Unique Rectangle Type 2

Unique Rectangle Type 2 is similar to Type 1, but two cells (on the same side) share an additional candidate. That extra candidate must be placed in one of them, so it can be eliminated elsewhere.

Technique

1. Find a potential deadly pattern rectangle with candidates {X,Y}.
2. Two cells on the same side have one additional candidate Z (same in both).
3. Z must be placed in one of these cells to avoid the deadly pattern.
4. Eliminate Z from cells that see both of these "roof" cells.

Tips

• The two cells with extra candidates must be in the same row or column (not diagonal).
• The extra candidate Z is the same in both cells.
• Type 2 makes eliminations outside the rectangle.