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Backup: Minimal 39 clues puzzles
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eleven

Joined: 14 Apr 2010
Posts: 7
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PostPosted: Sun Apr 18, 2010 4:34 pm    Post subject: Backup: Minimal 39 clues puzzles Reply with quote

Pat has asked me to publish the current state here. In the moment i dont spend any (but cpu) time for sudoku, beside of posting my anger, that the players forum was turned off.

I have planned to write a summary of this search in some weeks - here or (hopefully) in the reestablished players forum.
Code:
                                                                                   SER  av.weight
12345.67.46.72......76.34..21.3..8..3..28514..........63..7....7.28.6.1..4153.76.  7.8    6.08
12345.67.57.1.64....6.37.5.73.6.2...6.1.7..2.2..31.76.81...354.3..5.128..........  8.5    9.28
12345.67.57.1.64....6.37.5.73.6.2...6.1.7..2....31.76.812..354.3..5.128..........  8.3   10.33
12345.67.46.2..5..5.71...4.37654.82.8.5....64.4..8.7.573.81...66..3...87.........  7.8    7.15
12345.6..46.7.152...56..4..21786.3...3.1..862.........34.....5.7.154.23..52...7.4  7.6    6.13
12345.6..56.7.142...46..5..21786.3...3.1..862.........35.....4.7.154.23..42...7.5  7.6    5.95
12345.67.46.72....7.56.34..2513...4.3...42.5..........5.283.76.8.72.65...3..7..8.  8.3    6.74
12345.67.47....1.5..57...3424.58..615.16.2....3..4.5..71.26...33.287..16.........  9.0    5.72
12345.67.45.6..2.1..6....5.24..3.18.3.1.4..27.........51....86.83.56.7126.2.8...5  7.7   13.05
12345.67.45.7..2.1..7....5.24..3.81.3.1.4..26.........51....78.83.57.1627.2.8...5  7.7   12.15
12345.6..67.1...5...5..63..21.84.73..37.1248..........78..6154..51..486..6.58....  9.0    8.13
12345.6..47.26.153.......4.24.3.658..5..4.3.1.8.5...6471.62.83.8.........32.8..1.  8.4    6.85
12345.6..47.26.153.......4.24.3.658..5..4.3.1.8.5...6473.62.81.8.........12.8..3.  8.4    6.90
12345.67.45.6.......6.3...423..7.18..1538.7.2.........58.76.4.1.6184..27.4....86.  8.3    6.33
12345.6..67.1..5....5..6.3.23.81.74..17.4238..........78..6145..51..486..6.58....  8.9    6.51
12345....46.27.513......4..38.7..2.16...2.38..128.....84.5...3.5.6.8.1.4.3164.8..  8.4    9.41
12345.67.47.26.5.3.........28.1...353...2.78...78..1..81.6.235.7...8...1.32.1.84.  8.4    5.41
12345.67.47.26.5.3.........28.1...353.1.2.78...78..1..7...8...18..6.235..32.1.84.  8.4    5.31
12345.67.47.6..52.5..7..4.334..8..6.68.14.23..12...8.483...67.22..87.3...........  6.6    6.87
12345.67.47....52.5..7..4.334..8..6.68.14.23..12.6.8.483...67.22..87.3...........  6.6    7.28
12345.67.47....52.5..7..4.325.87.3..83...67.2.........34.18.26.68..4..3..12.6...4  7.7    6.03
