1rb1kb1r/1p3n2/p1pp1q1n/1B3ppp/1PPP1P2/B3K2P/P2NQ1P1/R5NR b - - 4 20
FEN state: 1rb1kb1r/1p3n2/p1pp1q1n/1B3ppp/1PPP1P2/B3K2P/P2NQ1P1/R5NR b - - 4 20 ; Best move: c6b5
The current state of the chess board is: Black rook at b8, black bishop at c8, black king at e8, black bishop at f8 and black rook at h8. Black pawn at b7 and black knight at f7. Black pawn at a6, black pawn at c6, black pawn at d6, black queen at f6 and black knight at h6. White bishop at b5, black pawn at f5, black pawn at g5 and black pawn at h5. White pawn at b4, white pawn at c4, white pawn at d4 and white pawn at f4. White bishop at a3, white king at e3 and white pawn at h3. White pawn at a2, white knight at d2, white queen at e2 and white pawn at g2. White rook at a1, white knight at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 4. Full move number is 20. Black to move.