r1b1kbr1/2q3p1/nnpp4/P3pPNp/1ppP1P1P/2R1P3/1P1K2B1/1NB4R w q - 1 25
FEN state: r1b1kbr1/2q3p1/nnpp4/P3pPNp/1ppP1P1P/2R1P3/1P1K2B1/1NB4R w q - 1 25 ; Best move: a5b6
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at e8, black bishop at f8 and black rook at g8. Black queen at c7 and black pawn at g7. Black knight at a6, black knight at b6, black pawn at c6 and black pawn at d6. White pawn at a5, black pawn at e5, white pawn at f5, white knight at g5 and black pawn at h5. Black pawn at b4, black pawn at c4, white pawn at d4, white pawn at f4 and white pawn at h4. White rook at c3 and white pawn at e3. White pawn at b2, white king at d2 and white bishop at g2. White knight at b1, white bishop at c1 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.