[tydok]

It's not based on math, it's empirical. In practice seems to work.

I applied it on the minefield in the article and I solved it.

To put it another way, on two adjacent tiles where there's one mine, if you had the choice to reveal a 2 or a 6, which one would you choose?

[ufo]

Someone should build a little computer simulation to test this over a million minefields.

[seanp2k2]

Better, have it actually learn from mistakes and see what logic it comes up with.

[tydok]

Good idea, I could do it.