5br1/pbqpkpp1/2r5/1p1Pp2p/1pPB1PnP/N2R2P1/PP2P3/4KBNR w K - 1 18
FEN state: 5br1/pbqpkpp1/2r5/1p1Pp2p/1pPB1PnP/N2R2P1/PP2P3/4KBNR w K - 1 18 ; Best move: a3b5
The current state of the chess board is: Black bishop at f8 and black rook at g8. Black pawn at a7, black bishop at b7, black queen at c7, black pawn at d7, black king at e7, black pawn at f7 and black pawn at g7. Black rook at c6. Black pawn at b5, white pawn at d5, black pawn at e5 and black pawn at h5. Black pawn at b4, white pawn at c4, white bishop at d4, white pawn at f4, black knight at g4 and white pawn at h4. White knight at a3, white rook at d3 and white pawn at g3. White pawn at a2, white pawn at b2 and white pawn at e2. White king at e1, white bishop at f1, white knight at g1 and white rook at h1. White kingside is the only castle move available. Half move number is 1. Full move number is 18. White to move.