rn3bn1/ppqb2r1/2k3pp/2p5/1B1pP2P/1P1P1P1N/2PN2P1/2KR1B1R b - - 1 20
FEN state: rn3bn1/ppqb2r1/2k3pp/2p5/1B1pP2P/1P1P1P1N/2PN2P1/2KR1B1R b - - 1 20 ; Best move: c5b4
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at f8 and black knight at g8. Black pawn at a7, black pawn at b7, black queen at c7, black bishop at d7 and black rook at g7. Black king at c6, black pawn at g6 and black pawn at h6. Black pawn at c5. White bishop at b4, black pawn at d4, white pawn at e4 and white pawn at h4. White pawn at b3, white pawn at d3, white pawn at f3 and white knight at h3. White pawn at c2, white knight at d2 and white pawn at g2. White king at c1, white rook at d1, white bishop at f1 and white rook at h1. Both players have exhausted their castles. Half move number is 1. Full move number is 20. Black to move.