r1bqk2r/p1pp4/1p2pb2/5pNp/1n1P4/P1N1K2P/RP1PP1P1/2BQ1B1R b k - 0 18
FEN state: r1bqk2r/p1pp4/1p2pb2/5pNp/1n1P4/P1N1K2P/RP1PP1P1/2BQ1B1R b k - 0 18 ; Best move: f6g5
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8, black king at e8 and black rook at h8. Black pawn at a7, black pawn at c7 and black pawn at d7. Black pawn at b6, black pawn at e6 and black bishop at f6. Black pawn at f5, white knight at g5 and black pawn at h5. Black knight at b4 and white pawn at d4. White pawn at a3, white knight at c3, white king at e3 and white pawn at h3. White rook at a2, white pawn at b2, white pawn at d2, white pawn at e2 and white pawn at g2. White bishop at c1, white queen at d1, white bishop at f1 and white rook at h1. Black kingside is the only castle move available. Half move number is 0. Full move number is 18. Black to move.