Reversi stable discs: the edges and corners
Stable discs in Reversi can never be flipped. Learn how a corner makes the edge discs next to it safe, and count your stable discs. Winning ideas · lesson 4 of 4.
The lesson in words
A disc that can never be flipped is called stable. The corner is the first stable disc.
Discs on the edge, in an unbroken line from your corner, are stable too: nothing can get behind them.
Gold has the top-left corner and some discs along the two edges beside it.
Try it: Tap every gold disc that can never be flipped.
Corners, then the edges they anchor. That’s the Reversi path complete!
Questions
At the end of the game, what matters?
Only the final count matters. Corners, stable discs and mobility are how you make sure it’s yours.