r3k2r/1Q1nbp2/pqpB3p/P2n1Np1/2pp2PP/5b2/1P3K2/RN3B1R b kq - 3 21
FEN state: r3k2r/1Q1nbp2/pqpB3p/P2n1Np1/2pp2PP/5b2/1P3K2/RN3B1R b kq - 3 21 ; Best move: b6b7
The current state of the chess board is: Black rook at a8, black king at e8 and black rook at h8. White queen at b7, black knight at d7, black bishop at e7 and black pawn at f7. Black pawn at a6, black queen at b6, black pawn at c6, white bishop at d6 and black pawn at h6. White pawn at a5, black knight at d5, white knight at f5 and black pawn at g5. Black pawn at c4, black pawn at d4, white pawn at g4 and white pawn at h4. Black bishop at f3. White pawn at b2 and white king at f2. White rook at a1, white knight at b1, white bishop at f1 and white rook at h1. Black kingside and black queenside castles are available. Half move number is 3. Full move number is 21. Black to move.