1rq1kbr1/1pp1pppp/1p6/5b2/3P2nP/6PR/PBPNPn2/R2QKBN1 w Q - 12 18
FEN state: 1rq1kbr1/1pp1pppp/1p6/5b2/3P2nP/6PR/PBPNPn2/R2QKBN1 w Q - 12 18 ; Best move: d1c1
The current state of the chess board is: Black rook at b8, black queen at c8, black king at e8, black bishop at f8 and black rook at g8. Black pawn at b7, black pawn at c7, black pawn at e7, black pawn at f7, black pawn at g7 and black pawn at h7. Black pawn at b6. Black bishop at f5. White pawn at d4, black knight at g4 and white pawn at h4. White pawn at g3 and white rook at h3. White pawn at a2, white bishop at b2, white pawn at c2, white knight at d2, white pawn at e2 and black knight at f2. White rook at a1, 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 12. Full move number is 18. White to move.