rnbqkb2/3p2rp/p3p1pB/1ppP1p2/1P3P2/2P4P/P1K1P1P1/RN1QNB1R w q - 4 12
FEN state: rnbqkb2/3p2rp/p3p1pB/1ppP1p2/1P3P2/2P4P/P1K1P1P1/RN1QNB1R w q - 4 12 ; Best move: b4c5
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 king at e8 and black bishop at f8. Black pawn at d7, black rook at g7 and black pawn at h7. Black pawn at a6, black pawn at e6, black pawn at g6 and white bishop at h6. Black pawn at b5, black pawn at c5, white pawn at d5 and black pawn at f5. White pawn at b4 and white pawn at f4. White pawn at c3 and white pawn at h3. White pawn at a2, white king at c2, white pawn at e2 and white pawn at g2. White rook at a1, white knight at b1, white queen at d1, white knight at e1, white bishop at f1 and white rook at h1. Black queenside is the only castle move available. Half move number is 4. Full move number is 12. White to move.