In the tridagon thread (http://forum.enjoysudoku.com/the-tridagon-rule-t39859-120.html),
I analysed the last collections of T&E(2) puzzles published by Paquita:
http://forum.enjoysudoku.com/the-hardest-sudokus-new-thread-t6539-1644.html
http://forum.enjoysudoku.com/the-hardest-sudokus-new-thread-t6539-1648.html
http://forum.enjoysudoku.com/the-hardest-sudokus-new-thread-t6539-1650.html
and I remarked that they have:
- unusually high proportions of non-degenerate tridagons (resp. 97.01%, 99.97% and 100%);
- unusually high proportions of puzzles in B6B;
- no puzzle in B7B.
Let me add to the above collections, the one published by Hendrik Monhard:
http://forum.enjoysudoku.com/the-hardest-sudokus-new-thread-t6539-1628.html
https://drive.google.com/file/d/1LxrL5R5vmYqj6f7FBEmPL5ot7OZY1pXH/view?usp=drive_link
It contains 55,088 puzzles, 46,079 of which are in T&E(2), the rest in T&E(3).
The puzzles in T&E(3) all have a non-degenerate tridagon pattern and they are all in B2BB=T&E(B2, 2), same as all the known T&E(3) puzzles.
Let's therefore concentrate on the T&E(2) sublist. This is where the main news are.
First big news is, it has 77 puzzles in B7B. (Until now, we knew only 10 different ones.)
- Code: Select all
puzzle ER/EP/ED creation_date position_in_T&E(2)_list
98.76.54.7.5.4.8....6....9.67...5...4.8...75..59....68...3....9...2..........4... 11.7/1.2/1.2 220515 #3079
98.76.5..7.4.8.....56...8..8.5..7.4.6..59.....79.48.6....9....3......4..........2 11.7/1.2/1.2 220515 #3080
98.76.54.7.5..4....6...8.9.85.9.6...4.6.87......45...8..7...3........2..........9 11.7/1.2/1.2 220515 #3081
98.76.54.7.5.9.....64..8.9.85.9.6...4.6.87......45...8..7...3........2..........9 11.7/1.2/1.2 220515 #3233
98.76.54.7.5.498...6.8.....49..87....579.6......45...9..6....3........2.........8 11.7/1.2/1.2 220515 #3234
98.76.54.7.5..4....6...8.9.8..9.6...4.6.87..5...45...8..7...3........2..........9 11.7/1.2/1.2 220515 #3235
98.76.54.7.5.9.....64..8.9.8..9.6...4.6.87..5...45...8..7...3........2..........9 11.7/1.2/1.2 220515 #3236
98.76.5..7.5.498...648......9..87....579.6.4....45..9...6.....3.......8.........2 11.7/1.2/1.2 220515 #3237
98.76.5..7.5..9....645.8...8...75.9.5.649...7...8.....6.....4.3...6.4...........2 11.8/1.2/1.2 220928 #5743
98.76.5..7.58.49...46.5.....78.46.9...958.......9.7....6.........4....32.....8.5. 11.8/1.2/1.2 220928 #5744
98.76.5..7.5.496...4.......67.89....5..4.6.7..94.5........8..........8.3......4.2 11.8/1.2/1.2 230514 #15340
98.76.5..7.4..98...56......8..5.6.9..67.8......9.74.......4..........6.3......4.2 11.8/1.2/1.2 230514 #15344
98.76.5..7.4..98...56..8...8..5.6.9.5.9.74....679.........4..........6.3......4.2 11.8/1.2/1.2 230514 #15345
98.76.5..7.5.496...4.5.....67.89....5..4.6.7..94..7.......8..........8.3......4.2 11.8/1.2/1.2 230514 #15346
98.76.5..7.5..89...645.9...59...4....486.5.7...7.8......6....9....4............32 11.8/1.2/1.2 230514 #15382
98.76.5..7.6.4......58.....6.859..4.45..7.....9.6......7..........98.4.5......3.2 11.6/1.2/1.2 230514 #34412
98.76.5..7.5.496...4.5.....67.89....5..4.6.7..94.7........8..........8.3......4.2 11.6/1.2/1.2 230514 #37154
98.76....7.6..5....458.....6...98.....7..48.....57.9..5.4....98.....6..........32 11.6/1.2/1.2 230514 #37188
