r3k2r/p1pp1pp1/n3pq2/1pPb1P1p/4P3/B2P4/P1P1QKPn/RN3B1R w kq - 0 18
FEN state: r3k2r/p1pp1pp1/n3pq2/1pPb1P1p/4P3/B2P4/P1P1QKPn/RN3B1R w kq - 0 18 ; Best move: e4d5
The current state of the chess board is: Black rook at a8, black king at e8 and black rook at h8. Black pawn at a7, black pawn at c7, black pawn at d7, black pawn at f7 and black pawn at g7. Black knight at a6, black pawn at e6 and black queen at f6. Black pawn at b5, white pawn at c5, black bishop at d5, white pawn at f5 and black pawn at h5. White pawn at e4. White bishop at a3 and white pawn at d3. White pawn at a2, white pawn at c2, white queen at e2, white king at f2, white pawn at g2 and black knight at h2. White rook at a1, white knight at b1, white bishop at f1 and white rook at h1. Black kingside and black queenside castles are available. Half move number is 0. Full move number is 18. White to move.