I still didn't make a decision whether to continue. Except in the very beginning, I collected 36s but didn't involve them in the generation process. The 37+ seed almost exhausted and now I generated 2.5 millions 37s from 15% of the collected 466 millions 36s. Then switched back to seeding with 37+. Now I am waiting for the first pass to finish. It will take about 3 days and then I want to see how the previous generation rate of about 10 39s per day is dropped.
So far it is obvious that the minimal 40s are very rare.
I would be surprised if the number of 39s is less than 2000 or is more than 50 000.
Below are the latest 39s which arose either from the previous seed remnants or directly from the newly involved 36s.
- Code: Select all
........1..2.13.4..41.5.32...6..178..18.37.62.2768..13.653...7..7..6.2..2.4.75.36
- Code: Select all
...........1..2.34.3.14..56.2647..8.1.7.86..238...1.67412.38.757.32....886.71....
...........1..2.34.3.14..56.2647..8.1.7.86..238..21.67412.38.757.3.....886.71....
...........1.23.45243.65.71....56.8..26.8..57.582.74.6.12.387.4.37..2.1.48......3
...........1.23.45243.65.71....8..574.7.56.8.5.82.74.61.6.3...43.46.2.1882...1...
........1.12.34....536.1.42..5.7.4.8.2.8...67.78.46.2..31..8.7..8736..142.6..78.3
........1.12.34....536.1.42..5.7.4.8.2.8...67.78.46.2..37..8.1..8136..742.6..78.3
- Code: Select all
........1..1.23.4.2456.1.37....7..8..723.84.64.82.6.73.178.2..4.24.67.188..1.....
........1..1.23.4.2456.1.73....7..8..723.84.64.82.6.37.178.2..4.24.67.188..1.....
........1.12.34.5..351.6247...8....5.28.6..1.56134...8..7..3.8..8.47.5..2536.8.74
........1.12.3456..562.143...7....8..68.237.552.7.83...713...5..851.76.36....21..
I am updating periodically the 39s and 38s lists at
https://sites.google.com/site/dobrichev/sudoku-puzzle-collections. 38s collection now has 714163 puzzles.
If somebody is interested in 37s (800MB zip) or 36s (5.8GB zip), please let me know and I will put them on some server with relatively high access speed.