魔王谜题
AI Escargot
11.0SE 等级
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
谜题按发布时的原样呈现（23 个已知数）。不展示答案。
- SE 等级
- 11.0
- 作者
- Arto Inkala
- 年份
- 2006
起源与传说
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.
来源：SudokuWiki.org (Escargot); Arto Inkala. Note: the corrected grid removes an erroneous clue at H3.
这道怪物题是如何解开的
完全用逻辑解开需要 74 步。 开局是Hidden Single，无需猜测就能落下第一手。
其中最难的一步是Forcing Chain，这决定了它的难度。
仅显示技巧与次数——不涉及格子、数字或任何答案信息。
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