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Question about Engine (Stockfish 11 vs. 13 NNUE)

Sometimes when I load the analysis board I get the classic Stockfish 11+, and sometimes I get the neural net-assisted one.

What causes one to show up, rather than the other? Particularly funny was last night, when I was using two computers to work on different chapters of the same study. One was running on 11 and the other on 13.

Especially, is there a way for users to pick their preference yet?
I bet you didn't use the same browser for each computer. I always encounter the same issue when I change the browser (chrome) to a different browser, I believe it happens due to some browsers compatibility.
@turbojerboa
The things that influence this are ofc the "Use NNUE" toggle in the settings and besides that, whether your browser supports WebAssembly SIMD and has it enabled (Firefox before the version from a few weeks ago used to require a specific setting to activate this and pretty much all other non-Chromium browsers don't support it at all), and whether your CPU supports the required SIMD primitives (which usually means that it's not older than a decade or so, very roughly speaking).

Most likely, one of your PCs either has an older FF version and you don't have the "WebAssembly SIMD" setting enabled or it is too old to support it in the first place.
Ok thanks! Wow, not sure how I missed it. I am probably playing the wrong game haha

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