rnb1q2r/p1ppb1k1/5np1/1p2ppNp/PP2P2P/BR6/2PP1PP1/RN1QKB2 w Q - 3 13
FEN state: rnb1q2r/p1ppb1k1/5np1/1p2ppNp/PP2P2P/BR6/2PP1PP1/RN1QKB2 w Q - 3 13 ; Best move: a4b5
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black queen at e8 and black rook at h8. Black pawn at a7, black pawn at c7, black pawn at d7, black bishop at e7 and black king at g7. Black knight at f6 and black pawn at g6. Black pawn at b5, black pawn at e5, black pawn at f5, white knight at g5 and black pawn at h5. White pawn at a4, white pawn at b4, white pawn at e4 and white pawn at h4. White bishop at a3 and white rook at b3. White pawn at c2, white pawn at d2, white pawn at f2 and white pawn at g2. White rook at a1, white knight at b1, white queen at d1, 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 13. White to move.