## Maximum number of clues for a given SE rating

Everything about Sudoku that doesn't fit in one of the other sections
Code: Select all
`6....245952..4..1...35..2..3..1945...1.658.34..5273..1..4..51...3..2..4575.4....8`

39 clues, ER 9.2

Code: Select all
`6....245952..4..1..435..2..3..1945...1.658.344.5273..1..4..51...3..2..4575.4....8`

41 clues, ER 8.9

Code: Select all
`6....245952..4..1..435..2..3..1945.221.658.344.5273..1..4..512..3..2..457524....8`

45 clues, ER 8.3
Once upon a time I was a teenager who was active on here 2007-2011
ocean and eleven should have paired up to make a sudoku-solving duo called Ocean's Eleven
999_Springs

Posts: 473
Joined: 27 January 2007
Location: In the toilet, flushing down springs, one by one.

Code: Select all
`219|356|784843|..7|659657|498|2..---+---+---198|74.|5.6432|561|978765|8.9|.4.---+---+---976|.85|4..321|974|865584|6..|.97ER=2.6, 66 clues`

This was found manually (I don't have any sort of computer programming knowledge whatsoever) and took me 1.5 hours.

Eioru, in your collaboration of ratings you missed the 7.0 puzzle on page 4:

Code: Select all
`.13|4.7|825 ..4|8.2|631 28.|1.3|947 ---+---+--- ...|.24|318 342|918|756 8.1|.36|294 ---+---+--- 429|671|583 .38|245|1.9 1..|389|4.2 ER=7.0, 63 clues`
Once upon a time I was a teenager who was active on here 2007-2011
ocean and eleven should have paired up to make a sudoku-solving duo called Ocean's Eleven
999_Springs

Posts: 473
Joined: 27 January 2007
Location: In the toilet, flushing down springs, one by one.

