The New Sudoku Players' Forum

[urhegyi]

The first 4 puzzles I generated myself based on the fifth one I found on the internet which I took as an example.

Code: Select all

..43....1.5..1..2.8....65..1....48...9..3..6...37....25....32...7..4..1...92....6 ED=7.3/6.6/3.0
..48....1.3..2..4.5....19..8....62...7..9..5...61....33....48...1..3..6...95....2 ED=7.2/3.8/3.8
..53....1.4..8..2.9....56..5....61...7..5..3...41....62....47...5..9..6...35....2 ED=7.2/7.2/3.4
..74....3.2..1..9.4....95..5....67...4..8..3...83....13....19...6..5..2...47....6 ED=7.2/7.2/3.4
..42....6.6..7..3.2....61..1....46...5..9..1...71....99....37...8..4..5...37....8 ED=9.3/1.2/1.2

A picture of the first:



A few more:

Code: Select all

1....3..6..4.8.3.....7...2..2......7..3.6.4.......5..1....2.....8.1...5.9....4..3 ED=7.2/3.8/3.8
15...3..6..4.8.......7...2..2......7..3.6.4.......5..1....2.....8.1...5.9....4..3 ED=7.2/3.8/3.8
1....3..6..4.8.....5.7...2..2......7..3.6.4.......5..1....2.....8.1...5.9....4..3 ED=7.2/3.8/3.8
1....3..6..4.8.......7...2..2......7..3.6.4..6....5..1....2.....8.1...5.9....4..3 ED=7.2/3.8/3.8
1....37.6..4.8.......7...2..2......7..3.6.4.......5..1....2.....8.1...5.9....4..3 ED=6.7/3.8/3.8
1....3..6..4.8....8..7...2..2......7..3.6.4.......5..1....2.....8.1...5.9....4..3 ED=7.2/3.8/3.8

[jco]

For the first puzzle, I found a solution in two steps as follows.
After basics

Code: Select all

.--------------------------------------------------------------.
| 2679 Dv26    4    | 3     25789  25789 | 679    789    1     |
| 3679   5     7-6  | 489   1      789   | 34679  2      34789 |
| 8      13   C127  | 49   B279    6     | 5      3479   3479  |
|-------------------+--------------------+---------------------|
| 1    u(2)6 a(2)567| 569 A(2)569  4     | 8      3579   3579  |
| 247    9     2578 | 158   3      1258  | 147    6      457   |
| 46     48    3    | 7     5689   1589  | 149    459    2     |
|-------------------+--------------------+---------------------|
| 5      148  d168  | 1689  6789   3     | 2      4789   4789  |
|c236    7   db268  | 5689  4      589   | 39     1      3589  |
| 34     1348  9    | 2     578    1578  | 347    34578  6     |
'--------------------------------------------------------------'

1. Kraken Row (2)r4c235 => -6 r2c3 [followed by 3 placements and basics]
(2)r4c2 - (2=6)r1c2
(2)r4c3 - r8c3 = (2-6)r8c1 = r78c3
(2)r4c5 - r3c5 = r3c3 - (2=6)r1c2

In matrix form

Hidden Text: Show

perhaps could be improved? (still learning)

Code: Select all

(6)r78c3  (6)r8c1
          (2)r8c1 (2)r8c3
                          (2)r3c5 (2)r3c3
                  (2)r4c3 (2)r4c5         (2)r4c2
(6)r1c2                           (2)r1c2 (2)r1c2
-------------                                 
=> -6r2c3


Code: Select all

.-------------------------------------------------------.
| 269  26    4   | 3      257   257  |d679   8     1    |
| 369  5     7   | 489    1     89   | 3469  2     349  |
| 8   f13   f12  | 49    f27    6    | 5    e3479 e3479 |
|----------------+-------------------+------------------|
| 1    26    256 | 569    2569  4    | 8     37    37   |
| 7    9     258 | 158    3     1258 | 14    6     45   |
| 46   48    3   | 7      568   158  | 19    59    2    |
|----------------+-------------------+------------------|
| 5    148   168 | 1689 ia689+7 3    | 2    b479  b4789 |
| 236  7     268 | 5689   4     589  | 39    1     3589 |
| 34  g1348  9   | 2      578  h1578 |c347   3457  6    |
'-------------------------------------------------------'

2. (7)r7c5 = r7c89 - r9c7 = r1c7 - r3c89 = (721)r3c532 - r9c2 = (1-7)r9c6 = (7)r7c5 => +7 r7c5; ste