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This is a tough game. Am I wasting my time learning it, I haven't seen anything this tough or even similar on any recent tests?

No you are not wasting your time. Its importaint to drill the weird games because they expand your analyitcal abilities. You want to get to the point where NOTHING suprises you. Although, If you are taking the June test, I wouldnt focus to hard on unique games (just do them once or twice and move on).