rnb1kb1r/2p1p3/4qn2/p4pPp/1P1p1PP1/N3P3/PQ1PB3/R1BK2NR b q - 1 23
FEN state: rnb1kb1r/2p1p3/4qn2/p4pPp/1P1p1PP1/N3P3/PQ1PB3/R1BK2NR b q - 1 23 ; Best move: f6g4
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black king at e8, black bishop at f8 and black rook at h8. Black pawn at c7 and black pawn at e7. Black queen at e6 and black knight at f6. Black pawn at a5, black pawn at f5, white pawn at g5 and black pawn at h5. White pawn at b4, black pawn at d4, white pawn at f4 and white pawn at g4. White knight at a3 and white pawn at e3. White pawn at a2, white queen at b2, white pawn at d2 and white bishop at e2. White rook at a1, white bishop at c1, white king at d1, white knight at g1 and white rook at h1. Black queenside is the only castle move available. Half move number is 1. Full move number is 23. Black to move.