P1: LoopOver/SwitchTile is https://loopover.xyz/
P2: Fewest Moves is an event where competitors attempt to solve a puzzle (almost always the 3x3x3) in as few moves as possible, starting from a given scramble.
Notation to help:
A B C D E C-
┌───┬───┬───┬───┬───┐ ┌───┬───┬───┬───┬───┐ ┌───┬───┬───┬───┬───┐
1 │ A │ B │ C │ D │ E │ │ │ │↑ ↓│ │ │ │ │ │ │ │ │
├───┼───┼───┼───┼───┤ ├───┼───┼───┼───┼───┤ ├───┼───┼───┼───┼───┤
2 │ F │ G │ H │ I │ J │ │ │ │↑ ↓│ │ │ │ │ │ │ │ │
├───┼───┼───┼───┼───┤ ├───┼───┼───┼───┼───┤ ├───┼───┼───┼───┼───┤
3 │ K │ L │ M │ N │ O │ │ │ │↑ ↓│ │ │ 3- │<->│<->│<->│<->│<->│ 3+
├───┼───┼───┼───┼───┤ ├───┼───┼───┼───┼───┤ ├───┼───┼───┼───┼───┤
4 │ P │ Q │ R │ S │ T │ │ │ │↑ ↓│ │ │ │ │ │ │ │ │
├───┼───┼───┼───┼───┤ ├───┼───┼───┼───┼───┤ ├───┼───┼───┼───┼───┤
5 │ U │ V │ W │ X │ Y │ │ │ │↑ ↓│ │ │ │ │ │ │ │ │
└───┴───┴───┴───┴───┘ └───┴───┴───┴───┴───┘ └───┴───┴───┴───┴───┘
C+
Column names (Excel)
A, B, C, ... , Y, Z, AA, AB, ..., AZ, BA, ... CA, ..., ZA, ZB, ..., ZZ, AAA, AAB, ... AZZ, BAA, ..., ZZZ, ...
Row names (Excel)
1, 2, 3, 4, ...
Multiple moves
3+ 3+ <=> 3+2
C- C- <=> C-2
Alternate form:
C+ <=> C C- <=> C'
A+2 <=> A2 A-2 <=> A2'
3+2 <=> 3.2 3-2 <=> 3'2 <=> 3.2'
Move metrics
SM (slide metric): any move of any rows/columns, by a single slide move, counts as 1 move (what the website uses)
LM (line metric): any move of any rows/columns, by any multiples, counts as 1 move