r1b1kb2/q4prp/1P4p1/pppp2P1/PQ2p3/1P1PKP2/6NP/1RB2B1R w q - 1 25
FEN state: r1b1kb2/q4prp/1P4p1/pppp2P1/PQ2p3/1P1PKP2/6NP/1RB2B1R w q - 1 25 ; Best move: b4b5
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at e8 and black bishop at f8. Black queen at a7, black pawn at f7, black rook at g7 and black pawn at h7. White pawn at b6 and black pawn at g6. Black pawn at a5, black pawn at b5, black pawn at c5, black pawn at d5 and white pawn at g5. White pawn at a4, white queen at b4 and black pawn at e4. White pawn at b3, white pawn at d3, white king at e3 and white pawn at f3. White knight at g2 and white pawn at h2. White rook at b1, white bishop at c1, white bishop at f1 and white rook at h1. Black queenside is the only castle move available. Half move number is 1. Full move number is 25. White to move.