12345.67.47.26.5.3.........58..1..3.3.15.278..47.8.1..7..8...618..62.3.7.3.1..8..  8.4    5.82
12345.67.47....52.5..7..4.338.14.26.64..8..3..12.6.8.483...67.22..87.3...........  6.6    7.54
12345.67.47.6..52.5..7..4.338.14.26.64..8..3..12...8.483...67.22..87.3...........  6.6    7.13
12345.67.47.36.5.2.........38.1...252...3.78...78..1..81.6.325.7...8...1.32.1.84.  8.4    5.49
12345.67.47.36.5.2.........38.1...252.1.3.78...78..1..7...8...18..6.325..32.1.84.  8.4    5.38
12345.6..46.2.7.....5.364..517.8.24.34.72518..........63.572.1.7...6.....513...6.  7.7    5.77
12345.6..46.2.7.....5.364..517.8324.34.72.18..........63.572.1.7...6.....513...6.  7.7    5.72
12345.6..46.2.7.....5.364..317.8524.54.72.18..........63.572.1.7...6.....513...6.  7.7    5.69
12345.6..46.2.7.....5.364..317.8.24.54.72318..........63.572.1.7...6.....513...6.  7.7    5.67
12345.6..46.2.7.....5.364..317.8.24.54.72318..........65.372.1.7...6.....315...6.  7.7    5.82   
12345.6..46.2.7.....5.364..317.8524.54.72.18..........65.372.1.7...6.....315...6.  7.7    5.67
12345.6..46.2.7.....5.364..517.8.24.34.72518..........65.372.1.7...6.....315...6.  7.7    5.62
12345.6..46.2.7.....5.364..517.8324.34.72.18..........65.372.1.7...6.....315...6.  7.7    5.74
12345.67.4..16.5.2.......4.23..1.86.61.83..25..86.....3.154.28.8.2..145..4..8....  8.4    8.82
12345.6..74.2.65136..7..4..38.6.....46.....31.12.4.8.687.1.23.5.3.57.1.8.........  7.3    5.38
12345.67.45.6.712...7...5..21...436..34.6.81..........54...378.3.27.6.5..7154....  8.9    6.36
12345.67.46...2...5.761.4..21.58.7..7..2.1....35.4....37216..846..82.3.7.......6.  8.4    5.46
12345.67.47.6.21356.....4..2......178.....3...371.....38254.76.74...6583.6.....4.  7.3    4.59
12345.67.47.6.21356.....4..2.7....1.8.....3...3.1....738254.76.74...6583.6.....4.  7.3    3.97
12345.67.47.6.21356.....4..38254.76.74...6583.6.....4.81....3..2.......7.371.....  7.3    5.13
12345.67.4.........7.62.3.438.2.....2.158.73...7.1.8..6.4..2.8..1286.4.3.3.14..6.  8.8    8.67
12345.67.4.........7.62.4.338.2.....2.158.73...7.1.8..6.4..2.8..1286.3.4.3.14..6.  8.8    8.51
12345.67.47...62..5.67...3434...5.6.6.21..3.....6...4283.5.172.2.58.7.13.........  8.9    5.95
12345.6..47.6..1..6.5...43.3.756.28..5..8.36..........54..1.72.7.12.584..32.4..1.  8.9    5.41
12345.6..56.7.........6352.23..4781.8.........1.83.24.68.3.415.3.158..6..5...6.8.  9.0   11.41
12345.6..47.6..1..6.5...43.3.758.26..5..6.38..........54..1.72.7.12.584..32.4..1.  8.9    5.05
12345.67.4..6......6..7243.21.58.36.38.26.1....6....8.84........3172.84...284..1.  8.3   14.49
1234..5..46.17.38...8......6.132.7...37.1426..4...7.3..1624.85..84.5162....8.....  7.8    7.00
