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This is very nice! But I don’t quite get how 70% is considered good performance — I managed to outperform that by literally doing nothing:

Game Complete!

Accuracy: 78.6% Correct Responses: 11 / 14 Average Reaction Time: 0 ms

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Yes, though 70% is a normal cut-off, I think most versions more heavily bias the placement towards 1/2 in the past square instead of the 1/9th of real chance. Without the bias it is simpler to always guess no.

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