專家奇偶數獨
陰影儲存格必須包含奇數；非陰影儲存格包含偶數。奇偶線索將候選數減半，使每個放置都至關重要。免費線上。
專家 奇偶數獨。本站最難的奇偶限制謎題——奇偶計數， X-Wings，且需要多步驟強制鏈。無需猜測。
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什麼是 奇數 / 偶數數獨？
難度
★★★☆☆
3/5
約束類型
儲存格關係
典型給定數
20–26
平均解題時間（專家）
50分鐘
解題技巧：專家 等級
| 技巧 | 描述 | 等級 |
|---|---|---|
| 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. | 初學者 |
| Parity Counting per Box | Count how many odd-marked and even-marked cells are in each box to verify the digit distribution is achievable. | 中級 |
| 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. | 中級 |
| Parity X-Wing | When parity restricts a digit to exactly two rows and two columns, form a parity-based X-Wing for cross-elimination. | 進階 |
在 專家 需要掌握的技巧
- X-Wing 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.
依難度平均解題時間
簡單
6分鐘
中等
14分鐘
困難
28分鐘
專家
50分鐘
想要規則、策略和解題步驟的完整演練嗎？
如何遊玩 奇數 / 偶數數獨 →
相關變體
大於數獨
Builds on value reasoning — inequality chains bound cells from both ends much like parity halves them.
Kropki數獨
Moves from cell properties to cell relationships: dots encode consecutive and doubled neighbours.
連續數獨
Neighbour-difference logic with a strong negative constraint — a natural next step from parity counting.
常見問題 — 專家 奇偶數獨
還有問題？請參閱完整 奇偶數獨指南.