Currently Result
Improve 3.4 5.8 7.5 8.3
rating |clues
-------+-------------
1.0 | 80 |
1.2 | 77 |
1.5 | 65 | 3.51482.9.18293.4.94256738142635189718762945359387461225.786.3..3.415.288..932...
1.7 | 56 | 568.4.132791283645423165...614...52.2.5.14..69.752641.1764.2.5..596.12.4.42.5..61
2.0 | 69 | 437691825268537941159842763892..5.3.615..3.8.743..8.5.326789514574316298981254376
2.3 | 62 | 327415698159862347684...25194.....7571.....2353.....69893..4716475186932261937584
2.5 | 57 | ...4..185..41..937..1...642...7..451.1..4.273.4.231869459617328182354796376928514
2.6 | 66 | 219356784843..76596574982..19874.5.64325619787658.9.4.976.854..3219748655846...97
2.8 | 57 | ..4.5678969.7.8.4557849.6..45.9378.68.9264.57.6758149..4..795689.68.5.7478564.9..
3.0 | 58 | 3517426894961832577826593411453....6967...53.2385....4513......82493...56798.54.3
3.2 | 63 | 18.2.79.5.59..1827.72589.1.7186245932649531789357182..89.1.57.2521.76.89.47892.51
3.4 | 58 | ..2...4131...2.689...1..257.1927.36572....891....91724985742136237916548641385972
3.6 | 54 | ......387....7.659.798.3421..5.3.946.6....735.....5812257389164498516273316247598
3.8 | 56 | 415.69.8767.85.4.9.894.7.6595.64287.8.7.956.4.647.895..9.5847.67.89.654.546.7..98
4.0 |
4.2 | 70 | 96173254884395672172581463919467385268752.3.4352..8.67419385276238.67..55762...83
4.4 | 66 | 3495812676283975145714629384537296817861..492912.4.753165..4..92379...46894.....5
4.5 | 62 | 239514678.54...213.61...59412736548969874135254392816748....73.972...84.31.48792.
4.6 | 60 | 421378965587629..1396..4872264.831.717..62.8383....2.67428..6.9618....24953246718
4.69 | 42 | ....291.....6189..196.458.24.15..29.5...8.4.7.6...45.3..84..6296....73..9.486.751
4.7 |
4.8 | 48 | 1.345.7...4..21...6.97831.4...3.8...234.7.518...2.5...875192436391.64.7.462.379.1
4.89 | 38 | 6.7381.....1.2.3...4395761....7.8....7916584....2.37...64.3219...8.195......7....
4.9 | 36 | 1.2.3.4.5.73..58..485691..7..8.1.7..7...8...6..1...98.8..9.2..3.........3.71645.8
5.0 |
5.1 | 46 | ...1237..7..465.....3..76.4476.12.353.15.647225.734.61..76415.....258..7...379..6
5.2 | 58 | 4.5.67.8967..894.589.4.567.568942..77245..8969..678542157.94.68.498.675..8675.9.4
5.4 | 46 | 63214597881..9...4.4..8..1....85....16.274......96....481529.6.753416..9296738.4.
5.6 | 70 | 12345678945678912378913256423.9.58.66.52.893.8973612453625174985.86943.29..82365.
5.7 | 64 | 738421695692...418451...732314782569826...347975...8212479531861832..954569...273
5.8 | 60 | ...647981.1.2836577865913246423581795...29846..8.645328..4.2765.6.9.5218...8.6493
5.9 | 56 | 974...123612347589835..9674.6......8.4..9.2.5.2...1..7751964832293..8456486532791
6.0 | 55 | .54672.1.617.985.29..5...765.928..67...75.....7.....58463825791781934625295167384
6.1 | 60 | 528...341931524786476381592.19...85..64...17..53...62.195438267382976415647...938
6.2 | 64 | 259641738743985126681372..4896513247537264...412897...92473....37815.4.216542..7.
6.5 | 58 | ..4.5678969.7.8.4557849.6.245.9.78.68.9.64.57.6758.49114..795689.68.5.7478564.9.3
6.6 | 66 | 453219786628735491197846325379..2..8215.879.3864..32.7732..18.4981.74.32546328179
6.69 | 46 | .531..8.6.81569.3.26.....51.964.1.7..7.....1.14.375.6.62....185.352186.7817.5.32.
6.7 | 64 | 12.689.7586.735..175.142...385274169942561738671398.5.438926517596417...217853...
6.8 | 62 | 6..1..38..3.5.8.1..183...9.8..613472421875936367924158146789523273451869.8.236741
6.9 | 65 | ..2.4.658....6.42346.25.971.4.532769926487135...619284685124397319876542274395816
7.0 | 63 | .134.7825..48.263128.1.3947....243183429187568.1.36294429671583.382451.91..3894.2
7.1 | 65 | 642319578187...439359...261914283657276...8935389..142721495386493...715865.3.924
7.2 | 66 | .6..92.84..4.16.35....54.96126935478759428361843167952...243617632571849417689523
7.3 | 61 | 371542986682...345459...217914376528768...13.523...76.135984672247...893896...451
7.4 | 36 | 57.3.1.6893.7.8.54.........79.....45.........86.....326.7......42.6.7.8131.2.5.76
7.5 | 52 | ......217....5.8348..3..659..8...57127....946......382582941763746523198931786425
7.6 | 57 | .45.67.896.78.94.589.45.67.4..57.896.69..8547578946123.5479..6878.6.495.9.6.857.4
7.7 | 57 | 4.5.67.8967..894.589.4.567.568.94..77.45..8969..67854.15794..682498.675.38675.9.4
8.3 | 57 | ....472969...8.4574..5.9831..4...789.9...8164....94523549876312638412975721935648
8.9 | 41 | 6....245952..4..1..435..2..3..1945...1.658.344.5273..1..4..51...3..2..4575.4....8
9.2 | 39 | 6....245952..4..1...35..2..3..1945...1.658.34..5273..1..4..51...3..2..4575.4....8
11.2 | 37 | 6....2.5952..4..1...35..2..3..1945...1.658.3...5273..1..4..51...3..2..4575.4....8
Eioru

Posts: 182
Joined: 16 August 2006

999_Springs wrote:[edit: Oh dear. Your 7.7 puzzle is so hard that it froze SE on my computer for 4 minutes!]

