r1bqk3/p1ppp1br/1N5p/np4p1/1QPP1p2/1P3NPP/P3PP2/R1BK1B1R b q - 7 15
FEN state: r1bqk3/p1ppp1br/1N5p/np4p1/1QPP1p2/1P3NPP/P3PP2/R1BK1B1R b q - 7 15 ; Best move: a7b6
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8 and black king at e8. Black pawn at a7, black pawn at c7, black pawn at d7, black pawn at e7, black bishop at g7 and black rook at h7. White knight at b6 and black pawn at h6. Black knight at a5, black pawn at b5 and black pawn at g5. White queen at b4, white pawn at c4, white pawn at d4 and black pawn at f4. White pawn at b3, white knight at f3, white pawn at g3 and white pawn at h3. White pawn at a2, white pawn at e2 and white pawn at f2. White rook at a1, white bishop at c1, white king at d1, white bishop at f1 and white rook at h1. Black queenside is the only castle move available. Half move number is 7. Full move number is 15. Black to move.