r2q2r1/1bpppk2/pB5b/nQ1P2pp/4pP2/P1P5/1P1KPN1P/R4N1R b - - 3 21
FEN state: r2q2r1/1bpppk2/pB5b/nQ1P2pp/4pP2/P1P5/1P1KPN1P/R4N1R b - - 3 21 ; Best move: a6b5
The current state of the chess board is: Black rook at a8, black queen at d8 and black rook at g8. Black bishop at b7, black pawn at c7, black pawn at d7, black pawn at e7 and black king at f7. Black pawn at a6, white bishop at b6 and black bishop at h6. Black knight at a5, white queen at b5, white pawn at d5, black pawn at g5 and black pawn at h5. Black pawn at e4 and white pawn at f4. White pawn at a3 and white pawn at c3. White pawn at b2, white king at d2, white pawn at e2, white knight at f2 and white pawn at h2. White rook at a1, white knight at f1 and white rook at h1. Both players have exhausted their castles. Half move number is 3. Full move number is 21. Black to move.