r3kbr1/6pp/bpn1p3/pB1p2B1/3pP3/PP5N/2PN3P/RQ3K1R b - - 1 21
FEN state: r3kbr1/6pp/bpn1p3/pB1p2B1/3pP3/PP5N/2PN3P/RQ3K1R b - - 1 21 ; Best move: a6b5
The current state of the chess board is: Black rook at a8, black king at e8, black bishop at f8 and black rook at g8. Black pawn at g7 and black pawn at h7. Black bishop at a6, black pawn at b6, black knight at c6 and black pawn at e6. Black pawn at a5, white bishop at b5, black pawn at d5 and white bishop at g5. Black pawn at d4 and white pawn at e4. White pawn at a3, white pawn at b3 and white knight at h3. White pawn at c2, white knight at d2 and white pawn at h2. White rook at a1, white queen at b1, white king at f1 and white rook at h1. Both players have exhausted their castles. Half move number is 1. Full move number is 21. Black to move.