r2q1b2/1pp1pk2/2nn1ppr/p7/NPp5/P2PPPpb/R5BP/2BQ1KR1 b - - 0 20
FEN state: r2q1b2/1pp1pk2/2nn1ppr/p7/NPp5/P2PPPpb/R5BP/2BQ1KR1 b - - 0 20 ; Best move: a5b4
The current state of the chess board is: Black rook at a8, black queen at d8 and black bishop at f8. Black pawn at b7, black pawn at c7, black pawn at e7 and black king at f7. Black knight at c6, black knight at d6, black pawn at f6, black pawn at g6 and black rook at h6. Black pawn at a5. White knight at a4, white pawn at b4 and black pawn at c4. White pawn at a3, white pawn at d3, white pawn at e3, white pawn at f3, black pawn at g3 and black bishop at h3. White rook at a2, white bishop at g2 and white pawn at h2. White bishop at c1, white queen at d1, white king at f1 and white rook at g1. Both players have exhausted their castles. Half move number is 0. Full move number is 20. Black to move.