- 5b2) Any repair to a puzzle must not give the competitor any advantage in solving the puzzle. Penalty: disqualification of the attempt (DNF).
But does this mean that the solver always have to adjust the cube to the worst possible scenario?
The fairest way I can see is that the competitor have to adjust the cube to the state before the incident, but that may be hard to rember and if it happens early in the solve it is almost impossible to know what state the cube should be in.
The best example I can imagine is a megaminx solve, during one of your first pairs you accidentally twist a S2L corner. You keep on going since another corner could twist and according to (my interpretation of) reg 5b3c you're only allowed to twist a single corner. When you reach LL you have only one corner twisted, what should you do?
Twisting the unsolved corner seems to give you an advantage, but if would've twisted another corner you may have gotten a PLL skip that would give you a bigger advantage.
The piece you originally twisted has been treated like a correctly oriented piece so should it be seen as two incorrectly solved pieces and a corner twist?
At the very least there should be something in the guidelines to clear this up because quite a lot of people might have cheated by mistake.