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I believe it’s something like 500 elo points difference at this point between Magnus and Stockfish running on cheap hardware. Computers are so strong the only way to measure their strength is against other, weaker computers, and so on until you get to engines that are mere “grandmaster” strength.

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Bear in mind that, beyond the “top” elo ratings, that it’s purely an estimate of relative strength. The gap between a GM and me is far greater than the gap between a GM and Stockfish, even if the stated elo difference is the same.

By this I mean, you can give me a winning position against Magnus and I’ll still lose. Give a winning position to Magnus vs Stockfish and he might draw or even win.

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True, what is considered a “winning” position is different at different elo levels. The better someone is, the smaller their mistakes are relative to perfect play.

I wish top players like Magnus would do more exhibition games against top computers. They don’t have to all start with equal material or an equal position.