1n1qkb1r/1ppbp1pp/5p1n/1N1p3P/1p1P1PP1/7R/r1P1P1B1/R1BQK1N1 w Q - 0 13
FEN state: 1n1qkb1r/1ppbp1pp/5p1n/1N1p3P/1p1P1PP1/7R/r1P1P1B1/R1BQK1N1 w Q - 0 13 ; Best move: a1a2
The current state of the chess board is: Black knight at b8, black queen at d8, black king at e8, black bishop at f8 and black rook at h8. Black pawn at b7, black pawn at c7, black bishop at d7, black pawn at e7, black pawn at g7 and black pawn at h7. Black pawn at f6 and black knight at h6. White knight at b5, black pawn at d5 and white pawn at h5. Black pawn at b4, white pawn at d4, white pawn at f4 and white pawn at g4. White rook at h3. Black rook at a2, white pawn at c2, white pawn at e2 and white bishop at g2. White rook at a1, white bishop at c1, white queen at d1, white king at e1 and white knight at g1. White queenside is the only castle move available. Half move number is 0. Full move number is 13. White to move.