N1kn1b1r/1bp1p1pp/p2n4/1Nq2p1P/P4PP1/1P1P4/2P1P3/R2QKB1R b K - 0 18
FEN state: N1kn1b1r/1bp1p1pp/p2n4/1Nq2p1P/P4PP1/1P1P4/2P1P3/R2QKB1R b K - 0 18 ; Best move: a6b5
The current state of the chess board is: White knight at a8, black king at c8, black knight at d8, black bishop at f8 and black rook at h8. Black bishop at b7, black pawn at c7, black pawn at e7, black pawn at g7 and black pawn at h7. Black pawn at a6 and black knight at d6. White knight at b5, black queen at c5, black pawn at f5 and white pawn at h5. White pawn at a4, white pawn at f4 and white pawn at g4. White pawn at b3 and white pawn at d3. White pawn at c2 and white pawn at e2. White rook at a1, white queen at d1, white king at e1, white bishop at f1 and white rook at h1. White kingside is the only castle move available. Half move number is 0. Full move number is 18. Black to move.