r1b1kb1r/2p4p/1pn1pq1n/p2p2N1/2P1p2B/1PNP3P/P2Q1PP1/R2K1B1R b q - 1 18
FEN state: r1b1kb1r/2p4p/1pn1pq1n/p2p2N1/2P1p2B/1PNP3P/P2Q1PP1/R2K1B1R b q - 1 18 ; Best move: e4e3
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 and black pawn at h7. Black pawn at b6, black knight at c6, black pawn at e6, black queen at f6 and black knight at h6. Black pawn at a5, black pawn at d5 and white knight at g5. White pawn at c4, black pawn at e4 and white bishop at h4. White pawn at b3, white knight at c3, white pawn at d3 and white pawn at h3. White pawn at a2, white queen at d2, white pawn at f2 and white pawn at g2. White rook at a1, white king at d1, white bishop at f1 and white rook at h1. Black queenside is the only castle move available. Half move number is 1. Full move number is 18. Black to move.