The hardest sudokus (new thread)

Everything about Sudoku that doesn't fit in one of the other sections

Re: The hardest sudokus (new thread)

Postby coloin » Mon Aug 19, 2024 1:24 pm

If it helps ... only these ones are new ... and could be used as furthur seeds i guess
Hidden Text: Show
Code: Select all
1.3.56....567.....78.1.3..5.35..7...61...83..8.73...1..68.........8..9.6......2..
1.3.56....5678....78.1.3..5.35..7...61....3..8.73...1..68.........8..9.6......2..
1.3.56....5678....78.1.3..5.35..7...61...83..8.73...1..68............9.6......2..
1.3.56....5678....78.1.3..5.35..1...67...83..8.13...7..68............9.6......2..
1.3.5...9.5.1....669.73...5.......43......8..7.......1.7.6......6139....9.5..1...
1.3.5...9.5.1....669.73...5.......43......8..7.......1.7.6.5....6139....9....1...
1.3.5...9.5.1....669.73...5.......43......8..7.......137.6......6139......5..1...
1...567....718....68.3.75.........4.36....8.7........251..3....7.8.65....368.1..5
1...567...5.18....68.3.75.........4.36....8.7........251..3....7.8.65....368.1..5
....567....718....68.3.75.........4.361...8.7........251..3....7.8.65....368....5
....567...5.18....68.3.75.........4.361...8.7........251..3....7.8.65....368....5
.234..7..4.7..9.3.69.......26....3......6.85...........7.24.....46.93...9..6.7..3
.234..7..4.7..9.3.69.......26....3......6.85..........37.24.....46.93...9..6.7...
.234.67..4.7..9.3..9.......26....3......6.85...........7.24.....46.93...9....7..3
.234.67..4.7..9.3..9.......26....3......6.85..........37.24.....46.93...9....7...
1.3.56....567.....78.1.3..5.35..1...67...83..8.13...7..68.........8..9.6......2..
1.3.56....5678....78.1.3..5.35..1...67....3..8.13...7..68.........8..9.6......2..

It tends to be the11.7 which have the high BxB however....
the first 4 are bxb=6
The next ones seem to be higher !
coloin
 
Posts: 2456
Joined: 05 May 2005
Location: Devon

Re: The hardest sudokus (new thread)

Postby Paquita » Mon Aug 19, 2024 1:47 pm

Hi coloin

I wonder where the ones that were known to you are published? Because it seems I am missing some files in my collection....and I marked those as new.
Paquita
 
Posts: 130
Joined: 11 November 2018

Re: The hardest sudokus (new thread)

