Bähr’s Rule: The Essential Endgame Heuristic

I came across the idea of Bähr’s Rule 2-3 years ago while reading Dvoretsky's Endgame manual, but he does not refer to it as such, nor does he actually explain the rule (instead he comes up with his own, separate set of rules for it). But like a lot of chess ideas, it sort of drifted into the background without me ever really digging into it.

Looking at it again now, I honestly wish I had paid more attention earlier. It's simple to learn, and I'm sure I'll see it again not so uncommonly. There are many positions where you might be able to steer yourself into a draw by knowing this rule.

The Bähr’s Rule does unfortunately have some exceptions, but they all seem to have some common characteristics so that you know when the rule might not apply.
Instead of having to calculate a dozen moves in the endgame (when you're often in time trouble), you can immediately know if the position is a draw or a win. That alone can save time, especially in faster games where precise calculation isn’t always realistic.

After revisiting the rule, I ended up making a video where I go through it in detail. I didn’t want it to be just a definition or a quick mention, so I focused on examples and practical situations where the rule actually matters. Seeing it applied to real positions makes a big difference compared to just reading about it. My thinking was that if this helped clarify things for me, it would probably be useful for other players too.

I LOVE these types of heuristics, rules, and calculation shortcuts. If you know of any you think I might not know, share them with me! They are gold!

Here's the video: https://youtu.be/YfqdxnfCd0w