The very first guard pass I learned was the stacking guard pass (also known as the smashing guard pass or sometimes the ‘over under’ pass).
Initially I was doing this pass all wrong, and I can’t even begin to count how many times I got triangle choked trying it. But eventually I learned a few tweaks that made it much harder for my opponents to apply the triangle choke, and now it’s one of my bread and butter guard passes.
In the video below I share some of the things I keep in mind when I’m using the smashing or stacking guard pass to pass the guard. (Also, towards the end of the video there’s a choke that looks like it shouldn’t work but has worked really well for me).