Code: Select all
`2.4|56.|789.69|.78|.45578|.49|3.6---+---+---6..|.54|89779.|68.|5.4485|9.7|.6.---+---+---8.6|79.|45..57|4.6|9.894.|8.5|67.`
Eioru

Posts: 182
Joined: 16 August 2006

The following puzzles have been solved up until the start of non-single moves
Code: Select all
`. . 8|. 6 2|. . 5. 2 .|8 5 .|. 6 .6 . 5|7 9 1|8 . 2-----+-----+-----. . 6|2 . 8|. 5 18 5 .|. 1 6|. 2 .3 1 2|9 . 5|6 8 .-----+-----+-----5 6 .|1 . 9|2 . 8. 8 .|5 2 .|. 1 62 . 1|6 8 .|5 . . ER=7.9 48 clues. . 9|. 5 2|. . 3. 2 .|9 3 .|. 5 .5 . 3|6 7 .|9 . 2-----+-----+-----. . 5|2 . 9|. 3 49 3 .|. 4 5|. 2 .1 4 2|7 . 3|5 9 .-----+-----+-----. 5 .|. . 7|2 . 9. 9 .|. 2 .|. 6 52 . .|5 9 6|3 . . ER=8.8 44 clues`
I'm sure there are better out there

tarek

tarek

Posts: 2978
Joined: 05 January 2006

Now I have got these outrageously annoying things called exams out of the way for some time, I can start reposting...
Code: Select all
`6....2.59592.4..1...35.92..3..1945...1.658.3...5273..1..4..51...3..2..4575.4...28`
40 clues, ER 9.1
(This was found completely by accident when I tried to enter Mauricio's 37 clue puzzle into SE and I made a mistake!)
Code: Select all
`6....2.59592.4.81...35.92..3..1945...1.658.3...5273..1..4..51...3..2..4575.4...28`
41 clues, ER 8.4
Code: Select all
`6....2.59592.4.81...35.92..3..19458..1.658.3...5273..1..4..51...3..2..4575.4...28`
42 clues, ER 8.2
Code: Select all
`6....2.5952..4..1...35..2.73..1945...1.658.3...5273..1..4..51...3..2..4575.4....8`
38 clues, ER 9.0
Code: Select all
`6....2.59572.4..1...35..2..3..1945...1.658.3...5273..1..4..51...3..2..4575.4...28`
39 clues, ER 8.9 (Is this rating a mistake? I went through the puzzle and the 8.9 dynamic chain isn't dynamic at all.)

999_Springs wrote:
Eioru wrote:I think this

Bidirectional Y-Cycle 6.7
Forcing X-Chain 6.7 becomes 6.69

So, in that case...

Code: Select all
`(one of wapati's puzzles) .7.6.3958 .968.7.13 3.8....76 .6749.832 8..732.69 932.8674. 7.3...684 42..68397 689374.2. ER=6.69, 55 clues `

You missed the puzzle in your collaboration of ratings.
Once upon a time I was a teenager who was active on here 2007-2011
ocean and eleven should have paired up to make a sudoku-solving duo called Ocean's Eleven
999_Springs

Posts: 473
Joined: 27 January 2007
Location: In the toilet, flushing down springs, one by one.

6.5 -- 56 clues
Code: Select all
` . 4 5 . 6 7 . 8 9  6 . 7 8 . 9 4 . 5  8 9 . 4 5 . 6 7 .  4 . . 5 7 8 . 9 6  5 . 6 . 9 4 7 . 8  7 8 9 2 . 6 5 4 .  9 6 8 7 . . . 5 4  . 5 4 6 8 . 9 . 7  1 7 . 9 4 5 8 6 . `

Not improve results,
not 6.6 6.7 7.6 7.7 in SE rating,

and two 6.5 Bidirectional X-Cycles took my SE many time analysing.
Eioru

Posts: 182
Joined: 16 August 2006

Eioru wrote:7.4 | 36 | 57.3.1.6893.7.8.54.........79.....45.........86.....326.7......42.6.7.8131.2.5.76

It's only got 34 clues.
But you can put a 5 in r3c5 and keep the rating the same.

