1rb1kb1r/p2pp2p/1q5n/Q3P1p1/p2p1P1P/2N5/1PP1NP1R/R1B1KB2 w Q - 3 17
FEN state: 1rb1kb1r/p2pp2p/1q5n/Q3P1p1/p2p1P1P/2N5/1PP1NP1R/R1B1KB2 w Q - 3 17 ; Best move: a5b6
The current state of the chess board is: Black rook at b8, black bishop at c8, black king at e8, black bishop at f8 and black rook at h8. Black pawn at a7, black pawn at d7, black pawn at e7 and black pawn at h7. Black queen at b6 and black knight at h6. White queen at a5, white pawn at e5 and black pawn at g5. Black pawn at a4, black pawn at d4, white pawn at f4 and white pawn at h4. White knight at c3. White pawn at b2, white pawn at c2, white knight at e2, white pawn at f2 and white rook at h2. White rook at a1, white bishop at c1, white king at e1 and white bishop at f1. White queenside is the only castle move available. Half move number is 3. Full move number is 17. White to move.