4
7
2
4
6
8
6
3
7
9
8
5
3
7
4
7
8
6
9
5

这个数独谜题有 6 个步骤，它使用 Hidden Single, Locked Candidates Type 1 (Pointing), Give Up 技术解决。

Hidden Single 解释
Locked Candidates 解释
尝试解决

解决步骤：

  1. 排 2 / 柱子 7 → 4 (Hidden Single)
  2. 排 3 / 柱子 6 → 7 (Hidden Single)
  3. Locked Candidates Type 1 (Pointing): 2 in b3 => r3c123<>2
  4. Locked Candidates Type 1 (Pointing): 3 in b9 => r9c56<>3
  5. Locked Candidates Type 1 (Pointing): 4 in b9 => r9c3<>4
  6. Give Up: Don't know how to proceed!
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