r1bq3r/p2kpp2/n1pp4/1p2b1pp/PP1P1B1Q/N1PKnP2/4P1PP/R4BR1 b - - 2 20
FEN state: r1bq3r/p2kpp2/n1pp4/1p2b1pp/PP1P1B1Q/N1PKnP2/4P1PP/R4BR1 b - - 2 20 ; Best move: e5f4
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8 and black rook at h8. Black pawn at a7, black king at d7, black pawn at e7 and black pawn at f7. Black knight at a6, black pawn at c6 and black pawn at d6. Black pawn at b5, black bishop at e5, black pawn at g5 and black pawn at h5. White pawn at a4, white pawn at b4, white pawn at d4, white bishop at f4 and white queen at h4. White knight at a3, white pawn at c3, white king at d3, black knight at e3 and white pawn at f3. White pawn at e2, white pawn at g2 and white pawn at h2. White rook at a1, white bishop at f1 and white rook at g1. Both players have exhausted their castles. Half move number is 2. Full move number is 20. Black to move.