rn2k2r/3p1qbp/p3p1Q1/2P1n1p1/3B1P2/NP1PP2N/P4KbP/R4B1R b q - 0 20
FEN state: rn2k2r/3p1qbp/p3p1Q1/2P1n1p1/3B1P2/NP1PP2N/P4KbP/R4B1R b q - 0 20 ; Best move: f7g6
The current state of the chess board is: Black rook at a8, black knight at b8, black king at e8 and black rook at h8. Black pawn at d7, black queen at f7, black bishop at g7 and black pawn at h7. Black pawn at a6, black pawn at e6 and white queen at g6. White pawn at c5, black knight at e5 and black pawn at g5. White bishop at d4 and white pawn at f4. White knight at a3, white pawn at b3, white pawn at d3, white pawn at e3 and white knight at h3. White pawn at a2, white king at f2, black bishop at g2 and white pawn at h2. White rook at a1, white bishop at f1 and white rook at h1. Black queenside is the only castle move available. Half move number is 0. Full move number is 20. Black to move.