2bk3r/1rn2pbp/1pp2n2/p2pPpp1/P7/3PBBPP/1N5R/RqQ1K1N1 b Q - 1 23
FEN state: 2bk3r/1rn2pbp/1pp2n2/p2pPpp1/P7/3PBBPP/1N5R/RqQ1K1N1 b Q - 1 23 ; Best move: b1c1
The current state of the chess board is: Black bishop at c8, black king at d8 and black rook at h8. Black rook at b7, black knight at c7, black pawn at f7, black bishop at g7 and black pawn at h7. Black pawn at b6, black pawn at c6 and black knight at f6. Black pawn at a5, black pawn at d5, white pawn at e5, black pawn at f5 and black pawn at g5. White pawn at a4. White pawn at d3, white bishop at e3, white bishop at f3, white pawn at g3 and white pawn at h3. White knight at b2 and white rook at h2. White rook at a1, black queen at b1, white queen at c1, white king at e1 and white knight at g1. White queenside is the only castle move available. Half move number is 1. Full move number is 23. Black to move.