4bb2/prpkqp1p/2np2r1/Pp2p1p1/1P1PP3/R1P1BPPP/5K2/1N2QBNR b - - 0 21
FEN state: 4bb2/prpkqp1p/2np2r1/Pp2p1p1/1P1PP3/R1P1BPPP/5K2/1N2QBNR b - - 0 21 ; Best move: e5d4
The current state of the chess board is: Black bishop at e8 and black bishop at f8. Black pawn at a7, black rook at b7, black pawn at c7, black king at d7, black queen at e7, black pawn at f7 and black pawn at h7. Black knight at c6, black pawn at d6 and black rook at g6. White pawn at a5, black pawn at b5, black pawn at e5 and black pawn at g5. White pawn at b4, white pawn at d4 and white pawn at e4. White rook at a3, white pawn at c3, white bishop at e3, white pawn at f3, white pawn at g3 and white pawn at h3. White king at f2. White knight at b1, white queen at e1, white bishop at f1, white knight at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 0. Full move number is 21. Black to move.