r1bqkb2/4p3/n2pBP2/p6p/1Pp2Nr1/p1PP1P2/P4KnP/1R4QR b q - 0 23
FEN state: r1bqkb2/4p3/n2pBP2/p6p/1Pp2Nr1/p1PP1P2/P4KnP/1R4QR b q - 0 23 ; Best move: d8b6
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8, black king at e8 and black bishop at f8. Black pawn at e7. Black knight at a6, black pawn at d6, white bishop at e6 and white pawn at f6. Black pawn at a5 and black pawn at h5. White pawn at b4, black pawn at c4, white knight at f4 and black rook at g4. Black pawn at a3, white pawn at c3, white pawn at d3 and white pawn at f3. White pawn at a2, white king at f2, black knight at g2 and white pawn at h2. White rook at b1, white queen at g1 and white rook at h1. Black queenside is the only castle move available. Half move number is 0. Full move number is 23. Black to move.