r1bqkbn1/p1pp2pr/4p3/np4Pp/NP3p1P/P1PP3B/3QPP2/1RBK2NR b - - 0 13
FEN state: r1bqkbn1/p1pp2pr/4p3/np4Pp/NP3p1P/P1PP3B/3QPP2/1RBK2NR b - - 0 13 ; Best move: c8b7
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8, black king at e8, black bishop at f8 and black knight at g8. Black pawn at a7, black pawn at c7, black pawn at d7, black pawn at g7 and black rook at h7. Black pawn at e6. Black knight at a5, black pawn at b5, white pawn at g5 and black pawn at h5. White knight at a4, white pawn at b4, black pawn at f4 and white pawn at h4. White pawn at a3, white pawn at c3, white pawn at d3 and white bishop at h3. White queen at d2, white pawn at e2 and white pawn at f2. White rook at b1, white bishop at c1, white king at d1, white knight at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 0. Full move number is 13. Black to move.