at least 2 puzzles

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

at least 2 puzzles

Postby urhegyi » Wed Sep 27, 2023 9:54 am

I try to find more 20 clue sudokus with this layout and no singles for the first step but its hard(time consuming) and the range of ratings seems to be very limited.
Code: Select all
...8....3.7..4..9.2..6......1...9.7...3.....65.....8....8......4...2..5..9...3... ED=7.1/6.7/2.6
...1....5.8..7..2.3..4......6...2.7...5.....19.....4....1......7...9..6..9...5... ED=7.2/6.7/2.6
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Re: at least 2 puzzles

Postby m_b_metcalf » Wed Sep 27, 2023 10:57 am

Code: Select all
 . . . 1 . . . . 2
 . 3 . . 4 . . 5 .
 6 . . 7 . . . . .
 . 8 . . . 9 . 3 .
 . . 2 . . . . . 1
 4 . . . . . 7 . .
 . . 1 . . . . . .
 8 . . . 6 . . 4 .
 . 5 . . . 2 . . .   ED=9.0/6.7/3.4


Mike

[Edit} Also
Code: Select all
...1....2.3..4..5.6..7......8...5.3...2.....14.....7....1......5...3..4..9...2...     ED=7.8/6.7/2.6
...1....2.3..4..5.6..7......5...6.3...2.....14.....7....1......5...3..6..8...2...     ED=8.4/6.7/2.6
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Re: at least 2 puzzles