12345.67.4..6......6..7243.21.58.36.38.26.1....6....8.84........3274.81...182..4.  8.3   15.46
12345.67.45....1....73...5424..3.78.7.184.32..382...41.1.52.867.7.6...1..........  7.9   10.03
12345.67.56.2..4..4.7.365..25.783.4.3.4..285....54....8..32.76..3.8.......2.6..8.  7.8    9.41
12345.67.46.7.....8.5.364.135..8.71..1.5738...........64.3.51..5...67..4.3.84..6.  7.8    9.10
12345.67.47.........671.3.463.82.1..8..1....6.1.....3.74.28..633.8.7.4.2.6..4.78.  8.3    9.36
12.34.56.35.16.27..........48.5.36...35.1684...148..5.87.6.1.....387..26....3.78.  9.0    6.03
12.34.56.34.6.5..7....284.351.48.7.64.........8..6.1.485.2.63.12..83.6.5.3..5....  8.9   15.15
12345.6..67.2...5...5..63..21.84.73..37.2148..........78..6254..52..486..6.58....  9.0    8.46
12.34.56.35.16.27..........48.5.16...15.3684...348..5.87.6.3.....187..26....1.78.  9.0    5.85
12345.6..47.62.153.......4.24.3.658..5..4.3.1.8.5...6471.26.83.8.........32.8..1.  8.5    6.69
12345.67.46.7..2.55.7....3.23158.4....514..23.........7.281.3.63..6..7....6.7..42  8.5    4.44
12345.67.46....2.55.76...3431284.....4.51.3.2.........63.18..272..7...6..7..6.5.3  8.5    4.03
12345.67.46....2..5.76...3431284..5..4.51.3.2.........63.18..272..7...6..7..6.5.3  8.5    4.08
12345.6..6..7.1.25.....64..56.8.....3.85..2.6.12.675.883.14.7.22.1.738.4.........  8.9    4.95
12345.67.45.7.61....7.3..5.23.6.481.8.........1438..6.3....75..5..8637.1...54..8.  8.8    6.28
12345.67.46.72.5.1.......4.3.65...8..1.83.765.8....1..84....3..6.2.8.41..3124.8..  8.3    5.26
12345.6..4..62.31.........431.76.4.87.48...63....4.17.83..7....2.158.73...72..8.1  9.0    5.97
12345.67.57.1.64....6.37.5.231...74.7..34182..........65..1328.3.....5...125...6.  9.0    8.95
12345.67.57.1.64....6.37.5.231...74.7..34128..........65..1382.3.....5...125...6.  9.0    8.82
12345.67.57.62.41...47..5..2...4.861.1.8...5..........78.....3.3.128.74..4237.18.  7.8    5.87
12345.67.4..3.651..5.......38.6.27..5...4382..12.8..4.8..2......3..6418...183.26.  8.0    5.44
12345.67.4..3.651..5.......23..6418.8..2.......183.26.38.6.27..5...4382..1..8..4.  8.0    5.49
12345.6..57.6.21....6.3..5.3571.684..6.........134.76.7..5.342..32.1457....2.....  8.4    5.36
12345.67.4..3.651..5.......38.6.2.5.5...432...1258..4.83..6412...123.86....8.....  8.4    5.44
12345.67.54.7..2..8.7.3..5.3..5.486...46.351..........41.36.78.7.8.4..2..3.8.71..  8.4    4.79
12345.67.48.6..2..6.7.3..4.2..58..67.7.16..52.........84.3..7..7.184.52...2.1..84  8.4    4.92
12345.67.46...7..27....634.21.7.583..3..8.72..........3526.148.6..54.2.3.4.....6.  7.8    6.44
12345.67.46.7.15....5...4..21.3768.58.651.7.2.........64..3....3.16.72.4...14.3..  8.2    5.67
12345.67.46.7.25....5...4..21.3768.5.8652.7.1.........64..3.....326.71.4...24.3..  8.2    5.72


