홀수/짝수 스도쿠
9
5
4
2
6
3
1
4
4
1
8
5
6
8
7
5
2
4
1
2
4
5
7
6
4
3
9
3
9
9
6
2
3
1
3
7
6
2
홀수/짝수 스도쿠 플레이 방법
표준 스도쿠 규칙이 적용됩니다. 보라색 테두리 셀(홀수)은 1, 3, 5, 7, 9를 포함해야 합니다. 노란색 셀(짝수)은 2, 4, 6, 8을 포함해야 합니다. 잘못된 패리티 숫자는 실수로 간주됩니다.
전체 가이드 →
Shaded cells는 홀수 digits를 포함해야 합니다; circles는 짝수 digits를 포함해야 합니다.
홀수 / 짝수 스도쿠이란 무엇인가요?
Odd/Even Sudoku는 특정 cell을 odd (종종 회색 음영) 또는 even (종종 원 표시)으로 표시합니다. Odd cell은 1, 3, 5, 7, 9 중 하나를 포함해야 하고, even cell은 2, 4, 6, 8 중 하나를 포함해야 합니다. 이는 표시된 cell의 candidate set을 즉시 절반으로 줄여, 특정 digit을 제공하지 않고도 강력한 제한을 만듭니다.
한눈에
| 제약 유형 | 셀 관계 |
| 일반적인 주어진 숫자 | 20–26 |
| 난이도 등급 | ★★★☆☆ 3/5 |
| 평균 풀이 시간 — 쉬움 | 6 분 |
| 평균 풀이 시간 — 중급 | 14 분 |
| 평균 풀이 시간 — 어려움 | 28 분 |
| 평균 풀이 시간 — 전문가 | 50 분 |
홀수 / 짝수 스도쿠 푸는 방법
| 기법 | 기능 | 레벨 |
|---|---|---|
| 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. | 고급 |
| Parity Counting per Box | Count how many odd-marked and even-marked cells are in each box to verify the digit distribution is achievable. | 고급 |
| 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. | 고급 |
| Parity X-Wing | When parity restricts a digit to exactly two rows and two columns, form a parity-based X-Wing for cross-elimination. | 고급 |
평균 풀이 시간
쉬움
6 분
중급
14 분
어려움
28 분
전문가
50 분
자주 묻는 질문
Odd/Even Sudoku란 무엇인가요?
Odd/Even Sudoku is a variant where some cells are shaded to indicate whether they must hold an odd or even digit. Purple-ringed cells must hold odd digits (1, 3, 5, 7, or 9). Yellow-shaded cells must hold even digits (2, 4, 6, or 8). Standard Sudoku rules apply to all cells.
What is parity in Sudoku?
Parity refers to whether a number is odd or even. In Odd/Even Sudoku, you can immediately halve the candidate list for any shaded cell. An odd cell can only hold 1, 3, 5, 7, or 9. An even cell can only hold 2, 4, 6, or 8. Combined with row, column, and box constraints, parity constraints make early placements much faster.
How do parity markings help solving?
Shaded cells eliminate half the digit range immediately. If a row already contains three odd digits and has an odd-marked cell remaining, that cell is heavily constrained. Counting odd vs even cells in each row, column, and box often reveals hidden singles that would be invisible without the parity markings.
Is Odd/Even Sudoku harder than regular Sudoku?
At easy and medium difficulty, it is comparable to or easier than classic Sudoku because parity markings provide immediate candidate reductions. Hard and expert Odd/Even puzzles use sparser markings and fewer given digits, making them comparable in difficulty to hard classic Sudoku.
What is the best first move in Odd/Even Sudoku?
Scan each row, column, and box and count how many odd and even slots remain versus how many odd and even digits are still unplaced. When only one cell in a row can hold an odd digit, that cell must contain an odd digit from the remaining candidates — this is a parity-based hidden single.
How long does Odd/Even Sudoku take to solve?
Easy puzzles take 5–15 minutes. Medium puzzles run 15–30 minutes. Hard puzzles average 30–60 minutes and expert puzzles can take 60–90 minutes. Parity-based hidden singles are the primary acceleration technique that distinguishes fast solvers.