1rB2bnr/1p4k1/2p1pqp1/p2B4/1n1P1p1p/P5PP/2PK1PR1/RNBQ2N1 b - - 4 20
FEN state: 1rB2bnr/1p4k1/2p1pqp1/p2B4/1n1P1p1p/P5PP/2PK1PR1/RNBQ2N1 b - - 4 20 ; Best move: b4d5
The current state of the chess board is: Black rook at b8, white bishop at c8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at b7 and black king at g7. Black pawn at c6, black pawn at e6, black queen at f6 and black pawn at g6. Black pawn at a5 and white bishop at d5. Black knight at b4, white pawn at d4, black pawn at f4 and black pawn at h4. White pawn at a3, white pawn at g3 and white pawn at h3. White pawn at c2, white king at d2, white pawn at f2 and white rook at g2. White rook at a1, white knight at b1, white bishop at c1, white queen at d1 and white knight at g1. Both players have exhausted their castles. Half move number is 4. Full move number is 20. Black to move.