Postby coloin » Mon Aug 19, 2024 2:08 pm

The first 3 have got 22 clues or so so should be in the original big file by champagne....
the others I would have to dig deeper
Hidden Text: Show
Code: Select all
.2.4....9..7....3.6...7.1...4......87.....5....5.1..6.3...6..5......8..2...9.....## 21  ED=11.8/11.8/10.7
.2.4.........89......23.6....5....9..3..4.2..7.......1..1....5..6.3..8..9.......7## 21  ED=11.8/11.8/10.4
...4....9....8.2..6....3.1..7...5.6....9..8......2...45.8......76...1....3.....7.## 21  ED=11.8/11.8/11.1
....567.....1.9...6...7......4.....13...6.9...8.....2.5....73....2.....8.1.....4.## 21  ED=11.8/11.8/11.2
.2.4..7....6.....17...3......5....6..4.2..9.......5..8..1..8....9..7.......92.3..## 21  ED=11.8/11.8/9.8 
1......8......92....6.3...52....8.....5.7.....6.5....4..47...........91..3..6...7## 21  ED=11.8/11.8/2.6 
1.......9.5....2....87...4.2...3......48.5....8.6...7...6..4.5.........1....9.3..## 21  ED=11.8/11.8/7.9 
....56......1....6.8.3.7....6...3..75......2...4...9...1.7....8..2....4.9.....5..## 21  ED=11.8/11.8/10.4
.2.....8....7...23......5.6..4.1.....6.3....29....5....7.8...6.5....4.....1.9....## 21  ED=11.8/11.8/10.8
.....678........327.....5....1.4.....9.2.....6....7.5.3....58....29......4..1....## 21  ED=11.8/11.8/3.4 
1......89.....91.3.......6...7.4....3....1..5.6.2.....5....89...4..7......26.....## 21  ED=11.8/11.8/3.4 
1.......9..67...2..8....4......75.3...5..2....6.3......9....8..6...4...1..25...6.## 22  ED=11.8/11.8/11.6
..3.5.7..4....9...6..2.......5...8.3.9.....6.8..........8.1...75....4.2.....3.5.8## 22  ED=11.8/11.8/2.6 
...4...8......92..6...7...5...8...9......24...3..1...7316......57.........2.6...3## 22  ED=11.8/11.8/11.7
.2...67..4...8......93........9..57..1...7..2......61.3...4..6...8.......6...5.2.## 22  ED=11.8/11.8/11.5
.2.4....9..7.8.2..6.....1.........93.....5.2..9.2..4..5....7....1.3...4...8.6....## 22  ED=11.8/11.8/9.4 
.2.....894......3...9.7.5......6.9..3.......2.8...2.4...16......7..1..9....5..1..## 22  ED=11.8/11.8/2.6 
..345........89......23.5...1......7..4..28..9......6...2..84..6......9..7......1## 22  ED=11.8/11.8/11.4
...4.6.....6..9.2.7...1.....1..3.4....96...5.8.......7.3......8..2..49.....5...4.## 22  ED=11.8/11.8/10.6
......7.9...1...3..8...74...9....5.4.....5..75.6....2...1.6......23.....94...8...## 22  ED=11.8/11.8/2.6 
.2...6......1...3...9.7...5..8....57.3.....1.7...4.8....4.9.5...6.2.....9.......8## 22  ED=11.8/11.8/10.0
..34...8.......1.37........2...9.......5..8...6...7.4...51....8.7...5...9...62.5.## 22  ED=11.8/11.8/2.6 
1....6.8....7..1........5.6..9.4.....7.2...3.8....76..3....1..5.4.9.......2.7....## 22  ED=11.8/11.8/11.6
...4....9.....9.327...3.5..2......6...1.....8.3....25...41.8...6.........1.9.4...## 22  ED=11.8/11.8/2.6 
.2...6..94.7....3..9.....5..6...85..3..........1.7.......9..8.2...8.2..5....1..4.## 22  ED=11.8/11.8/2.6 
1....6....5...9.6.8..23.....9....54.3.......2.15...6..........7...37......1..4.5.## 22  ED=11.8/11.8/2.6 
1..4.......6.8...278...3....3..6...7..7..2...9......5....1..4..5......9..7...8..3## 22  ED=11.8/11.8/10.5
.2.4....9..7......6....2.5....91.....3...4..1...3..8....5....7..1..4...28.2...6..## 22  ED=11.8/11.8/11.4
.....67.....1...3...9.2...4.4..9......5..2...89......5.3.....6...8.4...29....71..## 22  ED=11.7/11.7/3.4 
.2......94...8.1....9.....6....483....16...97....1..6.3....1...5....4....72......## 22  ED=11.8/11.8/2.6 
...4...8...7..92......3...526...1.....19......7....1..5......4..1.8....3..6..29..## 22  ED=11.8/11.8/9.9 
.....6..94...8.2.....7...1.2.9...8....4.3.9...6.....5.3.8.4.....4.5......7...1...## 22  ED=11.8/11.8/3.4 
1....6.......8.2...9.7....5.7.3...5.....716....4....73..59....48...2.....3.......## 22  ED=11.8/11.8/9.8 
....5...9...7...3..8...1......3...7...8..24..6...9...5..2....548....42...14......## 22  ED=11.8/11.8/9.7 
..3..6.8....1......9..7...4...8..6..3...4...2.....5.1...2.9...373.......94....5..## 22  ED=11.8/11.8/3.4 
..3.....94...8.2...6.7...1.2...9...8..4...3.......1.5.3.8.4.....4.6......7...5...## 22  ED=11.6/11.6/2.6 
..3..6......1...3.9...7...42.....84..4..9...7..5....6........1..7..2...88.....4.2## 22  ED=11.8/11.8/10.0
...4....9....8.2..6....3.1..36..1...7.........15....7.3....5.6..6.39.8....42.....## 23  ED=11.8/11.8/8.3 
1.....7.9..6...12........4.2.7.6.....3...8.7..8.5........8.4.5.....2.9.......5.34## 23  ED=11.8/11.8/2.6 
...4....9..6....2.7...3.5......48...8..5..3...15.73.....2.....65....48...9.....1.## 23  ED=11.8/11.8/11.5
1.....78...6.8...278.....5..1.9...7...4..2.......6.......5....7....24..3.9.8..5..## 23  ED=11.8/11.8/2.6 
.....6...4...89.....823.........7.56....2.9.....6.5.1.3.9...4...7...3..1.1......5## 23  ED=11.3/11.3/2.6 
1.....78..5......6......41..3.5.......69.3...9...74.......481....23.....8...9..7.## 23  ED=11.8/11.8/2.6 
1......89........3..8...56..7..4...66.91......4...2......5...9......43.2....23..7## 23  ED=11.8/11.8/2.6 
........94....92......7..45..1.3.....7.6..9..8....7..2.3.7..8....6.1....9....5.2.## 23  ED=11.8/11.8/10.5
......7..4......23..8...5.4.1..9....3.5..8....6.1..3.....97.6......1.97......2..5## 23  ED=11.8/11.8/2.6 
..3....894.....2...89.....1.3...1..57..52.....9...3......7..6.2........8....6.54.## 23  ED=11.8/11.8/2.6 
...4...89..7..92......3...526...1.....19.....7.....1..5...9..4...6..29.....8....3## 23  ED=11.8/11.8/10.7
......7.9...1...3..8...74...9....8.5..8..5..75.6....2...2.6......13.....94...8...## 23  ED=11.8/11.8/2.6 
1...56.....71......9....1.......3..87..5..9......2..4..7..45.2...2..8..36.....5..## 23  ED=11.8/11.8/11.3
.2....78.4.7.....6.9..7..1....5....3.....1.......9.12..7..1.8..5....4.....67.3...## 23  ED=11.8/11.8/2.6 
.2.....8..56.....17...3.5.......49....5.9....9..3.7...5...7.4.....8...52.1.....6.## 23  ED=11.8/11.8/11.3
1...5.7....7.....6.8...7.4....9..3...6...4..7..8....2.5..3.....8...9.1....2..8.7.## 23  ED=11.8/11.8/2.6 
....5...9..71.9.3.6..2.3...2..6...7..4....8......9...53.2....1.....2.....8...14..## 23  ED=11.8/11.8/2.6 
.23.5...9.571.....8....3.....97....5......8......654..3....4.6..1.5....2....1....## 23  ED=11.8/11.8/2.6 
.....6.8..5.1....3..9....4.2.......553..7......8...4......64...71.23...4...7....2## 23  ED=11.8/11.8/2.6 
..34.........8...668..7.1.....5....1.9..1.6.......2..4..5.....28.....96.97.....1.## 23  ED=11.8/11.8/2.6 
.2...6..9..6...1....8.3..4.2....7..8....4.5.....1...3...2..8..78..57....97.......## 23  ED=11.6/11.6/2.6 
..34......5..89...78...2...2....5..7...62.41....9....5.......6.8...9...2..1...3..## 23  ED=11.8/11.8/2.6 
.....6.8....1..2...9..7...5..5.4...734.7.8...97.........9...6..7...3...4...2...1.## 23  ED=11.8/11.8/11.3
.2...67..4...8......9.......3.....7.5.8...34..1.3....2....9..5....6.1..3...2..6.7## 23  ED=11.8/11.8/2.6 
...45.....5...9.3.6...2...52..8.......4.6...8.3...5.1.3..5...7......79...7......1## 23  ED=11.6/11.6/7.6 
....5..8....1.9..6...3..1.4.3...14..5......2...8.......9..1.....6.9..3..8.2.73...## 23  ED=11.8/11.8/7.6 
.23.5.7...56.....37....3...2...3...63...7...5.4.9.....5...2.6.7..2....1......8...## 24  ED=11.8/11.8/10.6
.2.4..7...57..9.3.6...7......5..8.9.7...2.....4.6..3.......1..85......1...1...9.3## 24  ED=11.8/11.8/11.2
..34.67..45..8............42...6..9...1..3..6...1.......46....7.8...5.4.9...4.2..## 24  ED=11.8/11.8/10.5
...4..78.....8.26......2..5.7.3..8..5.......2..9..1..7.65...47..4.6.....9.1......## 24  ED=11.8/11.8/2.6 
coloin
 
