专家 奇偶数独
阴影单元格必须包含奇数；非阴影单元格包含偶数。奇偶线索将候选数减半，使每个放置都至关重要。免费在线。
专家 奇偶数独。网站上最难的奇偶约束谜题——奇偶计数， X翼，并且需要多步强制链。无需猜测。
8
4
6
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7
2
1
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7
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2
8
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1
9
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什么是奇数 / 偶数数独？
难度
★★★☆☆
3/5
约束类型
单元格关系
典型给定数
20–26
平均解题 (专家)
50 分钟
专家 级别的解题技巧
| 技巧 | 描述 | 级别 |
|---|---|---|
| Immediate Candidate Halving | Marked cells instantly reduce to 5 odd candidates (1,3,5,7,9) or 4 even candidates (2,4,6,8). Apply this before any other technique. | 初级 |
| Parity Counting per Box | Count how many odd-marked and even-marked cells are in each box to verify the digit distribution is achievable. | 中级 |
| Parity-Chain Elimination | If a row must contain exactly four even digits, and three positions are already even-marked, the fourth must come from the remaining unmarked cells. | 中级 |
| Parity X-Wing | When parity restricts a digit to exactly two rows and two columns, form a parity-based X-Wing for cross-elimination. | 高级 |
在专家需要掌握的技巧
- X翼技巧 — Expert grids shade fewer cells, but every shaded cell still halves a fish's candidate set — anchor your X-Wing rows on the parity marks that survive.
- Swordfish technique — A Swordfish on an even digit only needs to cover even-legal cells, which shrinks the pattern space dramatically — expert odd/even endgames usually hinge on one.
按难度划分的平均解题时间
简单
6 分钟
中等
14 分钟
困难
28 分钟
专家
50 分钟
想要规则、策略和解题步骤的完整指南吗？
如何玩奇数 / 偶数数独 →
相关变体
大于数独
Builds on value reasoning — inequality chains bound cells from both ends much like parity halves them.
黑白点数独
Moves from cell properties to cell relationships: dots encode consecutive and doubled neighbours.
连续数独
Neighbour-difference logic with a strong negative constraint — a natural next step from parity counting.
常见问题 — 专家 奇偶数独
更多问题？请参阅完整 奇偶数独指南.