1n2k1nr/r1p2p2/ppb1pq2/1B1p2pp/1P3Q2/P3P1P1/2PP1P1P/R1bK2NR b k - 2 20
FEN state: 1n2k1nr/r1p2p2/ppb1pq2/1B1p2pp/1P3Q2/P3P1P1/2PP1P1P/R1bK2NR b k - 2 20 ; Best move: g5f4
The current state of the chess board is: Black knight at b8, black king at e8, black knight at g8 and black rook at h8. Black rook at a7, black pawn at c7 and black pawn at f7. Black pawn at a6, black pawn at b6, black bishop at c6, black pawn at e6 and black queen at f6. White bishop at b5, black pawn at d5, black pawn at g5 and black pawn at h5. White pawn at b4 and white queen at f4. White pawn at a3, white pawn at e3 and white pawn at g3. White pawn at c2, white pawn at d2, white pawn at f2 and white pawn at h2. White rook at a1, black bishop at c1, white king at d1, white knight at g1 and white rook at h1. Black kingside is the only castle move available. Half move number is 2. Full move number is 20. Black to move.