Postby JPF » Wed Sep 27, 2023 9:20 pm

Here is what I found:
Hidden Text: Show
Code: Select all
...1....2.3..4..5.6..7......8...3.4...7.....15.....2....1......8...5..3..4...6...   ED=9.2/6.7/2.6
...1....2.3..4..5.6..7......8...9.3...2.....14.....7....1......8...6..4..5...2...   ED=9.0/6.7/3.4
...1....2.3..4..5.6..7......5...3.8...2.....14.....9....1......5...9..6..8...2...   ED=9.0/6.7/2.6
...1....2.3..4..5.6..7......5...3.4...2.....17.....2....1......8...5..3..4...9...   ED=8.9/6.7/2.6
...1....2.3..4..5.5..6......7...8.3...2.....64.....1....6......1...3..4..8...7...   ED=8.9/6.7/2.6
...1....2.3..4..5.6..7......8...6.3...2.....79.....1....7......1...9..6..5...3...   ED=8.6/6.7/2.6
...1....2.3..4..5.6..7......8...6.4...2.....79.....1....7......1...9..6..5...3...   ED=8.6/6.7/2.6
...1....2.3..4..5.6..7......5...6.8...2.....19.....2....1......4...9..6..7...8...   ED=8.4/6.7/3.4
...1....2.3..2..4.5..6......4...3.7...6.....18.....2....1......7...5..3..9...4...   ED=8.4/6.7/2.6
...1....2.3..4..5.6..7......5...6.3...2.....14.....7....1......5...3..6..8...2...   ED=8.4/6.7/2.6
...1....2.3..4..5.6..7......5...8.3...2.....14.....7....1......5...3..6..8...2...   ED=8.4/6.7/2.6
...1....2.3..4..5.4..6......5...7.3...2.....68.....1....1......9...8..7..6...3...   ED=8.4/6.7/2.6
...1....2.3..4..5.6..7......8...5.3...2.....19.....4....1......5...9..6..6...2...   ED=8.3/6.7/2.6
...1....2.3..2..4.5..6......7...4.8...6.....19.....2....1......2...5..3..4...8...   ED=7.8/6.7/2.6
...1....2.3..4..5.6..7......8...5.3...2.....14.....7....1......5...3..4..9...2...   ED=7.8/6.7/2.6
...1....2.3..4..5.6..7......4...5.8...2.....71.....6....5......7...6..3..8...2...   ED=7.3/7.3/2.6
...1....2.3..4..5.6..7......5...2.4...1.....38.....7....2......9...3..6..4...5...   ED=7.2/7.2/2.6
...1....2.3..4..5.6..7......8...6.4...2.....13.....2....1......4...5..6..7...8...   ED=7.2/6.7/2.6
...1....2.3..4..5.6..7......4...6.3...2.....17.....2....1......8...5..6..5...4...   ED=7.2/6.7/2.6
...1....2.3..4..5.6..7......4...6.3...2.....17.....2....1......8...5..9..5...4...   ED=7.2/6.7/2.6
...1....2.3..4..5.6..7......8...6.3...2.....17.....2....1......4...5..6..5...9...   ED=7.2/6.7/2.6
...1....2.3..4..5.6..7......4...6.3...2.....17.....2....1......8...5..6..5...9...   ED=7.2/6.7/2.6
...1....2.3..4..5.6..7......8...6.3...2.....14.....2....1......9...5..6..5...8...   ED=7.2/6.7/2.6
...1....2.3..4..5.6..7......4...6.3...2.....17.....2....1......4...5..8..5...9...   ED=7.2/6.7/2.6
...1....2.3..4..5.6..7......8...5.4...2.....19.....7....1......4...9..8..9...2...   ED=7.2/6.7/2.6
...1....2.3..4..5.6..7......5...6.8...2.....49.....7....7......4...5..6..8...2...   ED=7.2/6.7/2.6
...1....2.3..4..5.6..7......8...5.6...2.....14.....7....1......9...6..8..4...2...   ED=7.2/6.7/2.6
...1....2.3..4..5.6..7......8...5.3...2.....79.....1....1......4...9..8..5...2...   ED=7.2/6.7/2.6
...1....2.3..4..5.6..7......8...5.3...2.....74.....1....1......9...6..8..5...2...   ED=7.2/6.7/2.6
...1....2.3..4..5.6..7......8...5.3...2.....69.....1....1......4...6..8..5...2...   ED=7.2/6.7/2.6
...1....2.3..4..5.6..7......7...5.3...2.....88.....1....8......1...9..7..5...2...   ED=7.1/7.1/2.6
...1....2.3..4..5.6..7......8...5.6...2.....14.....7....1......8...6..4..5...2...   ED=7.1/6.7/2.6
...1....2.3..4..5.6..7......8...5.6...2.....14.....7....1......8...6..4..9...2...   ED=7.1/6.7/2.6
...1....2.3..4..5.6..7......8...5.9...2.....19.....7....1......8...9..6..5...2...   ED=7.1/6.7/2.6
...1....2.3..4..5.6..7......8...5.6...2.....19.....7....1......8...6..9..4...2...   ED=7.1/6.7/2.6
...1....2.3..4..5.6..7......4...5.6...2.....18.....7....1......3...6..8..9...2...   ED=7.1/6.7/2.6
...1....2.3..4..5.6..7......8...5.6...2.....14.....7....1......8...6..9..4...2...   ED=7.1/6.7/2.6
...1....2.3..4..5.6..7......8...5.9...2.....14.....7....1......8...6..4..5...2...   ED=7.1/6.7/2.6
...1....2.3..4..5.6..7......8...5.4...2.....19.....7....1......8...9..6..4...2...   ED=7.1/6.7/2.6
...1....2.3..4..5.6..7......8...5.4...2.....14.....7....1......8...6..9..4...2...   ED=7.1/6.7/2.6
...1....2.3..4..5.6..7......7...5.8...2.....79.....1....1......8...9..6..5...2...   ED=7.1/6.7/2.6
...1....2.3..4..5.6..7......8...5.3...2.....79.....1....1......4...6..9..5...2...   ED=7.1/6.7/2.6
...1....2.3..4..5.6..7......8...5.3...2.....79.....1....1......8...6..9..5...2...   ED=7.1/6.7/2.6
...1....2.3..4..5.4..6......4...5.3...2.....67.....1....1......8...9..7..5...2...   ED=7.1/6.7/2.6
...1....2.3..4..5.6..7......8...5.3...2.....17.....4....1......8...6..7..9...2...   ED=7.1/6.7/2.6
...1....2.3..4..5.6..7......8...5.3...2.....49.....1....1......7...9..6..5...2...   ED=7.1/6.7/2.6
...1....2.3..4..5.6..7......8...5.3...2.....94.....1....1......8...9..6..5...2...   ED=7.1/6.7/2.6
...1....2.3..4..5.6..7......8...5.3...2.....89.....1....1......8...9..6..5...2...   ED=7.1/6.7/2.6
...1....2.3..4..5.6..7......4...5.3...2.....89.....1....5......1...8..7..7...2...   ED=6.7/3.4/2.6
...1....2.3..4..5.6..7......7...5.3...2.....89.....1....5......1...8..7..4...2...   ED=6.7/3.4/2.6
...1....2.3..4..5.4..6......6...5.3...2.....77.....1....5......1...8..6..7...2...   ED=6.6/3.4/2.6
...1....2.3..4..5.6..7......4...5.3...2.....88.....1....5......1...9..7..7...2...   ED=3.4/3.4/2.6
...1....2.3..4..5.6..7......7...5.3...2.....88.....1....5......1...9..7..4...2...   ED=3.4/3.4/2.6
...1....2.3..4..5.6..7......7...5.3...2.....88.....1....5......1...9..7..8...2...   ED=3.4/3.4/2.6


