From reader Éric Angelini: During a standard chess game, after Black’s fifth move we notice that three rooks have been captured on the same dark square. Which square is it?

| SelectClick for Answer | | --- | | a3. The game runs:1. b4 a52. h4 axb43. Rh3 Rxa24. Ra3 Rxa35. Rxa3 bxa3The moves are illustrated here (line b). (Thanks, Éric.) |

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