1rb2bnr/p1pkq1p1/5p1p/1p1pp2P/1PP1P3/3B2QR/P2P1PP1/RNB1K1N1 b Q - 4 12
FEN state: 1rb2bnr/p1pkq1p1/5p1p/1p1pp2P/1PP1P3/3B2QR/P2P1PP1/RNB1K1N1 b Q - 4 12 ; Best move: d5c4
The current state of the chess board is: Black rook at b8, black bishop at c8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at a7, black pawn at c7, black king at d7, black queen at e7 and black pawn at g7. Black pawn at f6 and black pawn at h6. Black pawn at b5, black pawn at d5, black pawn at e5 and white pawn at h5. White pawn at b4, white pawn at c4 and white pawn at e4. White bishop at d3, white queen at g3 and white rook at h3. White pawn at a2, white pawn at d2, white pawn at f2 and white pawn at g2. White rook at a1, white knight at b1, white bishop at c1, white king at e1 and white knight at g1. White queenside is the only castle move available. Half move number is 4. Full move number is 12. Black to move.