怪物謎題
AI Escargot
11.0SE 等級
By The Hardest Sudoku Team · Last updated
1
7
9
3
2
8
9
6
5
5
3
9
1
8
2
6
4
3
1
4
7
7
3
刊出時的原始盤面（23 個已知數）。不顯示解答。
- SE 等級
- 11.0
- 作者
- Arto Inkala
- 年份
- 2006
起源與軼事
AI Escargot is Arto Inkala's puzzle (created 2006, later published as a book in 2007), named for the snail-shaped trail a solver traces through it. On release it was billed as the hardest Sudoku in the world and became the canonical reference for 'monster' difficulty, requiring chains well beyond singles and pairs.
資料來源：SudokuWiki.org (Escargot); Arto Inkala. Note: the corrected grid removes an erroneous clue at H3.
這道怪物題是如何解開的
完全用邏輯解開需要 74 步。 開局是Hidden Single，無需猜測就能落下第一手。
其中最難的一步是Forcing Chain，這決定了它的難度。
僅顯示技巧與次數——不涉及格子、數字或任何答案資訊。
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