r2nk1nr/4pp1p/B3P3/p1PNb1B1/q5P1/P1p4P/1PP2P2/1R1QK1R1 b k - 0 18
FEN state: r2nk1nr/4pp1p/B3P3/p1PNb1B1/q5P1/P1p4P/1PP2P2/1R1QK1R1 b k - 0 18 ; Best move: a8a6
The current state of the chess board is: Black rook at a8, black knight at d8, black king at e8, black knight at g8 and black rook at h8. Black pawn at e7, black pawn at f7 and black pawn at h7. White bishop at a6 and white pawn at e6. Black pawn at a5, white pawn at c5, white knight at d5, black bishop at e5 and white bishop at g5. Black queen at a4 and white pawn at g4. White pawn at a3, black pawn at c3 and white pawn at h3. White pawn at b2, white pawn at c2 and white pawn at f2. White rook at b1, white queen at d1, white king at e1 and white rook at g1. Black kingside is the only castle move available. Half move number is 0. Full move number is 18. Black to move.