r1bk2q1/4n1b1/ppnr4/1Ppppppp/2NP2QP/P1N1P3/2P2PP1/R1BK1B1R b - - 6 20
FEN state: r1bk2q1/4n1b1/ppnr4/1Ppppppp/2NP2QP/P1N1P3/2P2PP1/R1BK1B1R b - - 6 20 ; Best move: d5c4
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at d8 and black queen at g8. Black knight at e7 and black bishop at g7. Black pawn at a6, black pawn at b6, black knight at c6 and black rook at d6. White pawn at b5, black pawn at c5, black pawn at d5, black pawn at e5, black pawn at f5, black pawn at g5 and black pawn at h5. White knight at c4, white pawn at d4, white queen at g4 and white pawn at h4. White pawn at a3, white knight at c3 and white pawn at e3. White pawn at c2, white pawn at f2 and white pawn at g2. White rook at a1, white bishop at c1, white king at d1, white bishop at f1 and white rook at h1. Both players have exhausted their castles. Half move number is 6. Full move number is 20. Black to move.