Crane
Level 5 · Orange Belt
Prerequisite: Single-Digit PatternsLearn next → X-Wing
Overview
Crane uses two conjugate pairs of the same digit: one in a box and one in a line. The pairs connect through a shared cell, forming a pattern where one of the two tail cells must contain the digit.
How It Works
- Find a digit that forms a conjugate pair (exactly 2 occurrences) in a box.
- Find another conjugate pair for the same digit in a row or column.
- The pairs must share exactly one cell (the connection point).
- Eliminate the digit from cells that see both tail cells (the non-shared endpoints).
Example
Find a box and a row or column that each have exactly two cells with candidate 2.
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Tips & Patterns
- Crane is closely related to Skyscraper and Two-String Kite - all three use two conjugate pairs connected through a shared unit.
- The elimination targets cells that see both endpoints of the 'crane arms'.
- Look for digits with exactly 2 occurrences in both a box and a line.