Methuselah96
Member
Pros of scramble filtering (more than the +2 and solved positions):
The 2014 changes to the WCA Regulations included the addition of 4b3 (https://github.com/cubing/wca-documents/issues/48):
Here is what would be filtered:
Rubik's Cube: 19/43,252,003,274,489,856,000 (0.000000000000000043928601%)
2x2x2 Cube: 385/3,674,160 moves (0.01047858558%)
Pyraminx: 221,233/7,558,2720 moves (0.29270314696%)
Skewb:7,1625/3,149,280 moves (2.27432937052%)
Square-1: working on that
Here is a discussion for filtering for more info: https://groups.google.com/forum/#!topic/wca-scrambler/3x_hN9Y4HCM
This regulation was added in an effort to add transparency to the process that TNoodle uses to find random scrambles. This scrambling filter (except for Skewb and Square-1) has been in effect for a long time and was documented in the readme for TNoodle but was never addressed in the Regulations or Guidelines.
This discussion was originally brought up in this thread but I thought a poll would be useful.
Should there be scramble filtering for determining scrambles?
If so, how should these limits be decided?
- Reduces chance of slower solvers getting ridiculously lucky and undeserved solves.
The 2014 changes to the WCA Regulations included the addition of 4b3 (https://github.com/cubing/wca-documents/issues/48):
4b3) Specification for the scramble program: An official scramble sequence must produce a random state from those that require at least 2 moves to solve. The following additions/exceptions apply:
4b3a) For blindfolded events, the scramble sequence must orient the puzzle randomly (equal probability for each orientation).
4b3b) 2x2x2 Cube: The (random) state must require at least 4 moves to solve.
4b3c) Pyraminx and Skewb: The (random) state must require at least 7 moves to solve.
4b3d) Square-1: The (random) state must require at least 11 moves to solve.
4b3e) 5x5x5 Cube, 6x6x6 Cube, 7x7x7 Cube, and Megaminx: sufficiently many random moves (instead of random state), at least two moves to solve.
Here is what would be filtered:
Rubik's Cube: 19/43,252,003,274,489,856,000 (0.000000000000000043928601%)
2x2x2 Cube: 385/3,674,160 moves (0.01047858558%)
Pyraminx: 221,233/7,558,2720 moves (0.29270314696%)
Skewb:7,1625/3,149,280 moves (2.27432937052%)
Square-1: working on that
Here is a discussion for filtering for more info: https://groups.google.com/forum/#!topic/wca-scrambler/3x_hN9Y4HCM
This regulation was added in an effort to add transparency to the process that TNoodle uses to find random scrambles. This scrambling filter (except for Skewb and Square-1) has been in effect for a long time and was documented in the readme for TNoodle but was never addressed in the Regulations or Guidelines.
This discussion was originally brought up in this thread but I thought a poll would be useful.
Should there be scramble filtering for determining scrambles?
If so, how should these limits be decided?
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