How did you learn 7-Simul?
And can you give a quick overview of it?
I might learn 7-Simul or Sheerin
I watched tommy's tutorial on it. It's a pretty simple concept:
You start memo on a side, this side has clocks denoted by a lower-case letter. The other side has clocks denoted by an upper-case letter. Notation of clocks is fairly simple: the middle one is c, the corners are ul, ur, dr, dl, and the edges are u, r, d, l. It should be obvious which is which.
You memorize 6 letters which all represent a number like A=1, B=2 etc. Notice how 7=-5 on clock because it is periodic with period 12. So -5 is memorized with G etc. Here is how to calculate the memo (note: tommy uses notation c-d where I use d->c, but both just mean 'what does d need to do to go to c?':
1. d->c
2. r->dr + L->U
3. U->L
4. r->d
5. U->UR + D->C + ul->l + r
6. c->u + d + L->UL + R->DR
Exec (start on the other side as the one you started to memo on):
1. all pins up except dl, with dl do number 1, with ur do number 2
2. Push ul pin down, with ur do number 3, with ul do number 4
3. Push ur pin down, make 2x2 in ul intuitively using ur and ul dials
4. Push ul pin up, with ul do number 5, with ur do number 6
5. Push dr pin down, make 2x3 on the left intuitively using ur and ul dials
6. Push dl pin up, and using ur and ul dials match everything except upper right corner
7. Push dr pin up, and solve the clock intuitively.