3
8
6
7
5
4
9
6
9
2
1
8
7
2
3
4
9
1
5
8
7

这个数独谜题有 4 个步骤，它使用 Hidden Single, Locked Triple, 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 6 / 柱子 6 → 7 (Hidden Single)
  2. Locked Triple: 2,3,6 in r3c456 => r1c5,r3c13<>2, r2c4,r3c7<>3
  3. Locked Candidates Type 1 (Pointing): 4 in b3 => r6789c7<>4
  4. Give Up: Don't know how to proceed!
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