XYZ-Wing
AdvancedUsed at: Expert
A variant of XY-Wing where the pivot has three candidates. The pivot chains with two cells in the same box.
XYZ-Wing Steps
1
Find the pivot
Find a cell with three candidates (XYZ). This is the pivot.
2
Find the wings
In the same box, find cells with XZ and YZ candidates.
3
Eliminate Z
Eliminate Z from cells that see the pivot and both wings.