Junior Exocet

Expert

Two base cells and two target cells with a special constraint: base candidates must appear in the targets.

How It Works

Junior Exocet (JE): Two "base" cells (usually in the same row and box) and two "target" cells (specific positions in different boxes) have a special relationship.

Every digit in the base candidates must appear in at least one target cell. This constraint allows eliminating non-base candidates from the target cells.

Extremely rare and one of the most complex techniques.

Example

925
67
1
67
843
134
28
5
28
679
678349125
2
49
1
79
63
47
58
78
48
652139
47
37
5
39
789
789
4216
4
69
239
1
379
256
57
8
27
517
2468
38
268
9
36
24
38
689
239
24679
379
2567
457
36
1
Key cells of the techniqueCells where elimination is appliedCandidate to be placedEliminated candidate (crossed out)

Practice with a Real Puzzle

This 9×9 puzzle is solver-verified to require this technique on its solution path.

Expert25 givens