r1bk3r/7p/n2p1n1b/1ppPpp2/4Pp2/P1PB1P1N/3N2PP/R3K2R b K - 1 21
FEN state: r1bk3r/7p/n2p1n1b/1ppPpp2/4Pp2/P1PB1P1N/3N2PP/R3K2R b K - 1 21 ; Best move: c5c4
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at d8 and black rook at h8. Black pawn at h7. Black knight at a6, black pawn at d6, black knight at f6 and black bishop at h6. Black pawn at b5, black pawn at c5, white pawn at d5, black pawn at e5 and black pawn at f5. White pawn at e4 and black pawn at f4. White pawn at a3, white pawn at c3, white bishop at d3, white pawn at f3 and white knight at h3. White knight at d2, white pawn at g2 and white pawn at h2. White rook at a1, white king at e1 and white rook at h1. White kingside is the only castle move available. Half move number is 1. Full move number is 21. Black to move.