Eioru wrote:7.2 | 66 | .6..92.84..4.16.35....54.96126935478759428361843167952...243617632571849417689523

It's only got 65 clues.
Once upon a time I was a teenager who was active on here 2007-2011
ocean and eleven should have paired up to make a sudoku-solving duo called Ocean's Eleven
999_Springs

Posts: 473
Joined: 27 January 2007
Location: In the toilet, flushing down springs, one by one.

Code: Select all
`893475162215396847476281359.3.8.271.768513294.2.....8338..5.42.657124938.42.38.7.           ER=4.5    63clues`
Eioru

Posts: 182
Joined: 16 August 2006

Code: Select all
`.6.278.958.94356.757.691.8..9578..6.7.6..985..8.5.67.9.57964..89.8..75.66..85.97.             ER=7.8         50 clues`

Code: Select all
`.62.78.958.93.56.757.69..8..95784.6.7.6..985..8.5.67.9.5796...89.8..75.66..85.97.             ER=9.0         49 clues`
Eioru

Posts: 182
Joined: 16 August 2006

Code: Select all
`.4.|731|.9.1..|...|...9.7|8..|...---+---+---486|357|912752|914|836319|268|547---+---+---5.3|182|4.9..1|...|....94|673|.5.ER=4.0, 50 clues`

Code: Select all
`219|356|784 843|..7|659 657|498|2.. ---+---+--- 398|74.|5.6 421|563|978 765|8.9|.4. ---+---+--- 976|.85|4.. 132|974|865 584|63.|.97 ER=1.5, 67 clues`
Once upon a time I was a teenager who was active on here 2007-2011
ocean and eleven should have paired up to make a sudoku-solving duo called Ocean's Eleven
999_Springs

Posts: 473
Joined: 27 January 2007
Location: In the toilet, flushing down springs, one by one.

daj95376 in the contrary 17 puzzles wrote:
Code: Select all
` +-----------------------------------------------------+  |  7    3    1    |  5    2    6    |  9    8    4    |  |  5    48   468  |  9    17   148  |  67   3    2    |  |  468  9    2    |  3    47   48   |  67   1    5    |  |-----------------+-----------------+-----------------|  |  468  48   3    |  1    456  45   |  2    7    9    |  |  9    5    7    |  2    8    3    |  4    6    1    |  |  1    2    46   |  7    46   9    |  8    5    3    |  |-----------------+-----------------+-----------------|  |  2    7    9    |  8    15   15   |  3    4    6    |  |  3    6    5    |  4    9    7    |  1    2    8    |  |  48   1    48   |  6    3    2    |  5    9    7    |  +-----------------------------------------------------+ `

ER=4.6, 62 clues

Eioru wrote:6.6 | 66 | 453219786628735491197846325379..2..8215.879.3864..32.7732..18.4981.74.32546328179

It's got 67 clues.

Eioru wrote:8.3 | 57 | ....472969...8.4574..5.9831..4...789.9...8164....94523549876312638412975721935648

8.3 | 58 | ....472969...8.45747.5.9831..4...789.9...8164....94523549876312638412975721935648
Once upon a time I was a teenager who was active on here 2007-2011
ocean and eleven should have paired up to make a sudoku-solving duo called Ocean's Eleven
999_Springs

Posts: 473
Joined: 27 January 2007
Location: In the toilet, flushing down springs, one by one.

in the Patterns Game (game 72), Mauricio wrote:000102030300000400051004600705208006000000000400709108004600510006000003030905000 10.2/1.2/1.2

After singles, turbot fish and singles:
Code: Select all
`64.|1.2|.353..|...|4.1.51|..4|6..---+---+---7.5|2.8|..6...|...|...4..|7.9|1.8---+---+---..4|6..|51.5.6|...|..313.|9.5|.64ER=10.2, 36 clues`
Once upon a time I was a teenager who was active on here 2007-2011
ocean and eleven should have paired up to make a sudoku-solving duo called Ocean's Eleven
999_Springs

Posts: 473
Joined: 27 January 2007
Location: In the toilet, flushing down springs, one by one.

