r4knr/5p1p/2n1b1pb/1ppp3q/2PP1PP1/3K3N/PB2PNBP/1RQ4R b - - 6 21
FEN state: r4knr/5p1p/2n1b1pb/1ppp3q/2PP1PP1/3K3N/PB2PNBP/1RQ4R b - - 6 21 ; Best move: b5c4
The current state of the chess board is: Black rook at a8, black king at f8, black knight at g8 and black rook at h8. Black pawn at f7 and black pawn at h7. Black knight at c6, black bishop at e6, black pawn at g6 and black bishop at h6. Black pawn at b5, black pawn at c5, black pawn at d5 and black queen at h5. White pawn at c4, white pawn at d4, white pawn at f4 and white pawn at g4. White king at d3 and white knight at h3. White pawn at a2, white bishop at b2, white pawn at e2, white knight at f2, white bishop at g2 and white pawn at h2. White rook at b1, white queen at c1 and white rook at h1. Both players have exhausted their castles. Half move number is 6. Full move number is 21. Black to move.