Posts: 2456
Joined: 05 May 2005
Location: Devon

Re: The hardest sudokus (new thread)

Postby Paquita » Mon Aug 19, 2024 2:31 pm

coloin, well yes

1.3.5...9.5.1....669.73...5.......43......8..7.......1.7.6......6139....9.5..1... is B10B
I am checking them now so maybe more.
Probably these are B10B too
1.3.5...9.5.1....669.73...5.......43......8..7.......1.7.6.5....6139....9....1...
1.3.5...9.5.1....669.73...5.......43......8..7.......137.6......6139......5..1...

See my B10B files in the BxB thread : are they not new either?

I wonder if you have a collection of unpublished puzzles that you checked against my puzzles?
I do check against T&E(2), the following :

ph2010
files posted by mith or hendrik before september 2023
files posted by me in the fall of 2023
hendriks new 11.8 file
your 11.9 study
the high BxB file collection - that one is a bit unclear what the latest updates are


tell me what I am missing?
Paquita
 
Posts: 130
Joined: 11 November 2018

Re: The hardest sudokus (new thread)

Postby Paquita » Mon Aug 19, 2024 2:41 pm

Yes this is the 11.8 part of min-expands from ph2010 plus the puzzles T&E(2) published before september 2023
One thing is that if one minimal of a min-expand is published, there may still be more (unpublished) minimals.
These are also interesting to use as seed. My just-pubblished list is of unpublished MINIMALs, not the corresponding MIN-EXPANDs


