How to read the grids
- Given - clues from the starting puzzle
- Subject - cells the technique focuses on
- Eliminated - candidates this technique removes
- Candidate - pencil marks shown for reference
How to spot it
Look for a tri-value pivot near two bi-value wings that share one of its digits each. The shared third digit Z is eliminated from cells that see all three of pivot and wings.
1
7
1
4
7
4
7
7
Worked example
Pivot {1,4,7}, wings {1,7} and {4,7}. Any cell that sees the pivot and both wings loses the candidate 7.
Time to practice
Reading is half the work. Try a puzzle now and look for the techniques you just learned.