r5nr/pp1bp3/n2pkppb/1q6/2P1PPpP/2N1Q3/3P4/RqB1KB1R w Q - 0 25
FEN state: r5nr/pp1bp3/n2pkppb/1q6/2P1PPpP/2N1Q3/3P4/RqB1KB1R w Q - 0 25 ; Best move: c4b5
The current state of the chess board is: Black rook at a8, black knight at g8 and black rook at h8. Black pawn at a7, black pawn at b7, black bishop at d7 and black pawn at e7. Black knight at a6, black pawn at d6, black king at e6, black pawn at f6, black pawn at g6 and black bishop at h6. Black queen at b5. White pawn at c4, white pawn at e4, white pawn at f4, black pawn at g4 and white pawn at h4. White knight at c3 and white queen at e3. White pawn at d2. White rook at a1, black queen at b1, white bishop at c1, 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 0. Full move number is 25. White to move.