1r1k3r/p1pb2p1/nq3n1p/2bP1p2/1P3pP1/2NBPN2/P2PK2P/R1BQ3R w - - 3 18
FEN state: 1r1k3r/p1pb2p1/nq3n1p/2bP1p2/1P3pP1/2NBPN2/P2PK2P/R1BQ3R w - - 3 18 ; Best move: b4c5
The current state of the chess board is: Black rook at b8, black king at d8 and black rook at h8. Black pawn at a7, black pawn at c7, black bishop at d7 and black pawn at g7. Black knight at a6, black queen at b6, black knight at f6 and black pawn at h6. Black bishop at c5, white pawn at d5 and black pawn at f5. White pawn at b4, black pawn at f4 and white pawn at g4. White knight at c3, white bishop at d3, white pawn at e3 and white knight at f3. White pawn at a2, white pawn at d2, white king at e2 and white pawn at h2. White rook at a1, white bishop at c1, white queen at d1 and white rook at h1. Both players have exhausted their castles. Half move number is 3. Full move number is 18. White to move.