Pencilmark only Sudoku

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338 clues

Postby dobrichev » Wed Oct 23, 2019 4:59 pm

One minimal puzzle with 338 restrictions, closer to the high-end.
Code: Select all
12..5..8..23.567..1.3.5.789..345.789...4567..1..456.8912.45.7.91..4.6789.23..6..91.34.6..9..3.56..9.2345.7.912...6..91.....78..234...891.3456....2.4.6..91...56789.2.45678...34...89.2...67.9.23..678.12.45....1..4..7.91.34...891.3.5.7..1234.67..123..6.8...34.678.1234.67.91.3.56...1.34...8912..567..123..678912.4...891.3.5.7891...567.91234...8.1..45..891..4...89.2.4.6.891234..7.91...56.8...3..6..912..567...2.45678912......9..3.56.8......67891.3456.8..23.5....12.45.78912345....1..4.67.9..34.6..912..5..89.2..56.89.23.5....1....6..91..45.7..12345...9..3..678.12.45.7.91...5.7..12...67.91234...8..2.4....9123..67...2..5..89.23.56...123.567891234.6..912....7.9..34.6....23.5.7.9....567..12....7891.3.56.8..234.67.91...56789..345.78.

Taking into account that the absolute maximum of the restrictions is 648 - for fully resolved grid - this is more than the half. Equivalent of 42 1/4 vanilla clues.
The lower limit for known puzzles is 92 restrictions. Equivalent of 11 1/2 vanilla clues.
dobrichev
2016 Supporter
 
Posts: 1777
Joined: 24 May 2010

Re: Pencilmark only Sudoku

Postby tarek » Mon Nov 18, 2019 9:23 am

A sukaku with an interesting fish
Code: Select all
+-------------------------------+-------------------------------+-------------------------------+
| 145679    12349    *1234689   | 1346-8    134679-8  123457-8  |*23456789  123469    4-8       |
| 1347      1357      123459    | 23468     1235789   1278      | 23456     3459      123456789 |
|*1246789   12579     23479     | 12345678  126789    2345678   | 234567    2345679   12346789  |
+-------------------------------+-------------------------------+-------------------------------+
|*1245689   246       124567    | 1245689   245678    24567     | 1234569   2469      12345678  |
|*38        1345679   13456     | 12345789  137       12578     | 4567      145679    124678    |
| 234567   *1345689  *123456789 |12345679-8 12456-8   12459-8   |*1246789   456       124567-8  |
+-------------------------------+-------------------------------+-------------------------------+
| 1234679-8  123456789 13578    | 12456789  138       245679    | 1569      235689    249       |
| 1234679-8  123579    345789   | 2346789   1235678   2346789   | 145679    13579     23467     |
| 235679-8   145679    12367    | 1235678   1346      123456789 | 234579    12345789  1245      |
+-------------------------------+-------------------------------+-------------------------------+
Mutant Swordfish 8c7b14\r16c1 r16c4569, r789c1 <>8

Original Puzzle: Show
Code: Select all
1..4567891234....91234.6.891.34.6.8.1.34.678912345.78..234567891234.6..9...4...8.1.34..7..1.3.5.7..12345...9.234.6.8.123.5.78912....78..23456.....345...912345678912.4.678912..5.7.9.234..7.912345678.12...6789.2345678..234567...234567.91234.678912.456.89.2.4.6...12.4567..12.456.89.2.456789.2.4567..123456..9.2.4.6..912345678...3....8.1.34567.91.3456...12345.7891.3...7.912..5.78...34567..1.34567.91234.678..2345678.1.3456.8912345678912345678912.456.8912.45..891234.6789..3456...12345678.1234.67891234567891.3.5.78.12.4567891.3....89.2.4567.91...56.89.23.56.89.2.4...891234.6789123.5.7.9..345.789.234.6789123.56789.234.67891..4567891.3.5.7.9.234.678..23.567891..4567.9123..67..123.5678.1.34.6..9123456789.2345.78912345.78912.45..8.
+-------------------------------+-------------------------------+-------------------------------+
| 1456789   12349     1234689   | 13468     1346789   1234578   | 23456789  123469    48        |
| 1347      1357      123459    | 23468     1235789   1278      | 23456     3459      123456789 |
| 1246789   12579     23479     | 12345678  126789    2345678   | 234567    2345679   12346789  |
+-------------------------------+-------------------------------+-------------------------------+
| 1245689   246       124567    | 1245689   2456789   24567     | 1234569   2469      12345678  |
| 38        1345679   13456     | 12345789  1379      12578     | 34567     1345679   1234678   |
| 2345678   1345689   123456789 | 123456789 1245689   124589    | 12346789  3456      12345678  |
+-------------------------------+-------------------------------+-------------------------------+
| 12346789  123456789 13578     | 12456789  1389      245679    | 15689     235689    2489      |
| 12346789  123579    345789    | 2346789   12356789  2346789   | 1456789   13579     234678    |
| 2356789   145679    12367     | 1235678   13469     123456789 | 2345789   12345789  12458     |
+-------------------------------+-------------------------------+-------------------------------+
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tarek
 
Posts: 3362
Joined: 05 January 2006

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