1rbk1r2/p1p2pbp/1p1pp3/2B3qp/3nNP2/1PK5/P1P1P1PR/R2Q1B2 b - - 0 20
FEN state: 1rbk1r2/p1p2pbp/1p1pp3/2B3qp/3nNP2/1PK5/P1P1P1PR/R2Q1B2 b - - 0 20 ; Best move: d4b5
The current state of the chess board is: Black rook at b8, black bishop at c8, black king at d8 and black rook at f8. Black pawn at a7, black pawn at c7, black pawn at f7, black bishop at g7 and black pawn at h7. Black pawn at b6, black pawn at d6 and black pawn at e6. White bishop at c5, black queen at g5 and black pawn at h5. Black knight at d4, white knight at e4 and white pawn at f4. White pawn at b3 and white king at c3. White pawn at a2, white pawn at c2, white pawn at e2, white pawn at g2 and white rook at h2. White rook at a1, white queen at d1 and white bishop at f1. Both players have exhausted their castles. Half move number is 0. Full move number is 20. Black to move.