Binary #628 · 8×8

• 8×8grid
• 17given cells
• 47to fill
• 27% given

Binary #628 is a 8×8 grid at medium level. 17 of its 64 cells are given, about 27 %, and the other 47 follow from the three rules.

The givens already show 4 pairs of equal symbols side by side. Close each pair with the opposite symbol at both ends: that is the quickest start.

There is one gap between two equal givens. Each takes the opposite symbol.

Medium grids are larger and need patience with counting: after every move, look along the row and the column you just changed.