JPF
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Re: at least 2 puzzles

Postby 999_Springs » Fri Sep 29, 2023 1:38 am

will you two just admit that the patterns game is over and move on with your life :P :lol:
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Re: at least 2 puzzles

Postby urhegyi » Fri Sep 29, 2023 8:51 am

I hope that the game is not over and they keep answering problems I encounter by trying to generate nice paterns like this one with 20 clues:
Code: Select all
....869.....5...7...7.....4.6......25.......73......1.4.....6...5...3.....817....

I 'm wondering if it's possible to avoid singles at the first move, but after a night running my generator I still can't answering it.
Better equipped generators like those from m_b_metcalf and JPF may answering this question.
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Re: at least 2 puzzles

Postby JPF » Fri Sep 29, 2023 11:40 am

Here are some examples:
Hidden Text: Show
Code: Select all
....123.....4...5...6.....7.7......24.......89......6.3.....4...5...7.....186.... ED=9.2/9.2/6.7
....123.....4...5...6.....7.1......84.......92......6.5.....1...9...6.....328.... ED=9.1/9.1/6.7
....123.....4...5...6.....7.5......84.......97......1.1.....4...3...6.....298.... ED=9.1/9.1/6.7
....123.....4...5...6.....7.1......82.......64......9.7.....1...3...8.....596.... ED=9.0/9.0/6.7
....123.....4...5...6.....7.1......82.......64......9.7.....1...3...7.....985.... ED=9.1/9.1/6.7
....123.....4...5...6.....7.1......22.......68......4.3.....1...5...7.....496.... ED=8.9/8.9/6.7
....123.....4...5...6.....7.2......81.......68......9.3.....1...5...7.....496.... ED=8.9/8.9/6.7
....123.....4...5...6.....7.1......82.......49......6.3.....1...4...6.....539.... ED=8.9/8.9/6.7
....123.....4...5...6.....7.2......81.......24......6.9.....1...7...6.....534.... ED=8.8/8.8/6.7

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Re: at least 2 puzzles

Postby m_b_metcalf » Sat Sep 30, 2023 2:06 pm

This is not what you asked for, but here are 2 puzzles with rotational symmetry of the givens:
Code: Select all
  . . . . 1 2 3 . .
 . . . 7 . . . 6 .
 . . 8 . . . . . 9
 . 3 . . . . . . 4
 2 . . . . . . . 8
 6 . . . . . . 7 .
 1 . . . . . 2 . .
 . 4 . . . 3 . . .
 . . 7 8 9 . . . .   

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


Mike
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Re: at least 2 puzzles

Postby JPF » Sat Sep 30, 2023 4:37 pm

This one should do the trick:
Code: Select all
+-------+-------+-------+
| . . . | . 1 2 | 3 . . |
| . . . | 4 . . | . 5 . |
| . . 6 | . . . | . . 7 |
+-------+-------+-------+
| . 5 . | . . . | . . 8 |
| 1 . . | . . . | . . 6 |
| 4 . . | . . . | . 9 . |
+-------+-------+-------+
| 2 . . | . . . | 1 . . |
| . 9 . | . . 8 | . . . |
| . . 3 | 7 6 . | . . . |
+-------+-------+-------+   ED=4.0/4.0/2.6  - rotational symmetry of the givens

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