1rb2br1/3pnk2/n3p3/pp4pp/2P3p1/3pP1RB/PP1Q1K1P/RNB1N3 b - - 0 21
FEN state: 1rb2br1/3pnk2/n3p3/pp4pp/2P3p1/3pP1RB/PP1Q1K1P/RNB1N3 b - - 0 21 ; Best move: b5c4
The current state of the chess board is: Black rook at b8, black bishop at c8, black bishop at f8 and black rook at g8. Black pawn at d7, black knight at e7 and black king at f7. Black knight at a6 and black pawn at e6. Black pawn at a5, black pawn at b5, black pawn at g5 and black pawn at h5. White pawn at c4 and black pawn at g4. Black pawn at d3, white pawn at e3, white rook at g3 and white bishop at h3. White pawn at a2, white pawn at b2, white queen at d2, white king at f2 and white pawn at h2. White rook at a1, white knight at b1, white bishop at c1 and white knight at e1. Both players have exhausted their castles. Half move number is 0. Full move number is 21. Black to move.