Last edited by eleven on Fri Apr 23, 2010 1:03 pm; edited 1 time in total
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dobrichev

Joined: 18 Dec 2009
Posts: 28
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PostPosted: Tue Apr 20, 2010 1:13 am    Post subject: Reply with quote

Congratulations!

I see there are 10 more 39s for the last few weeks. It seems that your CPUs are working in the right direction.
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m_b_metcalf

Joined: 13 Mar 2006
Posts: 210
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PostPosted: Tue Apr 20, 2010 5:15 am    Post subject: Re: Backup: Minimal 39 clues puzzles Reply with quote

eleven wrote:
Pat has asked me to publish the current state here. In the moment i dont spend any (but cpu) time for sudoku, beside of posting my anger, that the players forum was turned off.

I have planned to write a summary of this search in some weeks - here or (hopefully) in the reestablished players forum.
Code:
 
12345.6..4..62.31.........431.76.4.87.48...63....4.17.83..7....2.158.73...72..8.1  9.0    5.97

Interesting. I suppose it's well known that these puzzles all have only 8 values among the givens (but how can I tell by searching Question Crying or Very sad ). Number 66 (above) is getting close to being a diamond: 9.0/9.0/8.1.

Regards,

Mike Metcalf
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ChPicard

Joined: 12 Mar 2008
Posts: 82
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PostPosted: Tue Apr 20, 2010 9:28 am    Post subject: How to verify it is minimal quickly? Reply with quote

Hi

How to verify quickly that it is minimal ?

Thank you
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m_b_metcalf

Joined: 13 Mar 2006
Posts: 210
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PostPosted: Tue Apr 20, 2010 12:11 pm    Post subject: Re: How to verify it is minimal quickly? Reply with quote

ChPicard wrote:
How to verify quickly that it is minimal ?

You need a solver that is set to find all solutions to a candidate puzzle, but to stop at the second. You then present the puzzle to the solver as many times as there are clues, each time with a different clue missing. The puzzle is minimal if the solver finds two solutions each time. (The test can be stopped whenever only one solution is found as then the puzzle is clearly not minimal.)

A faster but more complicated method is to introduce an intermediate step in which, after finding a first solution, it is inspected to identify as many unavoidable sets as possible (say, all 4- and 6-sets) and, as each set is identified, to check that it is covered by at least one clue. If any set is uncovered the puzzle without that clue has multiple solutions.

Regards,

Mike Metcalf
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ronk

Joined: 15 Apr 2010
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PostPosted: Tue Apr 20, 2010 12:54 pm    Post subject: Re: How to verify it is minimal quickly? Reply with quote

ChPicard wrote:

How to verify quickly that it is minimal ?

If you're looking for a tool rather than an algorithm, gsf's command line solver works well. See downloads at the bottom of this page and use the command line ... [revised to add link]

sudoku -m file.dat

... where file.dat contains the puzzles to be minimalized. The output includes the clue counts, e.g. "C39".


Last edited by ronk on Tue Apr 20, 2010 1:54 pm; edited 1 time in total
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champagne

Joined: 14 Apr 2010
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PostPosted: Tue Apr 20, 2010 1:29 pm    Post subject: Re: How to verify it is minimal quickly? Reply with quote

ChPicard wrote:
Hi

How to verify quickly that it is minimal ?

Thank you


I apply the first rule given by mike, but on top of it, at generation time, you can stop immediately if in the process one of the clues is inferred by the others.

champagne
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daj95376

Joined: 05 Feb 2006
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PostPosted: Tue Apr 20, 2010 4:58 pm    Post subject: Re: How to verify it is minimal quickly? Reply with quote

ronk wrote:
If you're looking for a tool rather than an algorithm, gsf's command line solver works well. See downloads at the bottom of this page and use the command line ... [revised to add link]

sudoku -m file.dat

... where file.dat contains the puzzles to be minimalized. The output includes the clue counts, e.g. "C39".

Something I've always wondered but never took the time to check. Maybe you have the answer handy.

Does gsf's solver find minimal puzzles for the solution, or does it find the minimal combination of clues from those supplied for the puzzle?

I'm interested in the second case because I post puzzles elsewhere that must meet certain difficulty constraints. Sometimes more clues can be removed from my puzzle, but it changes the difficulty level or ruins the symmetry of the clues. Still, I'd like an easy way to know if my clues are even close to minimal.

TIA and Regards, Danny
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wapati

Joined: 12 Jun 2007
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PostPosted: Tue Apr 20, 2010 5:30 pm    Post subject: Reply with quote

Ruud's SudoCue can optimize.