Code: Select all
1...567.9...1.926.6..27..51...91...5.1.5.792.....62.17.34............5...6.7..... ED=11.8/11.8/9.3
1.3.56....5718..3.68.7.3....618.53.73.5......87.3....15.6.........5..96.......4.. ED=11.8/11.8/3.4
1.3.56....5718....68.7.3....618.53.73.5......87.3....15.6.........5..96.......4.. ED=11.8/11.1/3.4
...4...8......92..6...7...5...8...9......24...3..1...7316......57.........2.6...3 ED=11.8/11.8/11.7
1....6.8....7..1........5.6..9.4.....7.2...3.8....76..3....1..5.4.9.......2.7.... ED=11.8/11.8/11.6
1.......9..67...2..8....4......75.3...5..2....6.3......9....8..6...4...1..25...6. ED=11.8/11.8/11.6
...4....9..6....2.7...3.5......48...8..5..3...15.73.....2.....65....48...9.....1. ED=11.8/11.8/11.5
.2...67..4...8......93........9..57..1...7..2......61.3...4..6...8.......6...5.2. ED=11.8/11.8/11.5
.2.4....9..7......6....2.5....91.....3...4..1...3..8....5....7..1..4...28.2...6.. ED=11.8/11.8/11.4
..345........89......23.5...1......7..4..28..9......6...2..84..6......9..7......1 ED=11.8/11.8/11.4
....567.....1.9...6...7......4.....13...6.9...8.....2.5....73....2.....8.1.....4. ED=11.8/11.8/11.2
...4....9....8.2..6....3.1..7...5.6....9..8......2...45.8......76...1....3.....7. ED=11.8/11.8/11.1
.2.....8....7...23......5.6..4.1.....6.3....29....5....7.8...6.5....4.....1.9.... ED=11.8/11.8/10.8
...4...89..7..92......3...526...1.....19.....7.....1..5...9..4...6..29.....8....3 ED=11.8/11.8/10.7
...4.6.....6..9.2.7...1.....1..3.4....96...5.8.......7.3......8..2..49.....5...4. ED=11.8/11.8/10.6
........94....92......7..45..1.3.....7.6..9..8....7..2.3.7..8....6.1....9....5.2. ED=11.8/11.8/10.5
1..4.......6.8...278...3....3..6...7..7..2...9......5....1..4..5......9..7...8..3 ED=11.8/11.8/10.5
.2.4.........89......23.6....5....9..3..4.2..7.......1..1....5..6.3..8..9.......7 ED=11.8/11.8/10.4
....56......1....6.8.3.7....6...3..75......2...4...9...1.7....8..2....4.9.....5.. ED=11.8/11.8/10.4
.2...6......1...3...9.7...5..8....57.3.....1.7...4.8....4.9.5...6.2.....9.......8 ED=11.8/11.8/10.0
...4...8...7..92......3...526...1.....19......7....1..5......4..1.8....3..6..29.. ED=11.8/11.8/9.9
.2.4..7....6.....17...3......5....6..4.2..9.......5..8..1..8....9..7.......92.3.. ED=11.8/11.8/9.8
.2.4....9..7.8.2..6.....1.........93.....5.2..9.2..4..5....7....1.3...4...8.6.... ED=11.8/11.8/9.4
...4....9....8.2..6....3.1..36..1...7.........15....7.3....5.6..6.39.8....42..... ED=11.8/11.8/8.3
1.......9.5....2....87...4.2...3......48.5....8.6...7...6..4.5.........1....9.3.. ED=11.8/11.8/7.9
1......89.....91.3.......6...7.4....3....1..5.6.2.....5....89...4..7......26..... ED=11.8/11.8/3.4
.....678........327.....5....1.4.....9.2.....6....7.5.3....58....29......4..1.... ED=11.8/11.8/3.4
.....6.....718........2...5..85....13.....9...6.....4...2.7...8.4.....6.9.....3.. ED=11.8/11.8/3.4
1....6....5...9.6.8..23.....9....54.3.......2.15...6..........7...37......1..4.5. ED=11.8/11.8/2.6
1.....78..5......6......41..3.5.......69.3...9...74.......481....23.....8...9..7. ED=11.8/11.8/2.6
1......8......92....6.3...52....8.....5.7.....6.5....4..47...........91..3..6...7 ED=11.8/11.8/2.6
..34...8.......1.37........2...9.......5..8...6...7.4...51....8.7...5...9...62.5. ED=11.8/11.8/2.6
......7.9...1...3..8...74...9....5.4.....5..75.6....2...1.6......23.....94...8... ED=11.8/11.8/2.6
..3.5.7..4....9...6..2.......5...8.3.9.....6.8..........8.1...75....4.2.....3.5.8 ED=11.8/11.8/2.6
.2...6..94.7....3..9.....5..6...85..3..........1.7.......9..8.2...8.2..5....1..4. ED=11.8/11.8/2.6
......7.9...1...3..8...74...9....8.5..8..5..75.6....2...2.6......13.....94...8... ED=11.8/11.8/2.6
..34......5..89...78...2...2....5..7...62.41....9....5.......6.8...9...2..1...3.. ED=11.8/11.8/2.6
...4..78.....8.26......2..5.7.3..8..5.......2..9..1..7.65...47..4.6.....9.1...... ED=11.8/11.8/2.6
..34.67..45..8............42...6..9...1..3..6...1.......46....7.8...5.4.9...4.2.. ED=11.8/11.8/10.5
.23.5.7...56.....37....3...2...3...63...7...5.4.9.....5...2.6.7..2....1......8... ED=11.8/11.8/10.6
....5.7.9.5.....2.7..2..6.52.5.7..9.68.92..5...15.8...........45...9..7....3..... ED=11.8/11.2/3.4
1...56.....71......9....1.......3..87..5..9......2..4..7..45.2...2..8..36.....5.. ED=11.8/11.8/11.3
.2....78.4.7.....6.9..7..1....5....3.....1.......9.12..7..1.8..5....4.....67.3... ED=11.8/11.8/2.6
.....6.8....1..2...9..7...5..5.4...734.7.8...97.........9...6..7...3...4...2...1. ED=11.8/11.8/11.3
.....6..94...8.2.....7...1.2.9...8....4.3.9...6.....5.3.8.4.....4.5......7...1... ED=11.8/11.8/3.4
1....6.......8.2...9.7....5.7.3...5.....716....4....73..59....48...2.....3....... ED=11.8/11.8/9.8
..3..6.8....1......9..7...4...8..6..3...4...2.....5.1...2.9...373.......94....5.. ED=11.8/11.8/3.4
.2.4..7...57..9.3.6...7......5..8.9.7...2.....4.6..3.......1..85......1...1...9.3 ED=11.8/11.8/11.2
..34.........8...668..7.1.....5....1.9..1.6.......2..4..5.....28.....96.97.....1. ED=11.8/11.8/2.6
