r1b2b1r/p5pp/B3k2n/1pp2p2/1P1ppP2/1Q4K1/P1P3P1/RNB3N1 b - - 1 21
FEN state: r1b2b1r/p5pp/B3k2n/1pp2p2/1P1ppP2/1Q4K1/P1P3P1/RNB3N1 b - - 1 21 ; Best move: c5c4
The current state of the chess board is: Black rook at a8, black bishop at c8, black bishop at f8 and black rook at h8. Black pawn at a7, black pawn at g7 and black pawn at h7. White bishop at a6, black king at e6 and black knight at h6. Black pawn at b5, black pawn at c5 and black pawn at f5. White pawn at b4, black pawn at d4, black pawn at e4 and white pawn at f4. White queen at b3 and white king at g3. White pawn at a2, white pawn at c2 and white pawn at g2. White rook at a1, white knight at b1, white bishop at c1 and white knight at g1. Both players have exhausted their castles. Half move number is 1. Full move number is 21. Black to move.