I understand your criticism that you already know the answers for memory, but the point is not getting the answers. The point is getting to the place where you KNOW THAT YOU KNOW how to perfectly attack each game.
I also really think it is really helpful to do the same type one after the other after the other....you'd be surprised how many similarities you'll see within the micro-categories. Many of the games have characteristics that are unique to that type.
Here are the categories...(source: Powerscore Logic Games Bible)
In regard to memory of past problems, it is not the memory of which answer is correct, but the path that I found the answer in the path. If I struggle with a problem, I am much more likely to remember exactly how I overcame that problem, which is usually missing a critical deduction. When I rework the problem, I remember "there's something that restricts this pair of variables," which prompts me to find that. On a fresh game, I don't have that thought lingering in the back of my mind. I do try to prove to myself that the wrong answers are wrong as well as definitively proving my selection is correct.
I will break the games down further, I think seeing the similarities may help me. So far this week, I have done each of the grouping games twice. My timing and accuracy have improved, even when I make sure to eliminate all the wrong answers, but I am not sure if that is because I am familiar with the questions.
Thanks for sharing your experiences.