.2.....8..56.....17...3.5.......49....5.9....9..3.7...5...7.4.....8...52.1.....6. ED=11.8/11.8/11.3
....5...9...7...3..8...1......3...7...8..24..6...9...5..2....548....42...14...... ED=11.8/11.8/9.7
.2...67..4...8......9.......3.....7.5.8...34..1.3....2....9..5....6.1..3...2..6.7 ED=11.8/11.8/2.6
1...5.7....7.....6.8...7.4....9..3...6...4..7..8....2.5..3.....8...9.1....2..8.7. ED=11.8/11.8/2.6
.2.4....9..7....3.6...7.1...4......87.....5....5.1..6.3...6..5......8..2...9..... ED=11.8/11.8/10.7
...4....9.....9.327...3.5..2......6...1.....8.3....25...41.8...6.........1.9.4... ED=11.8/11.8/2.6
....5..8....1.9..6...3..1.4.3...14..5......2...8.......9..1.....6.9..3..8.2.73... ED=11.8/11.8/7.6
.2.4.6.89...1..2.6.6...214.....61..4...9.8.12...24..6.57......8.......919..8.4... ED=11.8/11.1/3.4
..3.567.9..71.9.63...73.15..3.51.69.....93......6.73.........1..7..6....84....5.. ED=11.8/11.8/3.4
1.3...7.9.57..9.3669....51.....4.....3..21.........1.336.....51.7.5..96.9.5...3.7 ED=11.8/11.8/9.3
..3..6.894.7..........23..427..6..1.3.4.12.6..16..7...6..2.1...7.1.34.....267.... ED=11.8/11.1/3.4
..3..6.894.7..........23..427..6..1.3.4.12.6..16..7...6..2.1...7.1.34.....267...1 ED=11.8/10.9/3.4
..3..6.894.7..........23..427..6..1.3.4.12.6..16..7...6..2.1...7.1.34.....267...1 ED=11.8/10.9/3.4
..3....894.7..........23..427..6..1.3.4.12.6..16..7...6..2.1...7.1.34.....267...1 ED=11.8/11.0/3.4
1...567.9...1.926.6..27..51...91...5.1.5.792.....62.17.34....7.......5...6....... ED=11.8/11.8/9.3
....5678....78.1.3...1.3.65...3.8.515...1.8.68..56.37........17.7..3....9.2....3. ED=11.8/11.8/10.5
1.3.56....5718....68.3.75.........9..3....12.....31...37.81....8.5.63....6.7.5..8 ED=11.8/11.8/9.6
....5678....78.1.3...1.3.65...3.8.515...1.8.68..56.37........17.7.......9.2...... ED=11.8/11.0/10.5
....5678....78.1.3...1.3.65...3.8.515...1.8.68..56.37........17.7.......9.2....3. ED=11.8/10.6/10.4
12..56....571.9..66.927...127.69.....917.5.....6.12.9.......8.2...5...........3.5 ED=11.8/11.8/2.6
1.3..678..57....3686...71.5.......5...86........92....6.1...5.773....8...857...13 ED=11.8/11.8/9.6
12..56....571.9..66.927...127.69.....9.7.5.....6.12.9.......8.2...5...........3.5 ED=11.8/2.0/2.0
12..56....571.9..66.927...127..9.....917.5.....6.12.9.......8.2...5...........3.5 ED=11.8/8.4/2.6
1...5678....18..36...3.75.1...8.1.75.7..35.6...576.8..34....6.....6.3....9....... ED=11.8/11.8/6.6
1..4.678.4..18..36....371.4........7.1...8....95...4.....86..7.....1364..6.7.4..3 ED=11.8/11.8/6.6
12..56....5718.2..6.87.21..2.5.17....7.6.5.2...682.........8.1.7......93.6....... ED=11.8/11.8/6.6
.2345....45.7.9...7.9.32.....5...8.6374...........5.7.53...42...4259....9.72.3... ED=11.8/11.8/2.6
..3.........1.9.3....7..4.5..5.6..787.6...3.48...7.56.36.....575.46..8.3.8....64. ED=11.8/11.8/7.1
1..4.678.4..18..36....374.1........7.4...8....95...1.....86..7.....4361..6.7.1..3 ED=11.8/11.8/6.6
12.4.6...4.6.89....9821....2.4.6...1.89.21...61.8.4.......4.9...4.....57962...... ED=11.8/11.8/2.6
12..56....571.92..6.972.1..2.5.71....7.56...2..69.2.......9...17......38.6....... ED=11.8/11.8/6.6
12.4.6...4.6.89....9821....2.4.6...1.89.21...61.8.4.........9...4.....57962...... ED=11.8/11.1/2.6
..3.........1.9.3....7..4.5..5.7..687.6...3.48...6.57.36.....575.46..8.3.8....64. ED=11.8/11.8/7.1
.2345....45.7.9...7.9.32.........8.6374.............7.53...42...4259....9.72.3... ED=11.8/11.0/2.6
.2345....45.7.9...7.9.32.....5...8.6374.............7.53...42...4259....9.72.3... ED=11.8/11.1/2.6
..3.......5.1.9.3....7..4.5..5.6...87.6...3.48...7.56.36.....575.46..8.3.8....64. ED=11.8/7.1/7.1
...4.6.....7....36.......5.24.6.7...7.8.14..2.6182......274.1...14.68...87.2.1... ED=11.8/11.8/9.3
12.4.6...4.6.89....9821....2.4.6...1.89.21...61.8.4.........9.........57962...... ED=11.8/11.0/2.6
1..........6........8....4..1.59.3.7.7.3.1.94.3..4751.....759.....9.4.73...13.45. ED=11.8/10.2/2.6
1..........6........8....4..1.59.3.7.753.1.94.3..4751.....759.....9.4.73...13.45. ED=11.8/11.8/2.6
...4.....4...89..6......14523....46..65....13..4.6.5.23.6....5451....62..42...3.1 ED=11.8/11.8/2.6
...4..7..4.......2.......46.3.1.5....41.97...9.534....3.497..5159..14.7..175.3... ED=11.8/11.8/10.4
...4.....4...89.36......14523....46..65....13..4.6.5.23.6....5451....62..42...3.1 ED=11.8/11.8/2.6
............1.9.3....37.5.4.6......75.4...6.887..6.3..34.....657.56..8.3.865..47. ED=11.8/7.2/3.4
..........5.1.9......37.5.4.6......75.4...6.887..6.3..34.....657.56..8.3.865..47. ED=11.8/10.5/3.4
...4.....4...89.........14523....46..65....13..4.6.5.23.6....5451....62..42...3.1 ED=11.8/11.0/2.6
12..56....571.9...6.972....2.169.....95.17...76...2.9.572..............5......34. ED=11.8/10.4/2.6
...4.....4...89.3.......14523....46..65....13..4.6.5.23.6....5451....62..42...3.1 ED=11.8/11.0/2.6
12..56....571.9...6.972....2.169.....95.17...76...2.9.572..............5.1....34. ED=11.8/11.8/2.6
...4.....4...89.........51423....64...4.6..53.65...1.23.2...4.151....36..46....25 ED=11.8/11.0/2.6