You have some choices, such as to require symmetry preservation.
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ronk

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PostPosted: Tue Apr 20, 2010 5:43 pm    Post subject: Re: How to verify it is minimal quickly? Reply with quote

daj95376 wrote:
Does gsf's solver find minimal puzzles for the solution, or does it find the minimal combination of clues from those supplied for the puzzle?

The latter. I think there's a way to specify "symmetrically minimal" puzzles too, but I've lost the formula for that.
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daj95376

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PostPosted: Tue Apr 20, 2010 8:22 pm    Post subject: Reply with quote

Thanks wapati and ronk for the information. I'll give both solvers a try.
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Pat

Joined: 06 Sep 2006
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PostPosted: Wed Apr 21, 2010 10:26 am    Post subject: re: 39-clue minimal puzzles -- eleven's 75 Reply with quote

eleven wrote:


    12345.67.46.72......76.34..21.3..8..3..28514..........63..7....7.28.6.1..4153.76.
    12345.67.57.1.64....6.37.5.73.6.2...6.1.7..2.2..31.76.81...354.3..5.128..........
    12345.67.57.1.64....6.37.5.73.6.2...6.1.7..2....31.76.812..354.3..5.128..........
    12345.67.46.2..5..5.71...4.37654.82.8.5....64.4..8.7.573.81...66..3...87.........
    12345.6..46.7.152...56..4..21786.3...3.1..862.........34.....5.7.154.23..52...7.4
    12345.6..56.7.142...46..5..21786.3...3.1..862.........35.....4.7.154.23..42...7.5
    12345.67.46.72....7.56.34..2513...4.3...42.5..........5.283.76.8.72.65...3..7..8.
    12345.67.47....1.5..57...3424.58..615.16.2....3..4.5..71.26...33.287..16.........
    12345.67.45.6..2.1..6....5.24..3.18.3.1.4..27.........51....86.83.56.7126.2.8...5
    12345.67.45.7..2.1..7....5.24..3.81.3.1.4..26.........51....78.83.57.1627.2.8...5
    12345.6..67.1...5...5..63..21.84.73..37.1248..........78..6154..51..486..6.58....
    12345.6..47.26.153.......4.24.3.658..5..4.3.1.8.5...6471.62.83.8.........32.8..1.
    12345.6..47.26.153.......4.24.3.658..5..4.3.1.8.5...6473.62.81.8.........12.8..3.
    12345.67.45.6.......6.3...423..7.18..1538.7.2.........58.76.4.1.6184..27.4....86.
    12345.6..67.1..5....5..6.3.23.81.74..17.4238..........78..6145..51..486..6.58....
    12345....46.27.513......4..38.7..2.16...2.38..128.....84.5...3.5.6.8.1.4.3164.8..
    12345.67.47.26.5.3.........28.1...353...2.78...78..1..81.6.235.7...8...1.32.1.84.
    12345.67.47.26.5.3.........28.1...353.1.2.78...78..1..7...8...18..6.235..32.1.84.
    12345.67.47.6..52.5..7..4.334..8..6.68.14.23..12...8.483...67.22..87.3...........
    12345.67.47....52.5..7..4.334..8..6.68.14.23..12.6.8.483...67.22..87.3...........
    12345.67.47....52.5..7..4.325.87.3..83...67.2.........34.18.26.68..4..3..12.6...4
    12345.67.47.26.5.3.........58..1..3.3.15.278..47.8.1..7..8...618..62.3.7.3.1..8..
    12345.67.47....52.5..7..4.338.14.26.64..8..3..12.6.8.483...67.22..87.3...........
    12345.67.47.6..52.5..7..4.338.14.26.64..8..3..12...8.483...67.22..87.3...........
    12345.67.47.36.5.2.........38.1...252...3.78...78..1..81.6.325.7...8...1.32.1.84.
    12345.67.47.36.5.2.........38.1...252.1.3.78...78..1..7...8...18..6.325..32.1.84.
    12345.6..46.2.7.....5.364..517.8.24.34.72518..........63.572.1.7...6.....513...6.
    12345.6..46.2.7.....5.364..517.8324.34.72.18..........63.572.1.7...6.....513...6.
    12345.6..46.2.7.....5.364..317.8524.54.72.18..........63.572.1.7...6.....513...6.
    12345.6..46.2.7.....5.364..317.8.24.54.72318..........63.572.1.7...6.....513...6.
    12345.6..46.2.7.....5.364..317.8.24.54.72318..........65.372.1.7...6.....315...6.
