怪物謎題
Easter Monster
11.0SE 等級
By The Hardest Sudoku Team · Last updated
1
2
9
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9
3
7
8
5
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3
9
8
2
1
刊出時的原始盤面（21 個已知數）。不顯示解答。
- SE 等級
- 11.0
- 作者
- JPF (forum.enjoysudoku.com)
- 年份
- 2007
起源與軼事
Easter Monster is one of the most famous symmetric monsters, posted around Easter 2007. Its striking diagonal clue pattern made it a touchstone puzzle and spurred research into specialized techniques (Naked/Hidden Double Loops, the 'SK Loop') that exploit its structure. It remains a classic example of high-SE-grade difficulty.
資料來源：SudokuSnake.com (Easter Monster); forum.enjoysudoku.com (Easter Monster thread).
這道怪物題是如何解開的
完全用邏輯解開需要 94 步。 開局是Forcing Chain，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。
| 技巧 | 步數 |
|---|---|
| Naked Single | 52 |
| Hidden Single | 8 |
| Claiming (Locked Candidates) | 1 |
| Pointing (Locked Candidates) | 3 |
| Naked Pair | 5 |
| Forcing Chain | 25 |
僅顯示技巧與次數——不涉及格子、數字或任何答案資訊。
查看完整技巧階梯