팰린드롬 스도쿠
8
2
3
1
4
1
5
5
4
9
7
6
7
2
2
1
7
9
9
5
1
8
2
7
9
4
5
6
4
1
2
8
6
2
7
1
9
4
팰린드롬 스도쿠 플레이 방법
표준 스도쿠 규칙이 적용됩니다. 각 회색 선은 회문입니다 - 숫자 순서가 양쪽 끝에서 동일하게 읽힙니다. 5셀 선이 3,7,5,7,3으로 읽히면 위치 1 = 위치 5, 위치 2 = 위치 4입니다.
전체 가이드 →
라인을 따라 있는 숫자 시퀀스는 앞으로 읽으나 뒤로 읽으나 같습니다.
팰린드롬 스도쿠이란 무엇인가요?
Palindrome Sudoku는 grid에 digit sequence가 palindrome이어야 하는 선을 표시합니다 — 양방향으로 동일하게 읽힙니다. 선에 cell A-B-C-D-E가 있으면, A=E이고 B=D이며, C는 중앙 digit입니다. 이는 동일한 값을 공유해야 하는 cell 쌍을 생성하여, grid 전체에 강력한 동등 제약으로 작용합니다.
한눈에
| 제약 유형 | 선 제약 조건 |
| 일반적인 주어진 숫자 | 20–28 |
| 난이도 등급 | ★★★☆☆ 3/5 |
| 평균 풀이 시간 — 쉬움 | 7 분 |
| 평균 풀이 시간 — 중급 | 16 분 |
| 평균 풀이 시간 — 어려움 | 32 분 |
| 평균 풀이 시간 — 전문가 | 58 분 |
팰린드롬 스도쿠 푸는 방법
| 기법 | 기능 | 레벨 |
|---|---|---|
| Mirror Pair Identification | In a palindrome of length L, cell i and cell L+1−i must share the same digit. Identify all mirror pairs before solving. | 고급 |
| Centre Cell Freedom | The central cell of an odd-length palindrome has no mirror constraint — it is only restricted by standard row/column/box rules. | 고급 |
| Mirror Propagation | Once one cell of a mirror pair is determined, immediately set its partner to the same value. | 고급 |
| Multi-Palindrome Intersection | If two palindromes share a cell, that cell must satisfy both palindrome relationships simultaneously. | 고급 |
평균 풀이 시간
쉬움
7 분
중급
16 분
어려움
32 분
전문가
58 분
자주 묻는 질문
Palindrome Sudoku란 무엇인가요?
Palindrome Sudoku is a variant where grey lines are drawn across the grid. Every grey line must read the same forwards and backwards — meaning the first cell mirrors the last, the second mirrors the second-to-last, and so on. Standard Sudoku rules apply throughout.
How does the palindrome constraint work?
For any palindrome line, cell positions are mirrored around the centre. On a 6-cell line, cells 1 and 6 hold the same digit, cells 2 and 5 hold the same digit, and cells 3 and 4 hold the same digit. This immediately links distant parts of the grid — placing a digit at one end fixes the digit at the other end.
Can palindrome lines have repeated digits?
Yes, palindrome lines inherently require digit repetition — each mirrored pair shares the same digit. However, standard Sudoku rules still apply, so a repeated digit must be in different rows, columns, and boxes. Palindrome lines are carefully constructed so that this repetition is always consistent with uniqueness rules.
Is Palindrome Sudoku harder than regular Sudoku?
Easy palindrome puzzles are often easier than classic Sudoku because the mirroring immediately links cells across the board, providing extra deductions. Harder difficulties become quite challenging because you must track mirrored constraints across long lines while maintaining standard Sudoku logic.
What is the best first move in Palindrome Sudoku?
Find palindrome lines where one endpoint cell is already constrained by its row, column, or box. Placing a digit there immediately fixes the mirrored cell at the other end. Also look for odd-length lines — the centre cell has no mirror partner, so it's only constrained by standard Sudoku rules.
How long does Palindrome Sudoku take to solve?
Easy puzzles take 8–15 minutes. Medium puzzles run 15–30 minutes. Hard puzzles average 30–60 minutes and expert puzzles often exceed 90 minutes. The difficulty increases sharply when multiple long palindrome lines overlap across the same region of the grid.