r1b1kb1r/1p3p1p/6qn/n1pPp1p1/P5PP/2NPPP2/P1K1Q1B1/R1B3NR b k - 0 21
FEN state: r1b1kb1r/1p3p1p/6qn/n1pPp1p1/P5PP/2NPPP2/P1K1Q1B1/R1B3NR b k - 0 21 ; Best move: g5h4
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at e8, black bishop at f8 and black rook at h8. Black pawn at b7, black pawn at f7 and black pawn at h7. Black queen at g6 and black knight at h6. Black knight at a5, black pawn at c5, white pawn at d5, black pawn at e5 and black pawn at g5. White pawn at a4, white pawn at g4 and white pawn at h4. White knight at c3, white pawn at d3, white pawn at e3 and white pawn at f3. White pawn at a2, white king at c2, white queen at e2 and white bishop at g2. White rook at a1, white bishop at c1, white knight at g1 and white rook at h1. Black kingside is the only castle move available. Half move number is 0. Full move number is 21. Black to move.