I did the same thing, implementing all the guideline rules into my JS version of tetris here: http://simon.lc/tetr.js/ http://simon.lc/tetr.js/ However over th

I did the same thing, implementing all the guideline rules into my JS version of tetris here: http://simon.lc/tetr.js/ http://simon.lc/tetr.js/ However over the years, even after the guideline was instituted, there have been many different types of randomizers used. Of course, the original having none, and many a long the way having bugs.