ER |clues
----+-------------
1.0 | 80 |
1.2 | 77 |
1.5 | 67 |
1.7 | 56 | 568.4.132791283645423165...614...52.2.5.14..69.752641.1764.2.5..596.12.4.42.5..61
2.0 | 69 | 437691825268537941159842763892..5.3.615..3.8.743..8.5.326789514574316298981254376
2.3 | 62 | 327415698159862347684...25194.....7571.....2353.....69893..4716475186932261937584
2.5 | 57 | ...4..185..41..937..1...642...7..451.1..4.273.4.231869459617328182354796376928514
2.6 | 66 | 219356784843..76596574982..19874.5.64325619787658.9.4.976.854..3219748655846...97
2.8 | 57 | ..4.5678969.7.8.4557849.6..45.9378.68.9264.57.6758149..4..795689.68.5.7478564.9..
3.0 | 58 | 3517426894961832577826593411453....6967...53.2385....4513......82493...56798.54.3
3.2 | 63 | 18.2.79.5.59..1827.72589.1.7186245932649531789357182..89.1.57.2521.76.89.47892.51
3.4 | 58 | ..2...4131...2.689...1..257.1927.36572....891....91724985742136237916548641385972
3.6 | 54 | ......387....7.659.798.3421..5.3.946.6....735.....5812257389164498516273316247598
3.8 | 56 | 415.69.8767.85.4.9.894.7.6595.64287.8.7.956.4.647.895..9.5847.67.89.654.546.7..98
4.0 | 50 | .4.731.9.1........9.78.....4863579127529148363192685475.31824.9..1.......94673.5.
4.2 | 70 | 96173254884395672172581463919467385268752.3.4352..8.67419385276238.67..55762...83
4.4 | 66 | 3495812676283975145714629384537296817861..492912.4.753165..4..92379...46894.....5
4.5 | 63 | 893475162215396847476281359.3.8.271.768513294.2.....8338..5.42.657124938.42.38.7.
4.6 | 62 | 7315269845..9...32.923...15..31..27995728346112.7.98532798..346365497128.1.632597
4.69| 42 | ....291.....6189..196.458.24.15..29.5...8.4.7.6...45.3..84..6296....73..9.486.751
4.7 |
4.8 | 48 | 1.345.7...4..21...6.97831.4...3.8...234.7.518...2.5...875192436391.64.7.462.379.1
4.89| 38 | 6.7381.....1.2.3...4395761....7.8....7916584....2.37...64.3219...8.195......7....
4.9 | 36 | 1.2.3.4.5.73..58..485691..7..8.1.7..7...8...6..1...98.8..9.2..3.........3.71645.8
5.0 |
5.1 | 46 | ...1237..7..465.....3..76.4476.12.353.15.647225.734.61..76415.....258..7...379..6
5.2 | 58 | 4.5.67.8967..894.589.4.567.568942..77245..8969..678542157.94.68.498.675..8675.9.4
5.4 | 46 | 63214597881..9...4.4..8..1....85....16.274......96....481529.6.753416..9296738.4.
5.6 | 70 | 12345678945678912378913256423.9.58.66.52.893.8973612453625174985.86943.29..82365.
5.7 | 64 | 738421695692...418451...732314782569826...347975...8212479531861832..954569...273
5.8 | 60 | ...647981.1.2836577865913246423581795...29846..8.645328..4.2765.6.9.5218...8.6493
5.9 | 56 | 974...123612347589835..9674.6......8.4..9.2.5.2...1..7751964832293..8456486532791
6.0 | 55 | .54672.1.617.985.29..5...765.928..67...75.....7.....58463825791781934625295167384
6.1 | 60 | 528...341931524786476381592.19...85..64...17..53...62.195438267382976415647...938
