rnb3nr/5qb1/pk2p2p/1PppNPp1/1PPP4/2K1P3/1B2QP1P/RN3B1R w - - 0 18
FEN state: rnb3nr/5qb1/pk2p2p/1PppNPp1/1PPP4/2K1P3/1B2QP1P/RN3B1R w - - 0 18 ; Best move: b4c5
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black knight at g8 and black rook at h8. Black queen at f7 and black bishop at g7. Black pawn at a6, black king at b6, black pawn at e6 and black pawn at h6. White pawn at b5, black pawn at c5, black pawn at d5, white knight at e5, white pawn at f5 and black pawn at g5. White pawn at b4, white pawn at c4 and white pawn at d4. White king at c3 and white pawn at e3. White bishop at b2, white queen at e2, white pawn at f2 and white pawn at h2. White rook at a1, white knight at b1, white bishop at f1 and white rook at h1. Both players have exhausted their castles. Half move number is 0. Full move number is 18. White to move.