if you want to see what mine looks like... (the thumbnails reduce size, which is a form of over-sampling anti-aliasing. click on them to see full resolution)
No anti-aliasing
Adaptive anti-aliasing (fwidth)
Too much blur
This demo was an anti-aliased checkerboard.
The anti-aliased checkerboard is now an exercise in a class Workbook, so I removed the shader code.
If you really want to see the code, you can probably find it. And enough other people have written checkboard shaders that you can get examples.
There are still some hints left (some parts were not removed).
if you want to see what mine looks like... (the thumbnails reduce size, which is a form of over-sampling anti-aliasing. click on them to see full resolution)