rnb4r/3pbk2/4p3/pq5p/1pP2PnP/N2P3K/PP1BN1P1/R5QR b - - 1 21
FEN state: rnb4r/3pbk2/4p3/pq5p/1pP2PnP/N2P3K/PP1BN1P1/R5QR b - - 1 21 ; Best move: b5f5
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8 and black rook at h8. Black pawn at d7, black bishop at e7 and black king at f7. Black pawn at e6. Black pawn at a5, black queen at b5 and black pawn at h5. Black pawn at b4, white pawn at c4, white pawn at f4, black knight at g4 and white pawn at h4. White knight at a3, white pawn at d3 and white king at h3. White pawn at a2, white pawn at b2, white bishop at d2, white knight at e2 and white pawn at g2. White rook at a1, white queen at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 1. Full move number is 21. Black to move.