r1bk1bnr/pp2p1pp/2p1p3/3q1p2/1P6/B2P2PB/P1PP1P1P/RN1QK1R1 w Q - 1 10
FEN state: r1bk1bnr/pp2p1pp/2p1p3/3q1p2/1P6/B2P2PB/P1PP1P1P/RN1QK1R1 w Q - 1 10 ; Best move: a3b2
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at d8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at a7, black pawn at b7, black pawn at e7, black pawn at g7 and black pawn at h7. Black pawn at c6 and black pawn at e6. Black queen at d5 and black pawn at f5. White pawn at b4. White bishop at a3, white pawn at d3, white pawn at g3 and white bishop at h3. White pawn at a2, white pawn at c2, white pawn at d2, white pawn at f2 and white pawn at h2. White rook at a1, white knight at b1, white queen at d1, white king at e1 and white rook at g1. White queenside is the only castle move available. Half move number is 1. Full move number is 10. White to move.