rn1q1b1r/3ppk2/b4ppn/ppp2P1p/2P4P/P3N3/1P1PP1PR/R1BQKBN1 w Q - 3 10
FEN state: rn1q1b1r/3ppk2/b4ppn/ppp2P1p/2P4P/P3N3/1P1PP1PR/R1BQKBN1 w Q - 3 10 ; Best move: c4b5
The current state of the chess board is: Black rook at a8, black knight at b8, black queen at d8, black bishop at f8 and black rook at h8. Black pawn at d7, black pawn at e7 and black king at f7. Black bishop at a6, black pawn at f6, black pawn at g6 and black knight at h6. Black pawn at a5, black pawn at b5, black pawn at c5, white pawn at f5 and black pawn at h5. White pawn at c4 and white pawn at h4. White pawn at a3 and white knight at e3. White pawn at b2, white pawn at d2, white pawn at e2, white pawn at g2 and white rook at h2. White rook at a1, white bishop at c1, white queen at d1, white king at e1, white bishop at f1 and white knight at g1. White queenside is the only castle move available. Half move number is 3. Full move number is 10. White to move.