DWG-105.4.05
Binary #5 · Expert
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About this puzzle
A 12×12 grid with 35 of its 144 cells given (24%). Every row and column needs 6 rings and 6 dots.
Row 1 has the most givens (4); among the columns, column 1 has the most (5).
Where to start
The start already shows 10 doubles and one sandwich, each of which forces its neighbours.
At least once you will need the stronger step: list the ways an almost full line can be finished and keep the only one that works — remembering that no two lines may be identical.