cooked it! What did I do wrong?

Need some good pics of the #2 rings on all the cylinders. The one from the blown piston does not look good. It should be 1/2 silver(bottom) and 1/2 dark color(top). If not the the taper on the ring is gone. This happens when you wash the cylinder down from a way rich condition.

It doesnt look like heavy detonation, the bearings look good and no scuffing on the skirts. It looks more like pre-ignition. Its getting the piston tops HOT, and they are all starting to melt. Plus with the high heat the rings could have butted and popped the piston top.

What do the undersides of the pistons look like? Right above the pin?