I have yet to solve one LG on my own even without any time restrictions. I do very well with LR and RC, but for some reason LGs have been beating the crap out of me. It is difficult for me to fully comprehend how I should initially set up my game board, better yet make any inferences consistently. Mind you, I am still in progress with the LG section of the CC—but am nearly finished—but regardless, it has been totally disheartening for me.
How long did it take for you guys to fully grasp LG?