To my own surprise i now found out, that I have refound 440 (!) of the 488 puzzles in champagne's list in the step1 puzzles, which i generated from my random starting sets. But i only rated 97 of them, because the others did not pass my filters.
The only 11.5+ puzzles, which i did NOT find at all, are
- Code: Select all
200000006050080010004000900070301000000820000000705030009000400080010050600000002 taxonomy tarek-ultr11.80 11.80 11.40
500000009020100070008000300040600000000050000000207010003000800060004020900000005 taxonomy m_b_metcal11.80 11.80 3.40
500000009020100070008000300040002000000050000000706010003000800060004020900000005 taxonomy StrmCkr 11.60 11.60 3.40
000000007004008300100030060000904000009080200050002000600040001003800400700000050 tarx tarx0077 11.50 1.20 1.20
Puzzles 2 and 3 have 20 clues. I only made short tries for 20 clues, but was little successful.
This does not mean, that the majority of extremely hard puzzles already is discovered. But for me a puzzle, which cannot be solved with nested singles chains, or with an ER 12+ would be a very nice, big surprise.
In champagne's list there are 2 puzzles, which are not minimal. One by ronk with 2 minimals and the famous automorphic 37 clue by Mauricio with 60 (non equivalent) minimals. I replaced them by the minimals and canonicalized all of them. Also i added the 8 puzzles, Mauricio pointed to. I uploaded this list as others_ER11.zip.
Note that the ratings are not 100% compatible. E.g. i got 11.4/11.4/11.3 for the canonicalized version of the puzzle in the first link above, with the FIXED6 batch rating, which normally does not give higher ratings. For some of the puzzles in champagne's list, which i refound and rated, i only have 10.9. But the differences i noticed all were 0.1 only.
I will try a last run now with a new random starting set, but i dont expect great results.
I also uploaded my set of step1 puzzles with 21 clues as step1_21.zip (about 9 MB). Forgive me, when there are some duplicates. The 22/23 sets are too big for the site's maximum of 20MB.