition draw.

That isn't an automatic draw like a stalemate is; either player can claim a draw at that point.

Fun fact: in the Fischer vs. Spassky title match, the judge made an error in awarding Fisher a draw by misinterpreting the rule!

You're right. But what I saw the computer do was repeat the same position thousands of times in an identical cycle of four moves. A decent AI should stop wasting its time and claim a draw at that point. So maybe this is also an AI strength issue rather than the platform recognizing a draw.

Upon repetition a red link should appear next to "Guess Draw". I set the engine now by default to "slowest" should play around ELO 1900

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