rnbq2nr/1p1pk1bp/p7/2pp2p1/P4pP1/2P2P2/1P1PP1BP/RNBQKR2 b Q - 0 10
FEN state: rnbq2nr/1p1pk1bp/p7/2pp2p1/P4pP1/2P2P2/1P1PP1BP/RNBQKR2 b Q - 0 10 ; Best move: d5d4
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black queen at d8, black knight at g8 and black rook at h8. Black pawn at b7, black pawn at d7, black king at e7, black bishop at g7 and black pawn at h7. Black pawn at a6. Black pawn at c5, black pawn at d5 and black pawn at g5. White pawn at a4, black pawn at f4 and white pawn at g4. White pawn at c3 and white pawn at f3. White pawn at b2, white pawn at d2, white pawn at e2, white bishop at g2 and white pawn at h2. White rook at a1, white knight at b1, white bishop at c1, white queen at d1, white king at e1 and white rook at f1. White queenside is the only castle move available. Half move number is 0. Full move number is 10. Black to move.