Two-string kite: join a row and column through a box

A two-string kite uses one row strong link and one column strong link for the same digit, connected by a weak link inside a box.

Key idea

One of the two free endpoints must be true, so a cell that sees both free endpoints cannot contain the digit.

See the move, step by step

Connect the row-1 and column-2 strings for candidate 7.

Step 1 of 4

Row 1 and column 2 each have two relevant positions for candidate 7.

Row, column, and joining box

Step 2 of 4

R1C1 and R2C2 see each other in box 1, joining the two strong links.

Kite geometryLinked 7 candidates

Step 3 of 4

R7C6 sees free endpoint R1C6 by column and R7C2 by row, so its 7 is impossible.

Kite chainCandidate to remove

Step 4 of 4

The strings remain unresolved, but their shared target is now cleaner.

Two-string kiteUpdated target

Filter one digit and look for a two-candidate row plus a two-candidate column whose inner endpoints share a box.