tsi540: Not correct.
If you enrich the mixture from peak EGT, the CHT will increase - repeat increase - until the mixture is about 25C rich of peak. After that, enriching the mixture will result in a decrease in CHT.
I don’t know what picture you’re trying to post, but if it has CHT and EGT curves that peak at the same point (e.g. like those in the EDM manuals) they are bull****. All you need to do is plot EGT against CHT in a real aircraft in the real world on a real flight. (I’m always struck by the irony of my love and dependence of the EDM in my aircraft but contempt for some of the OWT in the EDM manuals, which OWTs have been proved as OWTs as a consequence of measurements on the EDM...)