[White "White"] [Black "Black #1"] [FEN "2br1rk1/1pp1bppp/p1p2n2/4p1B1/1q2P3/2NP1NP1/PPP2PBP/R1Q1R2K w - - 0 0"] {Why is this position illegal ? - Black has doubled c-pawns, but white is not missing any pieces, so there could not have been a capture on c6 _MARK:c6-7_} *