98.76.5..7.5.496...4.......67.89....5....6.7..94.5........84.........8.3......4.2 11.6/1.2/1.2 230514 #37325
98.76.5..7.5..96...4.......67.89....5..4.6.7..94.5........84.........8.3......4.2 11.6/1.2/1.2 230514 #37396
98.76.5..7.6.4......58.....6.859..4.4...7.....9.6...5..7..........98.4.5......3.2 11.6/1.2/1.2 230514 #37433
98.76.5..7.4..98...5.......8..5.6.9..67.8......9.74...6.....4.3....4..........6.2 11.6/1.2/1.2 230514 #37439
98.76....7.6..58...458.....6...98.....7..4......57..9.5.4...9.8.....6.........3.2 11.6/1.2/1.2 230514 #37475
98.76.5..7.4..98...56......8..5...9..67.8......9.74......64..........6.3......4.2 11.6/1.2/1.2 230514 #37485
98.76.5..7.6.45.....58.....6.8.9..4.45..7.....9.6......7..........98.4.5......3.2 11.6/1.2/1.2 230514 #37517
98.76.5..7.6.4......58.....6.759..4.45..78....9.6......7..........98.4.5......3.2 11.6/1.2/1.2 230514 #38028
98.76.5..7.4..98...56..8...8..5.6.9.5.7.94....6..7........4..........6.3......4.2 11.6/1.2/1.2 230514 #38836
98.76.5..7.4..98...56..8...8..5.6.9.5.9.74....67.9........4..........6.3......4.2 11.6/1.2/1.2 230514 #38844
98.76.5..7.4..98...5.......8..5...9..67.8......9.74...6.....4.3...64..........6.2 11.6/1.2/1.2 230514 #38891
98.76.5..7.6.4......58.9...6..5...4.45..78....976......7..........98.4.5......3.2 11.6/1.2/1.2 230514 #38922
98.76.5..7.6.45.....58.9...6......4.45..78....976......7..........98.4.5......3.2 11.6/1.2/1.2 230514 #38927
98.76.5..7.5.496...4.5.....67.89....5..4.6.7..94..5.......8..........8.3......4.2 11.6/1.2/1.2 230514 #38939
98.76.5..7.5.496...4.5.....69.87....5..4.6.7...4.9........8..........8.3......4.2 11.6/1.2/1.2 230514 #38944
98.76.5..7.6.45.....58.....6...9..4.45..78....976......7..........98.4.5......3.2 11.6/1.2/1.2 230514 #38967
98.76.5..7.4..98...56..8...8..5...9.5.9.74....679........64..........6.3......4.2 11.6/1.2/1.2 230514 #39001
98.76.5..7.6.4......58.9...6.75...4.4...78....9.6...5..7..........98.4.5......3.2 11.6/1.2/1.2 230514 #39044
98.76.5..7.6.4......58.....6.759..4.4...78....9.6...5..7..........98.4.5......3.2 11.6/1.2/1.2 230514 #39045
98.76.5..7.6.4......58.....6..59..4.4...78....986...5..7..........98.4.5......3.2 11.6/1.2/1.2 230514 #39049
98.76.5..7.6.4......58.....6..59..4.45..78....976......7..........98.4.5......3.2 11.6/1.2/1.2 230514 #39052
98.76....7.6.54....548.....64..98.....76.58......7.9..4.5....98.....6..........32 11.6/1.2/1.2 230514 #39058
98.76.5..7.4..98...56..8...8..5.6.9..678.......9.74.......4..........6.3......4.2 11.6/1.2/1.2 230514 #39059
98.76.5..7.5..96...4.5.....67.89....5..4.6.7..94..7.......84.........8.3......4.2 11.6/1.2/1.2 230514 #39081
98.76.5..7.5.496...4.5.....67.89....5....6.7..94..7.......84.........8.3......4.2 11.6/1.2/1.2 230514 #39140
98.76.5..7.5.496.....5.....69.87....5..4.6.7...4.9....4.....8.3....8..........4.2 11.6/1.2/1.2 230514 #39162
98.76.5..7.6.45.....58.....6...9..4.45..78....986......7..........98.4.5......3.2 11.6/1.2/1.2 230514 #39167
98.76.5..7.5..96...4.5.....69.87....5..4.6.7...4.9....4.....8.3....8..........4.2 11.6/1.2/1.2 230514 #39170
98.76....7.6.54....548.....64..98.....7..58.....67.9..4.5....98.....6..........32 11.6/1.2/1.2 230514 #39193
98.76.5..7.5.496...4.5.....67.89....5....6.7..94.7........84.........8.3......4.2 11.6/1.2/1.2 230514 #39197
