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Medium

Binary #617 · 8×8

Your game is saved in this browser as you play.Rules of Binary

Binary #617 is a 8×8 grid at medium level. 18 of its 64 cells are given, about 28 %, and the other 46 follow from the three rules.

The givens already show 2 pairs of equal symbols side by side. Close each pair with the opposite symbol at both ends: that is the quickest start.

There are 4 gaps 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.