There are architectures with layers which can approximate MAXSAT [1] (or rather, an SDP relaxation thereof), but I doubt this is what OP was referring to. [1]:

There are architectures with layers which can approximate MAXSAT [1] (or rather, an SDP relaxation thereof), but I doubt this is what OP was referring to. [1]: https://arxiv.org/abs/1905.12149 https://arxiv.org/abs/1905.12149