...4.....4...89..6......51423....64...4.6..53.65...1.23.2...4.151....36..46....25 ED=11.8/11.8/2.6
...4.....4...89.3.......51423....64...4.6..53.65...1.23.2...4.151....36..46....25 ED=11.8/11.0/2.6
...4.....4...89.36......51423....64...4.6..53.65...1.23.2...4.151....36..46....25 ED=11.8/11.8/2.6
1..4.........8.......2......1..3..5636....87.5.7...1.36.13..5.883...5.67.75..831. ED=11.8/11.0/10.5
1..4.........8.......2......1..3..5636....87.5.7...1.36.13..5.883...5.67.756.831. ED=11.8/11.1/10.4
1..4.........8.......2......1..6..5336....87.5.7...1.66.13..5.883...5.67.756.831. ED=11.8/11.1/10.4
1..4.........8.......2......1..6..5336....87.5.7.3.1.66.13..5.883...5.67.756.831. ED=11.8/11.8/10.6
..3..6......1...3.9...7...42.....84..4..9...7..5....6........1..7..2...88.....4.2 ED=11.8/11.8/10.0
.2.....894......3...9.7.5......6.9..3.......2.8...2.4...16......7..1..9....5..1.. ED=11.8/11.8/2.6
.2......94...8.1....9.....6....483....16...97....1..6.3....1...5....4....72...... ED=11.8/11.8/2.6
.....6.8..5.1....3..9....4.2.......553..7......8...4......64...71.23...4...7....2 ED=11.8/11.8/2.6
......7..4......23..8...5.4.1..9....3.5..8....6.1..3.....97.6......1.97......2..5 ED=11.8/11.8/2.6
..3....894.....2...89.....1.3...1..57..52.....9...3......7..6.2........8....6.54. ED=11.8/11.8/2.6
1......89........3..8...56..7..4...66.91......4...2......5...9......43.2....23..7 ED=11.8/11.8/2.6
1.....7.9..6...12........4.2.7.6.....3...8.7..8.5........8.4.5.....2.9.......5.34 ED=11.8/11.8/2.6
.23.5...9.571.....8....3.....97....5......8......654..3....4.6..1.5....2....1.... ED=11.8/11.8/2.6
1.....78...6.8...278.....5..1.9...7...4..2.......6.......5....7....24..3.9.8..5.. ED=11.8/11.8/2.6
12..56..9.571.9..66.927...52.....3........8.........5..7259......16.7...96..12... ED=11.8/10.2/2.6
12..567.9.571.9..66.927...52.....3........8.........5..7259......16.7...96..12... ED=11.8/11.8/2.6
...45.7.9..71.92....9.72.51.1.5.79.474.29.51.9...41.723..........4......89.....2. ED=11.8/11.8/10.5
.234..7.94..............154...51.87.....479.5...9.8.41...87.49.....95.17.7...45.8 ED=11.8/11.8/2.6
..34.6.8.4.7.89...68.73.....68.4397.73.69.84.9.48.76..........8.......2..7.....5. ED=11.8/11.8/2.6
..34.678...718..638.6.371.4.8..143.6...76.81....3.8.4.5.......1.7.......9........ ED=11.8/11.8/2.6
..34.6...4.7.89...68.73..4..68.439..73.69.8.49.48.76.........9.........2.7......5 ED=11.8/11.8/2.6
..34.6...4.7.89...68.73.....68.439..73.69.8.49.48.76.........9.........2.7......5 ED=11.8/11.8/2.6
..34.678...718..638.6.371.4....143.6...76.81....3.8.4.5.......1.7.......9........ ED=11.8/11.8/2.6
..34.678...718..63..6.371.4....143.6...76.81....3.8.4.5.......1.7.......9........ ED=11.8/10.2/2.6
..34.6...4.7.89...68.73.....68.439..73.69.8..9.48.76.........9.........2.7......5 ED=11.8/10.2/2.6
..34.6.8.4.7.89...68.73.....68.439..73.69.84.9.48.76..........8.......2..7.....5. ED=11.8/10.4/2.6
.234....94..............154...51.87.....479.5...9.8.41...87.49.....95.17.7...45.8 ED=11.8/10.4/2.6
.23......4..............451...54.87.....179.5...9.8.14...87.19.....95.47.7...15.8 ED=11.8/10.2/2.6
.23.....94..............451...54.87.....179.5...9.8.14...87.19.....95.47.7...15.8 ED=11.8/11.8/2.6
...45.7.9..71.92....9.72.51.1.7.59.474.29.51.....41.723..........4......8......2. ED=11.8/11.7/10.6
...4..7..4.......2.......46.17.94.5.3.4....9159.1.3....3..15....419.7...9.534.... ED=11.8/11.8/2.6
...4..7..4.......2.......46.17.94.5.3.457..9159.1.3....3..1.....419.7...9.534.... ED=11.8/2.0/2.0
....5.......1.9.3....37.5.4.6......75.4...6.887....3..34.....657.6...8.3.8.6..47. ED=11.8/10.6/3.4
....5.......1.9......37.5.4.6......75.4...6.887..6.3..34.....657.6...8.3.8.6..47. ED=11.8/11.1/3.4
.23.....94....9.........451...54.87.....179.5...9.8.14...87.19.....95.47.7...15.8 ED=11.8/11.8/2.6
............1.9.3....37.5.4.6......75.4...6.887..6.3..34.....657.65..8.3.856..47. ED=11.8/7.2/3.4
1.3.567...5718..3.68.3.7................78.61...6..42.51..6...37.8.35....3...1... ED=11.8/7.2/3.4
1.3.567...5718..3.68.3.7................78.61.7....42.51..6...37.8.35....3...1... ED=11.8/10.6/3.4
..........5.1.9......37.5.4.6......75.4...6.887..6.3..34.....657.65..8.3.856..47. ED=11.8/10.5/3.4
1.3.56....5718..3.68.3.7................78.61.7....42.51.76...37.8.35....3.8.1... ED=11.8/10.6/8.8
..........5.1.9......37.5.4.6.....575.4...6.887..6.34.34.....657.6...8.3.856..47. ED=11.8/10.6/8.8
1.3.56....5718..3.68.3.7.................8.61.7.6..42.51.76...37.8.35....3.8.1... ED=11.8/11.0/10.3
..........5.1.9.3....37...4.6.....575.4...6.887..6.34.34.....657.6...8.3.856..47. ED=11.8/10.6/10.3
............1.9.3....37.5.4.6.....575.4...6.887..6.34.34.....657.6...8.3.856..47. ED=11.8/7.2/7.2
1.3.56....5718..3.68.3.7................78.61...6..42.51.76...37.8.35....3.8.1... ED=11.8/7.2/7.2
....5.....5.1.9.3....37.5.4.6.....575.4...6.887....34.34.....657.6...8.3.856..47. ED=11.8/10.5/9.4
....5.....5.1.9......37.5.4.6.....575.4...6.887..6.34.34.....657.6...8.3.856..47. ED=11.8/10.6/8.8
