r2qkbnr/1pp1p2p/1B2b3/p2p1p2/PP1P2P1/N4P1P/2P1P1B1/3R1KNR b k - 1 20
FEN state: r2qkbnr/1pp1p2p/1B2b3/p2p1p2/PP1P2P1/N4P1P/2P1P1B1/3R1KNR b k - 1 20 ; Best move: c7b6
The current state of the chess board is: Black rook at a8, black queen at d8, black king at e8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at b7, black pawn at c7, black pawn at e7 and black pawn at h7. White bishop at b6 and black bishop at e6. Black pawn at a5, black pawn at d5 and black pawn at f5. White pawn at a4, white pawn at b4, white pawn at d4 and white pawn at g4. White knight at a3, white pawn at f3 and white pawn at h3. White pawn at c2, white pawn at e2 and white bishop at g2. White rook at d1, white king at f1, white knight at g1 and white rook at h1. Black kingside is the only castle move available. Half move number is 1. Full move number is 20. Black to move.