r1b1k2r/pppnb1pp/3p4/2nP1pN1/3p4/N3PP1P/PP4P1/R1B2KR1 w kq - 0 18
FEN state: r1b1k2r/pppnb1pp/3p4/2nP1pN1/3p4/N3PP1P/PP4P1/R1B2KR1 w kq - 0 18 ; Best move: a3b5
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at e8 and black rook at h8. Black pawn at a7, black pawn at b7, black pawn at c7, black knight at d7, black bishop at e7, black pawn at g7 and black pawn at h7. Black pawn at d6. Black knight at c5, white pawn at d5, black pawn at f5 and white knight at g5. Black pawn at d4. White knight at a3, white pawn at e3, white pawn at f3 and white pawn at h3. White pawn at a2, white pawn at b2 and white pawn at g2. White rook at a1, white bishop at c1, white king at f1 and white rook at g1. Black kingside and black queenside castles are available. Half move number is 0. Full move number is 18. White to move.