Crane

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.

Technique

1. Find a digit that forms a conjugate pair (exactly 2 occurrences) in a box.
2. Find another conjugate pair for the same digit in a row or column.
3. The pairs must share exactly one cell (the connection point).
4. Eliminate the digit from cells that see both tail cells (the non-shared endpoints).

Tips

• 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.