1q2k1n1/rb1p2br/2p1p2p/ppP2p2/1P2PP2/N6P/Rn1PQ1P1/4KB1R b K - 1 21
FEN state: 1q2k1n1/rb1p2br/2p1p2p/ppP2p2/1P2PP2/N6P/Rn1PQ1P1/4KB1R b K - 1 21 ; Best move: b8f4
The current state of the chess board is: Black queen at b8, black king at e8 and black knight at g8. Black rook at a7, black bishop at b7, black pawn at d7, black bishop at g7 and black rook at h7. Black pawn at c6, black pawn at e6 and black pawn at h6. Black pawn at a5, black pawn at b5, white pawn at c5 and black pawn at f5. White pawn at b4, white pawn at e4 and white pawn at f4. White knight at a3 and white pawn at h3. White rook at a2, black knight at b2, white pawn at d2, white queen at e2 and white pawn at g2. White king at e1, white bishop at f1 and white rook at h1. White kingside is the only castle move available. Half move number is 1. Full move number is 21. Black to move.