2b2bnr/5npp/rk1p4/pp1p1pPP/P1p2P2/N1N2P2/RPPBR3/1Q1K1B2 b - - 1 21
FEN state: 2b2bnr/5npp/rk1p4/pp1p1pPP/P1p2P2/N1N2P2/RPPBR3/1Q1K1B2 b - - 1 21 ; Best move: b5b4
The current state of the chess board is: Black bishop at c8, black bishop at f8, black knight at g8 and black rook at h8. Black knight at f7, black pawn at g7 and black pawn at h7. Black rook at a6, black king at b6 and black pawn at d6. Black pawn at a5, black pawn at b5, black pawn at d5, black pawn at f5, white pawn at g5 and white pawn at h5. White pawn at a4, black pawn at c4 and white pawn at f4. White knight at a3, white knight at c3 and white pawn at f3. White rook at a2, white pawn at b2, white pawn at c2, white bishop at d2 and white rook at e2. White queen at b1, white king at d1 and white bishop at f1. Both players have exhausted their castles. Half move number is 1. Full move number is 21. Black to move.