    12345.6..46.2.7.....5.364..317.8524.54.72.18..........65.372.1.7...6.....315...6.
    12345.6..46.2.7.....5.364..517.8.24.34.72518..........65.372.1.7...6.....315...6.
    12345.6..46.2.7.....5.364..517.8324.34.72.18..........65.372.1.7...6.....315...6.
    12345.67.4..16.5.2.......4.23..1.86.61.83..25..86.....3.154.28.8.2..145..4..8....
    12345.6..74.2.65136..7..4..38.6.....46.....31.12.4.8.687.1.23.5.3.57.1.8.........
    12345.67.45.6.712...7...5..21...436..34.6.81..........54...378.3.27.6.5..7154....
    12345.67.46...2...5.761.4..21.58.7..7..2.1....35.4....37216..846..82.3.7.......6.
    12345.67.47.6.21356.....4..2......178.....3...371.....38254.76.74...6583.6.....4.
    12345.67.47.6.21356.....4..2.7....1.8.....3...3.1....738254.76.74...6583.6.....4.
    12345.67.47.6.21356.....4..38254.76.74...6583.6.....4.81....3..2.......7.371.....
    12345.67.4.........7.62.3.438.2.....2.158.73...7.1.8..6.4..2.8..1286.4.3.3.14..6.
    12345.67.4.........7.62.4.338.2.....2.158.73...7.1.8..6.4..2.8..1286.3.4.3.14..6.
    12345.67.47...62..5.67...3434...5.6.6.21..3.....6...4283.5.172.2.58.7.13.........
    12345.6..47.6..1..6.5...43.3.756.28..5..8.36..........54..1.72.7.12.584..32.4..1.
    12345.6..56.7.........6352.23..4781.8.........1.83.24.68.3.415.3.158..6..5...6.8.
    12345.6..47.6..1..6.5...43.3.758.26..5..6.38..........54..1.72.7.12.584..32.4..1.
    12345.67.4..6......6..7243.21.58.36.38.26.1....6....8.84........3172.84...284..1.
    1234..5..46.17.38...8......6.132.7...37.1426..4...7.3..1624.85..84.5162....8.....
    12345.67.4..6......6..7243.21.58.36.38.26.1....6....8.84........3274.81...182..4.
    12345.67.45....1....73...5424..3.78.7.184.32..382...41.1.52.867.7.6...1..........
    12345.67.56.2..4..4.7.365..25.783.4.3.4..285....54....8..32.76..3.8.......2.6..8.
    12345.67.46.7.....8.5.364.135..8.71..1.5738...........64.3.51..5...67..4.3.84..6.
    12345.67.47.........671.3.463.82.1..8..1....6.1.....3.74.28..633.8.7.4.2.6..4.78.
    12.34.56.35.16.27..........48.5.36...35.1684...148..5.87.6.1.....387..26....3.78.
    12.34.56.34.6.5..7....284.351.48.7.64.........8..6.1.485.2.63.12..83.6.5.3..5....
    12345.6..67.2...5...5..63..21.84.73..37.2148..........78..6254..52..486..6.58....
    12.34.56.35.16.27..........48.5.16...15.3684...348..5.87.6.3.....187..26....1.78.
    12345.6..47.62.153.......4.24.3.658..5..4.3.1.8.5...6471.26.83.8.........32.8..1.
    12345.67.46.7..2.55.7....3.23158.4....514..23.........7.281.3.63..6..7....6.7..42
    12345.67.46....2.55.76...3431284.....4.51.3.2.........63.18..272..7...6..7..6.5.3
    12345.67.46....2..5.76...3431284..5..4.51.3.2.........63.18..272..7...6..7..6.5.3
    12345.6..6..7.1.25.....64..56.8.....3.85..2.6.12.675.883.14.7.22.1.738.4.........
    12345.67.45.7.61....7.3..5.23.6.481.8.........1438..6.3....75..5..8637.1...54..8.
    12345.67.46.72.5.1.......4.3.65...8..1.83.765.8....1..84....3..6.2.8.41..3124.8..
    12345.6..4..62.31.........431.76.4.87.48...63....4.17.83..7....2.158.73...72..8.1
    12345.67.57.1.64....6.37.5.231...74.7..34182..........65..1328.3.....5...125...6.
    12345.67.57.1.64....6.37.5.231...74.7..34128..........65..1382.3.....5...125...6.
    12345.67.57.62.41...47..5..2...4.861.1.8...5..........78.....3.3.128.74..4237.18.
    12345.67.4..3.651..5.......38.6.27..5...4382..12.8..4.8..2......3..6418...183.26.
    12345.67.4..3.651..5.......23..6418.8..2.......183.26.38.6.27..5...4382..1..8..4.
    12345.6..57.6.21....6.3..5.3571.684..6.........134.76.7..5.342..32.1457....2.....
    12345.67.4..3.651..5.......38.6.2.5.5...432...1258..4.83..6412...123.86....8.....
    12345.67.54.7..2..8.7.3..5.3..5.486...46.351..........41.36.78.7.8.4..2..3.8.71..
    12345.67.48.6..2..6.7.3..4.2..58..67.7.16..52.........84.3..7..7.184.52...2.1..84