....5.......1.9.3....37.5.4.6.....575.4...6.887....34.34.....657.6...8.3.8.6..47. ED=11.8/10.6/9.4
....5.......1.9......37.5.4.6.....575.4...6.887..6.34.34.....657.6...8.3.8.6..47. ED=11.8/11.0/9.0
1.3.56.8..5718..3.68.3.7................78.61.7....42.51..6...37.8.35....3...1... ED=11.8/10.5/3.4
..........5.1.9......37.5.4.6......75.4...6.887..6.3..34.....657.6..48.3.856..47. ED=11.8/10.6/3.4
1.3.56.8..571...3.6..3.7................78.61...6..42.51..6...37.8.35....3...1... ED=11.8/7.2/2.6
............1.9.3....37.5.4.6......75.4...6.887..6.3..3......657.6..48.3.856...7. ED=11.8/7.2/2.6
..........5.1.9.3....37.5.4.6......75.4...6.887..6.3..3......657.6..48.3.856...7. ED=11.8/7.2/2.6
1.3.56.8..571...3.6..3.7................78.61.7.6..42.51..6...37.8.35....3...1... ED=11.8/7.2/2.6
..34.6.8.4.7.89...68.73.....68.4397.73.89.64.9.46.78..........8.......2..7.....5. ED=11.8/11.8/2.6
..34.6.8.4.7.89...68.73.....68.439..73.89.64.9.46.78..........8.......2..7.....5. ED=11.8/10.4/2.6
...4.678....18.2.6....72.14.19...6......21.....5..........68...7..2.48....271.46. ED=11.8/11.8/3.4
..34.6...4.7.89...68.73.....68.439..73.89.6..9.46.78.........9.........2.7......5 ED=11.8/10.2/2.6
..34.6...4.7.89...68.73.....68.439..73.89.6.49.46.78.........9.........2.7......5 ED=11.8/11.8/2.6
..34.6...4.7.89...68.73.....68.479..73.89.6.49.46.38.........9.........2.7......5 ED=11.8/11.8/2.6
..34.6...4.7.89...68.73..4..68.439..73.89.6.49.46.78.........9.........2.7......5 ED=11.8/11.8/2.6
..34.6...4.7.89...68.73.....68.479..73.89.6..9.46.38.........9.........2.7......5 ED=11.8/10.2/2.6
..34.6...4.7.89...68.73..4..68.479..73.89.6.49.46.38.........9.........2.7......5 ED=11.8/11.8/2.6
12..5..........2.66...3....2.....8.7.8.....24.7....16.76..24...8.4..16.2.12..847. ED=11.8/11.8/2.6
.2345...945...92.36.9......2..6.5.9...592....9.6.34.2.364.......9....1.8......... ED=11.8/11.8/2.6
...4.6...4...8923.9.832...4.8.6.49.3.....284..4.8...625.1.4................963... ED=11.8/11.8/2.6
.....6.8...6...1.2...2....4.3...75..5...9......85...1...28...4..7..3....9....5... ED=11.8/11.8/11.3
1......89....8.12.......5..2...9...8.7...4.....53.......4..7....3.5.....9...1..6. ED=11.8/11.8/10.8
....567.9.5.78..3.7..1.......5.4....3.8....4..4....2.....9..6........3.1.3..2..5. ED=11.8/11.8/10.0
...4....9....8...6.....215.2....7.1...9.4....71.......53.....7..7...3.....6...3.8 ED=11.8/11.8/2.6
..3....894.7..........23..427..6..1.3.4.12.6..16..7...6..2.1...7.1.34.....267.... ED=11.8/11.1/3.4
.2.4.6.89...1..2.6.6....14.....61..4...9.8.12...24..6.57.....28.......919..8.4... ED=11.8/10.5/3.4
.2.4.6.89...1..2.6.6...214.2...61..4...9.8.12...24..6.57......8.......919..8.4... ED=11.8/11.0/3.4
.2.4.6.89...1..2.6.6...214.....61..4...9.8.12...24..6.57.6....8.......919..8.4... ED=11.8/11.1/3.4
.2.4.6.89...1..2.6.6...214.2...61..4...9.8.12...24..6.57.6....8.......919..8.4... ED=11.8/10.9/3.4
.2.4.6.89...1..2.6.6....14.....61..4...9.8.12...24..6.57.6...28.......919..8.4... ED=11.8/10.4/3.4
.2.4.6.89...1..2.6.6...214.2...61..4...9.8.12...24..6.57.....28.......919..8.4... ED=11.8/11.0/3.4
1..4.........8.......2......3.....565.7...1.361....87.3.16.75.886...5.17.75..836. ED=11.8/11.8/2.6
.2.4.6.89...1..2.6.6...214.2...61..4...9.8.12...24..6.57.6...28.......919..8.4... ED=11.8/11.6/3.4
1..4.........8.......2......3.....565.7...1.361....87.3.1..75.886...5.17.75..836. ED=11.8/10.2/2.6
1.3....894.7..........23..427..6..1.3.4.12.6..16..7...6..2.1...7.1.34.....267...1 ED=11.8/11.0/3.4
1.3....894.7..........23..427..6..1.3.4.12.6..16..7...6..2.1...7.1.34.....267.... ED=11.8/11.1/3.4
1.3..6.894.7..........23..427..6..1.3.4.12.6..16..7...6..2.1...7.1.34.....267.... ED=11.8/11.2/3.4
1.3..6.894.7..........23..427..6..1.3.4.12.6..16..7...6..2.1...7.1.34.....267...1 ED=11.8/11.6/3.4
12....7.9.56...12.7.9....65...3.8.9........17.9..7.....1.5..6.256.2..97.9.2....51 ED=11.8/11.8/10.2
12....7.9.56...12.7.9....65...3.8.9........17....7.....1.5..6.256.2..97.9.2....51 ED=11.8/10.6/10.4
12....7.9.56...12.7.9....65...3.8..........17....7.....1.5..6.256.2..97.9.2....51 ED=11.8/10.6/10.5
......7.....1.9.36....3.4.52.6.......193.2...73.6......7..61.2..629.3.7...172.... ED=11.8/2.0/2.0
..3...7.....1.9.36....3.4.52.........193.2...73.6......7..61.2..629.3.7...172.... ED=11.8/9.1/3.4
....567..4..........932.....74..59.886.....759.....46..4.....97....9.8.4.98...65. ED=11.8/3.4/3.4
..3.........1.9.36...7..4.5..5.6..787.6...3.48...7.56.36.....575.46..8.3.8....64. ED=11.8/11.8/7.1
....567.94..........932.....74..59.886.....759.....46..4.....97....9.8.4.98...65. ED=11.8/3.4/3.4
...4.6.....7....36.......5.24...7.1.7.8.14..2.6182...4..274.1...14.68...87.....4. ED=11.8/7.1/7.1
..3.........1.9.36...7..4.5..5.7..687.6...3.48...6.57.36.....575.46..8.3.8....64. ED=11.8/11.8/7.1
..3.......5.1.9.3....7..4.5..5.7..687.6...3.48...6.57.36.....575.46..8.3.8....64. ED=11.8/11.8/7.1
...4.6.....7....36.......5.24...7.1.7.8.14..2.6182......274.1...14.68...87.....4. ED=11.8/7.1/7.1
Paquita
 
