rn1qkr2/3bb2p/2p1P2n/pp1p1pp1/PP3P1P/R1P1P1P1/4NQB1/1NK4R b q - 1 21
FEN state: rn1qkr2/3bb2p/2p1P2n/pp1p1pp1/PP3P1P/R1P1P1P1/4NQB1/1NK4R b q - 1 21 ; Best move: h6g4
The current state of the chess board is: Black rook at a8, black knight at b8, black queen at d8, black king at e8 and black rook at f8. Black bishop at d7, black bishop at e7 and black pawn at h7. Black pawn at c6, white pawn at e6 and black knight at h6. Black pawn at a5, black pawn at b5, black pawn at d5, black pawn at f5 and black pawn at g5. White pawn at a4, white pawn at b4, white pawn at f4 and white pawn at h4. White rook at a3, white pawn at c3, white pawn at e3 and white pawn at g3. White knight at e2, white queen at f2 and white bishop at g2. White knight at b1, white king at c1 and white rook at h1. Black queenside is the only castle move available. Half move number is 1. Full move number is 21. Black to move.