98.76.5..7.6.4......58.9...6.75...4.45..78....9.6......7..........98.4.5......3.2 11.6/1.2/1.2 230514 #39200
98.76.5..7.4..98...5...8...8..5...9..678.......9.74...6.....4.3...64..........6.2 11.6/1.2/1.2 230514 #39211
98.76.5..7.5.496...4.5.....69.87....5....6.7...4.9........84.........8.3......4.2 11.6/1.2/1.2 230514 #39224
98.76.5..7.6.45.....58.....6.7.9..4.45..78....9.6......7..........98.4.5......3.2 11.6/1.2/1.2 230514 #39261
98.76.5..7.5..96...4.5.....69.87....5..4.6.7...4.9........84.........8.3......4.2 11.6/1.2/1.2 230514 #39265
98.76.5..7.5.496...4.5.....67.89....5....6.7..94..5.......84.........8.3......4.2 11.6/1.2/1.2 230514 #39318
98.76.5..7.5..96...4.5.....67.89....5..4.6.7..94.7........84.........8.3......4.2 11.6/1.2/1.2 230514 #39336
98.76.5..7.4..98...56..8...8..5...9..678.......9.74......64..........6.3......4.2 11.6/1.2/1.2 230514 #39422
98.76.5..7.6.4......58.....6..59..4.45..78....986......7..........98.4.5......3.2 11.6/1.2/1.2 230514 #39431
98.76.5..7.6.45.....58.9...6.7....4.45..78....9.6......7..........98.4.5......3.2 11.6/1.2/1.2 230514 #39443
98.76.5..7.4..98...5...8...8..5.6.9..678.......9.74...6.....4.3....4..........6.2 11.6/1.2/1.2 230514 #39447
98.76....7.6..58...458.....65..98.....75.4.......7..9.5.4...9.8.....6.........3.2 11.6/1.2/1.2 230514 #39455
98.76....7.6..5....458.....65..98.....75.48......7.9..5.4....98.....6..........32 11.6/1.2/1.2 230514 #39458
98.76.5..7.5..96...4.5.....67.89....5..4.6.7..94..5.......84.........8.3......4.2 11.6/1.2/1.2 230514 #39464
98.76.5..7.4..98...56..8...8..5.6.9..6.87......7.94.......4..........6.3......4.2 11.6/1.2/1.2 230514 #39681
98.76.5..7.6.4......58.....6..59..4.4...78....976...5..7..........98.4.5......3.2 11.6/1.2/1.2 230514 #39797
98.76.5..7.4..98...5...8...8..5...9..6.87......7.94...6.....4.3...64..........6.2 11.6/1.2/1.2 230514 #39950
98.76....7.5...9...46..5...5..98.....6.5.7.8...8.46....7..........6.4.98.......32 11.6/1.2/1.2 230514 #39952
98.76.5..7.4..98...56..8...8..5...9.5.7.94....6..7.......64..........6.3......4.2 11.6/1.2/1.2 230514 #39953
98.76.5..7.4..98...5...8...8..5.6.9..6.87......7.94...6.....4.3....4..........6.2 11.6/1.2/1.2 230514 #39955
98.76....7.5...9...46..58..5..98.....6.5.7.....8.46....7..........6.4.98.......32 11.6/1.2/1.2 230514 #39957
98.76.5..7.4..98...56..8...8..5...9..6.87......7.94......64..........6.3......4.2 11.6/1.2/1.2 230514 #39959
98.76.5..7.6..5....4..8....8..6...5.5...98.4..97.4....67....4.5...9...........3.2 11.6/1.2/1.2 230514 #39960
98.76.5..7.6..5....45.8....8..6......9754........98.4.67....4.5...9...........3.2 11.6/1.2/1.2 230514 #39961
98.76.5..7.6..5....4..8....8..6.....5...98.4..9754....67....4.5...9...........3.2 11.6/1.2/1.2 230514 #39962
98.76.5..7.5.496.....5.....69.87....5....6.7...4.9....4.....8.3....84.........4.2 11.6/1.2/1.2 230514 #39965
98.76....7.6..5....45.8....8..6..5...9754........984..67.....54...9............32 11.6/1.2/1.2 230514 #39966
98.76.5..7.6.4......58.9...6..5...4.4...78....976...5..7..........98.4.5......3.2 11.6/1.2/1.2 230514 #40118
98.76.5..7.4..98...56..8...8..5...9.5.9.74....67.9.......64..........6.3......4.2 11.6/1.2/1.2 230514 #40187
Second big news is, it has puzzles beyond B7B. Indeed, it has 15 puzzles in B9B and 1 in B10B and they don't even have the highest SER.
