## More Homework 5

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

### Re: More Homework 5

Ok then, here is a main diagonal symmetry puzzle.

For each cell, ricj=rjci:
Code: Select all
`+-------+-------+-------+| 1 . . | . . . | . . 2 || . 2 . | . 5 . | 3 . 4 || . . 3 | . . . | 8 9 . |+-------+-------+-------+| . . . | 1 . . | . . . || . 5 . | . 2 . | . 6 . || . . . | . . 3 | . . . |+-------+-------+-------+| . 3 8 | . . . | 1 . . || . . 9 | . 6 . | . 2 . || 2 4 . | . . . | . . 3 |+-------+-------+-------+  2 solutions`

JPF
JPF
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### Re: More Homework 5

Here are some more near misses for D, where the symmetry is such that off-diagonal values obey the rule r10-i:c10-j = 10-ricj
Code: Select all
` 1 . . . . . 3 9 5 . 2 . . 3 . 6 7 1 . . 3 . . . 8 4 2 . . . 1 . . . . . . 7 . . 2 . . 3 . . . . . . 3 . . . 8 6 2 . . . 1 . . 9 3 4 . 6 . . 2 . 5 1 7 . . . . . 3   4 solutions, but r5c8 /= 10-r8c5  1 . . . . . 8 9 6 . 2 . . 6 . 5 3 1 . . 3 . . . 2 7 4 . . . 1 . . . . . . 4 . . 2 . . 6 . . . . . . 3 . . . 6 3 8 . . . 1 . . 9 7 5 . 4 . . 2 . 4 1 2 . . . . . 3    8 solutions`

Mike

m_b_metcalf
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### Re: More Homework 5

D for Mike:

Here a valid and minimal puzzle, with "your" symmetry:
Code: Select all
`+-------+-------+-------+| 1 . . | . . . | . . 2 || . 2 . | . 6 . | . 3 5 || . . 3 | . . . | 8 . 4 |+-------+-------+-------+| . . . | 1 . . | . . . || . 4 . | . 2 . | . 6 . || . . . | . . 3 | . . . |+-------+-------+-------+| 6 . 2 | . . . | 1 . . || 5 7 . | . 4 . | . 2 . || 8 . . | . . . | . . 3 |+-------+-------+-------+`

JPF
JPF
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Location: Paris, France

### Re: More Homework 5

For the Patterns gamers,
Question E - Find the highest SE rating of a puzzle as defined here

In addition, as in the Patterns Game, the pattern must have a dihedral symmetry order between 2 to 8.

JPF
JPF
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Location: Paris, France

### Re: More Homework 5

E:
Code: Select all
` 1 . . . . . . . 2 . 2 . . 5 . . . 4 . . 3 . . . 6 7 8 . . . 1 . . . . . . 8 . . 2 . . 5 . . . . . . 3 . . . 6 9 2 . . . 1 . . 7 . . . 8 . . 2 . 4 . . . . . . . 3   ED=9.0/1.2/1.2`

m_b_metcalf
2017 Supporter

Posts: 13322
Joined: 15 May 2006
Location: Berlin

### Re: More Homework 5

E:
Code: Select all
`+-------+-------+-------+| 1 . . | . . . | 2 8 . || . 2 . | . 1 . | 6 . 4 || . . 3 | . . . | 5 . 1 |+-------+-------+-------+| . . . | 1 . . | . . . || . 7 . | . 2 . | . 4 . || . . . | . . 3 | . . . |+-------+-------+-------+| 7 . 6 | . . . | 1 . . || 3 . 5 | . 7 . | . 2 . || . 4 2 | . . . | . . 3 |   +-------+-------+-------+    ED=9.5/1.2/1.2`

JPF
JPF
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Posts: 6017
Joined: 06 December 2005
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