1r3knr/pb1B3p/1pnp1b2/2p3p1/P2NPpP1/3PB2P/1PP1KP2/R2Q2NR b - - 4 20
FEN state: 1r3knr/pb1B3p/1pnp1b2/2p3p1/P2NPpP1/3PB2P/1PP1KP2/R2Q2NR b - - 4 20 ; Best move: c5d4
The current state of the chess board is: Black rook at b8, black king at f8, black knight at g8 and black rook at h8. Black pawn at a7, black bishop at b7, white bishop at d7 and black pawn at h7. Black pawn at b6, black knight at c6, black pawn at d6 and black bishop at f6. Black pawn at c5 and black pawn at g5. White pawn at a4, white knight at d4, white pawn at e4, black pawn at f4 and white pawn at g4. White pawn at d3, white bishop at e3 and white pawn at h3. White pawn at b2, white pawn at c2, white king at e2 and white pawn at f2. White rook at a1, white queen at d1, 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.