- Code: Select all
puzzle ER/EP/ED creation_date position_in_T&E(2)_list BpB_classif
98.76.5..7.48......56......56..8..4.4.89.6....7945......7..........9...3....7.2.1 11.6/1.2/1.2 220515 #4706 B9B
987......6...........85.....4.3..21....42..58....184.3..2..31.....54.32....1...84 11.6/1.2/1.2 220928 #15309 B9B
987......65.9...........6..4..32.16.3..1.4..2....96......4...19...2.13......3.42. 11.7/1.2/1.2 230514 #19131 B9B
987......65.9...........6..4..32.91.2..4.13.6....6.......2...93...13.4......942.1 11.7/1.2/1.2 230514 #21539 B9B
987......65.9...........6..4..32.91.2..4.13.6....6.......2...93...13.46......42.1 11.7/1.2/1.2 230514 #22103 B9B
98765.......4..........3...87..6.9...95.2..76..2...85.25.....9..68....27......5.8 11.7/1.2/1.2 230514 #29398 B10B
987......6...........85.....4.3.521....42..58....1.4.3..2..31.....54.32....1...84 11.6/1.2/1.2 230514 #31148 B9B
987......6..8...........5...4.32..1....4.12.8....5834...32....1...13.45.....84.2. 11.6/1.2/1.2 230514 #31627 B9B
98.76.5..7.58.49...64.9....64..78.5.5.8.......9.54.....7............6..3.......21 11.6/1.2/1.2 230514 #34255 B9B
98.76.5..7.5.......64.8....8..5.7.4..9784.....5..96...6.9.........9....3......2.1 11.6/1.2/1.2 230514 #37229 B9B
98.76.5..7.5.......64.9....6..5.7.4.5...89....7864.....9..........8....3......2.1 11.6/1.2/1.2 230514 #38797 B9B
98.76.5..7.59.4.......8....6.95.....47.6.8.....8.7..4..6......3....96.........2.1 11.6/1.2/1.2 230514 #38898 B9B
98.76.5..7.59.4.....6.8....6.95.....47.6.8.....8.7..4..9....3.2....96...........1 11.6/1.2/1.2 230514 #38903 B9B
98.76.5..7.5..9....64.8....8..5.7.4..9784.....5..96...6.9.........6..3.2........1 11.6/1.2/1.2 230514 #38924 B9B
98.76.5..7.59.4.....6.8....6.75.....49.6.8.....8.9..4..7....3.2....76...........1 11.6/1.2/1.2 230514 #39788 B9B
98.76.5..7.59.4.......8....6.75.....49.6.8.....8.9..4..6......3....76.........2.1 11.6/1.2/1.2 230514 #39823 B9B
In the same way as I couldn't believe my eyes when I found that Loki was not in T&E(2), I couldn't believe that these puzzles were not in B7B or lower and that they were not even in B8B. But all the checks I made lead to the conclusion that the results are correct.
Notice however that all these puzzles have a non-degenrate tridagon and they can be easily solved with short chains and Trid-ORk-chains when it is used (except 4 of the 77 B7B ones that require longer chains).
Note that all these results where made possible by the SHC:
(http://forum.enjoysudoku.com/the-sudoku-hierarchical-classifier-shc-t42075.html).
Without it, the computations could be done by SudoRules, but they would take so much more time as to become impractical.
.