r1b2b1r/1p1pB1p1/n1q3k1/1Bp4p/PpPPN1PP/8/5P1R/RN1Q1K2 b - - 2 21
FEN state: r1b2b1r/1p1pB1p1/n1q3k1/1Bp4p/PpPPN1PP/8/5P1R/RN1Q1K2 b - - 2 21 ; Best move: c6e4
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 b7, black pawn at d7, white bishop at e7 and black pawn at g7. Black knight at a6, black queen at c6 and black king at g6. White bishop at b5, black pawn at c5 and black pawn at h5. White pawn at a4, black pawn at b4, white pawn at c4, white pawn at d4, white knight at e4, white pawn at g4 and white pawn at h4. White pawn at f2 and white rook at h2. White rook at a1, white knight at b1, white queen at d1 and white king at f1. Both players have exhausted their castles. Half move number is 2. Full move number is 21. Black to move.