rnbq2kr/ppp4p/3n4/3pPpp1/PPP4P/K2Pb3/R3P1P1/2NQ1BNR b - - 0 21
FEN state: rnbq2kr/ppp4p/3n4/3pPpp1/PPP4P/K2Pb3/R3P1P1/2NQ1BNR b - - 0 21 ; Best move: a7a5
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black queen at d8, black king at g8 and black rook at h8. Black pawn at a7, black pawn at b7, black pawn at c7 and black pawn at h7. Black knight at d6. Black pawn at d5, white pawn at e5, black pawn at f5 and black pawn at g5. White pawn at a4, white pawn at b4, white pawn at c4 and white pawn at h4. White king at a3, white pawn at d3 and black bishop at e3. White rook at a2, white pawn at e2 and white pawn at g2. White knight at c1, white queen at d1, 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.