r1b1r3/p2pkp1p/n1p4n/1qP3pP/4p3/bP3RPN/1B1PPP2/RN1QKB2 w Q - 3 15
FEN state: r1b1r3/p2pkp1p/n1p4n/1qP3pP/4p3/bP3RPN/1B1PPP2/RN1QKB2 w Q - 3 15 ; Best move: b1a3
The current state of the chess board is: Black rook at a8, black bishop at c8 and black rook at e8. Black pawn at a7, black pawn at d7, black king at e7, black pawn at f7 and black pawn at h7. Black knight at a6, black pawn at c6 and black knight at h6. Black queen at b5, white pawn at c5, black pawn at g5 and white pawn at h5. Black pawn at e4. Black bishop at a3, white pawn at b3, white rook at f3, white pawn at g3 and white knight at h3. White bishop at b2, white pawn at d2, white pawn at e2 and white pawn at f2. 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 15. White to move.