Posts: 130
Joined: 11 November 2018

Re: The hardest sudokus (new thread)

Postby Paquita » Mon Aug 19, 2024 4:10 pm

Yes and these are also B10B, at least the first 3 - still calculating

1...567....718....68.3.75.........4.36....8.7........251..3....7.8.65....368.1..5
1...567...5.18....68.3.75.........4.36....8.7........251..3....7.8.65....368.1..5
....567....718....68.3.75.........4.361...8.7........251..3....7.8.65....368....5
....567...5.18....68.3.75.........4.361...8.7........251..3....7.8.65....368....5

when it is done I will post an update in het BxB thread
Paquita
 
Posts: 130
Joined: 11 November 2018

Re: The hardest sudokus (new thread)

Postby m_b_metcalf » Mon Aug 19, 2024 7:24 pm

Note that two of your puzzles can be morphed into anti-diagonal symmetrical patterns. They would have been ideal for the ill-fated Patterns Game!

Code: Select all
 . . 8 5 . . . . 1
 3 . . . . . 9 . .
 . 6 . . . . . 4 .
 . . . . . 6 . . .
 . . 7 1 8 . . . .
 . . . . 2 . . . 5
 . . 2 . 7 . . . 8
 9 . . . . . 3 . .
 . 4 . . . . . 6 .

 . 2 . 4 . . . . 9
 6 . . . 7 . 1 . .
 . . 7 . . . . 3 .
 . . . 9 . . . . .
 3 . . . 6 . . 5 .
 . . . . . 8 . . 2
 7 . . . . . 5 . .
 . 4 . . . . . . 8
 . . 5 . 1 . . 6 .


Regards,

Mike
User avatar
m_b_metcalf
2017 Supporter
 
Posts: 13601
Joined: 15 May 2006
Location: Berlin

Re: The hardest sudokus (new thread)

Postby m_b_metcalf » Tue Aug 20, 2024 12:10 pm

m_b_metcalf wrote:Note that two of your puzzles can be morphed into anti-diagonal symmetrical patterns. They would have been ideal for the ill-fated Patterns Game!

It turns out that first of these patterns did appear in the Patterns Game, #169.

Mike
User avatar
m_b_metcalf
2017 Supporter
 
Posts: 13601
Joined: 15 May 2006
Location: Berlin

Re: The hardest sudokus (new thread)

Postby Paquita » Thu Aug 22, 2024 7:36 pm

Nice!

Sorry I don't have records of the Patterns Game puzzles.
More and more a proper database of what puzzles are known, is missed - at least by me.
Paquita
 
Posts: 130
Joined: 11 November 2018

Re: The hardest sudokus (new thread)

Postby eleven » Fri Aug 23, 2024 8:39 pm

If a solver knows the tridagon pattern, the list contains trivial puzzles like this one
Code: Select all
..3..6.894.7..........23..427..6..1.3.4.12.6..16..7...6..2.1...7.1.34.....267....

and extremely hard ones like the two shown by Mike.
Same old story.

[Added:] Note: if the only givens of 2 digits are in the same box - and one is missing, check for a tridagon in the opposite boxes (those not in the same band/stack).
In the sample:
Code: Select all
+-------+-------+-------+
 | . . 3 | . . 6 | . 8 9 |
 | 4 . 7 | . . . | . . . |
 | . . . | . 2 3 | . . 4 |
 +-------+-------+-------+
 | 2 7 * | . 6 ° | . 1 . |
 | 3 * 4 | ° 1 2 | . 6 . |
 | * 1 6 | . x 7 | . . . |
 +-------+-------+-------+
 | 6 . ° | 2 * 1 | . . . |
 | 7 ° 1 | * 3 4 | . . . |
 | ° . 2 | 6 7 * | . . . |
 +-------+-------+-------+

5 not given, 8 and 9 are only given once in box 3. Now look at boxes 4578:
You immediately have 589 candidates in boxes 48, and also in the diagonal cells of box 7. In box 5 in r4c6 and r5c4 (all seeing 123467). These cells have (only) one rectangle (r58c24). So r6c5 cannot be 589 and must be 4.
eleven
 
Posts: 3121
Joined: 10 February 2008

Previous

Return to General