r1b1kb1r/2pq2p1/4p2n/pB1p1p1p/1P1P2n1/N3P2P/P1PQNPP1/1R2K2R b k - 6 18
FEN state: r1b1kb1r/2pq2p1/4p2n/pB1p1p1p/1P1P2n1/N3P2P/P1PQNPP1/1R2K2R b k - 6 18 ; Best move: c7c6
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at e8, black bishop at f8 and black rook at h8. Black pawn at c7, black queen at d7 and black pawn at g7. Black pawn at e6 and black knight at h6. Black pawn at a5, white bishop at b5, black pawn at d5, black pawn at f5 and black pawn at h5. White pawn at b4, white pawn at d4 and black knight at g4. White knight at a3, white pawn at e3 and white pawn at h3. White pawn at a2, white pawn at c2, white queen at d2, white knight at e2, white pawn at f2 and white pawn at g2. White rook at b1, white king at e1 and white rook at h1. Black kingside is the only castle move available. Half move number is 6. Full move number is 18. Black to move.