6.2 | 64 | 259641738743985126681372..4896513247537264...412897...92473....37815.4.216542..7.
6.5 | 58 | ..4.5678969.7.8.4557849.6.245.9.78.68.9.64.57.6758.49114..795689.68.5.7478564.9.3
6.6 | 67 | 453219786628735491197846325379..2..8215.879.3864..32.7732..18.4981.74.32546328179
6.69| 55 | .7.6.3958.968.7.133.8....76.6749.8328..732.69932.8674.7.3...68442..68397689374.2.
6.7 | 64 | 12.689.7586.735..175.142...385274169942561738671398.5.438926517596417...217853...
6.8 | 62 | 6..1..38..3.5.8.1..183...9.8..613472421875936367924158146789523273451869.8.236741
6.9 | 65 | ..2.4.658....6.42346.25.971.4.532769926487135...619284685124397319876542274395816
7.0 | 63 | .134.7825..48.263128.1.3947....243183429187568.1.36294429671583.382451.91..3894.2
7.1 | 65 | 642319578187...439359...261914283657276...8935389..142721495386493...715865.3.924
7.2 | 65 | .6..92.84..4.16.35....54.96126935478759428361843167952...243617632571849417689523
7.3 | 61 | 371542986682...345459...217914376528768...13.523...76.135984672247...893896...451
7.4 | 35 | 57.3.1.6893.7.8.54....5....79.....45.........86.....326.7......42.6.7.8131.2.5.76
7.5 | 52 | ......217....5.8348..3..659..8...57127....946......382582941763746523198931786425
7.6 | 57 | .45.67.896.78.94.589.45.67.4..57.896.69..8547578946123.5479..6878.6.495.9.6.857.4
7.7 | 57 | 4.5.67.8967..894.589.4.567.568.94..77.45..8969..67854.15794..682498.675.38675.9.4
7.8 | 50 | .6.278.958.94356.757.691.8..9578..6.7.6..985..8.5.67.9.57964..89.8..75.66..85.97.
7.9 | 48 | ..8.62..5.2.85..6.6.57918.2..62.8.5185..16.2.3129.568.56.1.92.8.8.52..162.168.5..
8.2 | 42 | 6....2.5952..4..1...35..2.73..1945...1.658.3...5273..1..4..51...3..2..4575.4....8
8.3 | 58 | ....472969...8.45747.5.9831..4...789.9...8164....94523549876312638412975721935648
8.4 | 41 | 6....2.59592.4.81...35.92..3..1945...1.658.3...5273..1..4..51...3..2..4575.4...28
8.8 | 44 | ..9.52..3.2.93..5.5.367.9.2..52.9.3493..45.2.1427.359..5...72.9.9..2..652..5963..
8.9 | 41 | 6....245952..4..1..435..2..3..1945...1.658.344.5273..1..4..51...3..2..4575.4....8
9.0 | 49 | .62.78.958.93.56.757.69..8..95784.6.7.6..985..8.5.67.9.5796...89.8..75.66..85.97.
9.1 | 40 | 6....2.59592.4..1...35.92..3..1945...1.658.3...5273..1..4..51...3..2..4575.4...28
9.2 | 39 | 6....245952..4..1...35..2..3..1945...1.658.34..5273..1..4..51...3..2..4575.4....8
10.2| 36 | 64.1.2.353.....4.1.51..46..7.52.8..6.........4..7.91.8..46..51.5.6.....313.9.5.64
11.2| 37 | 6....2.5952..4..1...35..2..3..1945...1.658.3...5273..1..4..51...3..2..4575.4....8
Eioru

Posts: 182
Joined: 16 August 2006

Code: Select all
`9431257861586793427..3485198...31.9.3.1.92..859..861.3639817...215964837487253961ER=4.5, 64 clues Unique Rectangle type 3 (with Hidden Pair) (B3,C3,C4,B4)`
Eioru

Posts: 182
Joined: 16 August 2006

PreviousNext