hey eleven,

thanks for the 75 39-clue puzzles
    i was hoping you'd also provide
    updated collections of 38s and 37s
~ Pat [ PatAndOnlyPat.Multiply.com ]
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eleven

Joined: 14 Apr 2010
Posts: 7
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PostPosted: Wed Apr 21, 2010 6:22 pm    Post subject: Reply with quote

Ah, thanks to all, i did not expect replies.
My company disallows this site - i dont know why (bb?). So i cant see it each day.

Pat, nice to see your page. I can upload the puzzles at the weekend.
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eleven

Joined: 14 Apr 2010
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PostPosted: Fri Apr 23, 2010 1:21 pm    Post subject: Reply with quote

Now i have uploaded my sets of minimal 37's and 38's to these links. Please dont mind the banners, the button for the download is at the bottom of the page. Note, that the links will die a month after the last download.
sudoku37.zip
sudoku38.zip

Three 39's were added in the first post (that does not mean that i find them that fast, they just come eratically).

Indeed all known 39's have a missing digit (though my method would not exclude others).
Also most of them have an empty row/column (84.8 % - 67 out of 79 - all i have found including an isomorph of one of Havards 39's), 31 (39.2%) have both an empty row and column.

For the 38's:
1.5 % have all 9 digits given, 74.5% an empty row/column, 28.4% both an empty row and column.
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Pat

Joined: 06 Sep 2006
Posts: 128
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PostPosted: Tue Apr 27, 2010 6:24 am    Post subject: Reply with quote

eleven wrote:

    Now i have uploaded my sets of minimal 37s and 38s to these links.

    Please dont mind the banners,
    the button for the download is at the bottom of the page.

    Note, that the links will die a month after the last download.
    thanks

    i downloaded both files (Apr.25)

    also, posted the 38s ( as before ) on my Multiply

    they seem quite happy to host files
      max 5 attachments per post,
      max 20 MB each file --
      so the file of 37s is too large
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