Jedi5412
Veteran
Everything that everyone else has mentioned, pretty much and McDonalds. When I have a feed of Maccas I can't concentrate afterwards. I found that one out at my last comp xD. 1st day I had bacon and Eggs on toast for brekkie and I was getting good as solves! 2nd day I had maccas for brekkie and I failed miserably.
Try having a salad for breakfast then you'll get sub 10 solves