rn1q1bnr/2p1k3/2b1pp2/pp1p2pp/1P4PP/B2PPN2/P1PQ1P2/RN2KB1R b Q - 5 12
FEN state: rn1q1bnr/2p1k3/2b1pp2/pp1p2pp/1P4PP/B2PPN2/P1PQ1P2/RN2KB1R b Q - 5 12 ; Best move: d5d4
The current state of the chess board is: Black rook at a8, black knight at b8, black queen at d8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at c7 and black king at e7. Black bishop at c6, black pawn at e6 and black pawn at f6. Black pawn at a5, black pawn at b5, black pawn at d5, black pawn at g5 and black pawn at h5. White pawn at b4, white pawn at g4 and white pawn at h4. White bishop at a3, white pawn at d3, white pawn at e3 and white knight at f3. White pawn at a2, white pawn at c2, white queen at d2 and white pawn at f2. White rook at a1, white knight at b1, white king at e1, white bishop at f1 and white rook at h1. White queenside is the only castle move available. Half move number is 5. Full move number is 12. Black to move.