rn2k2r/5p1p/PpP2ppb/P4q1b/1B1p1P2/6PP/2P4R/RN2KB2 b kq - 4 21
FEN state: rn2k2r/5p1p/PpP2ppb/P4q1b/1B1p1P2/6PP/2P4R/RN2KB2 b kq - 4 21 ; Best move: f5e4
The current state of the chess board is: Black rook at a8, black knight at b8, black king at e8 and black rook at h8. Black pawn at f7 and black pawn at h7. White pawn at a6, black pawn at b6, white pawn at c6, black pawn at f6, black pawn at g6 and black bishop at h6. White pawn at a5, black queen at f5 and black bishop at h5. White bishop at b4, black pawn at d4 and white pawn at f4. White pawn at g3 and white pawn at h3. White pawn at c2 and white rook at h2. White rook at a1, white knight at b1, white king at e1 and white bishop at f1. Black kingside and black queenside castles are available. Half move number is 4. Full move number is 21. Black to move.