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Ajò Dimonios

Joined: 01 May 2017
Posts: 339
Location: Sassari Italy

Posted: Mon Jul 31, 2017 10:38 am Post subject: sett.sudoku28072017

Hi everyone

Code:

+-------+-------+-------+
| . 6 . | . . 2 | . . 8 |
| 7 3 . | . . . | . 9 . |
| . . 9 | 1 3 . | . . . |
+-------+-------+-------+
| . . 4 | . 1 . | . . 6 |
| . . 3 | 8 . 7 | 9 . . |
| 6 . . | . 5 . | 1 . . |
+-------+-------+-------+
| . . . | . 8 6 | 7 . . |
| . 8 . | . . . | . 2 3 |
| 5 . . | 3 . . | . 6 . |
+-------+-------+-------+

Play this puzzle online at the Daily Sudoku site

Can you find the solution with just one step after basics?

Ciao a Tutti
Paolo

JC Van Hay

Joined: 13 Jun 2010
Posts: 494
Location: Charleroi, Belgium

Posted: Mon Jul 31, 2017 1:28 pm Post subject:

The 2 solutions of the 8s -> 1 unique solution :

Code:

+---------------------+-------------------+----------------------+
| 14 6 1(5) | 79 79 2 | (345) 1345 8 |
| 7 3 12(58) | 6 4 58 | 25 9 125 |
| 248 24 9 | 1 3 58 | 6 457 2457 |
+---------------------+-------------------+----------------------+
| 2(89) 2579 4 | 29 1 39 | 25(3) -57(38) 6 |
| 12 125 3 | 8 6 7 | 9 45 245 |
| 6 279 27(8) | 29(4) 5 9(34) | 1 7(38) 27 |
+---------------------+-------------------+----------------------+
| 3 1249 12 | 459 8 6 | 7 145 1459 |
| (149) 8 6 | 579(4) 79 9(14) | 5(4) 2 3 |
| 5 1479 17 | 3 2 149 | 8 6 149 |
+---------------------+-------------------+----------------------+
8r4c8 8r6c8
3r6c8 3r6c6
4r6c6 4r6c4
8r6c3 8r4c1
9r4c1 9r8c1
1r8c1 1r8c6
4r8c4 4r8c1 4r8c6 4r8c7
8r6c3 8r2c3
5r2c3 5r1c3
4r1c7 5r1c7 3r1c7
3r4c8 3r6c8 3r4c7 -> [8r4c8==3r4c8] => -(57)r4c8; stte

or
Kraken 4R8 -> [8r4c8==HP(38)r46c8] => -(57)r4c8; stte
4r8c1-9r8c1=(9-8)r4c1=8r4c8
||
4r8c4-4r6c4=(4-3)r6c6=(3-8)r6c8=8r4c8
||
4r8c6-1r8c6=(1-9)r8c1=(9-8)r4c1=8r4c8
||
4r8c7-4r1c7=*[8r4c8=8r6c8-8r6c6=(8-5)r2c3=5r1c3-(5=*3)r1c7-3r4c7=HP(38)r46c8]

Ajò Dimonios

Joined: 01 May 2017
Posts: 339
Location: Sassari Italy

Posted: Fri Aug 04, 2017 2:24 pm Post subject:

Hi everyone

Code:

+---------------+-------------+---------------+
| 14 6 15 | 79 79 2 | 345 1345 8 |
| 7 3 1258 | 6 4 58 | 25 9 125 |
| 248 24 9 | 1 3 58 | 6 457 2457 |
+---------------+-------------+---------------+
| 289 2579 4 | 29 1 39 | 235 3578 6 |
| 12 125 3 | 8 6 7 | 9 45 245 |
| 6 279 278 | 249 5 349 | 1 378 27 |
+---------------+-------------+---------------+
| 3 1249 12 | 459 8 6 | 7 145 1459 |
| 149 8 6 | 4579 79 149 | 45 2 3 |
| 5 1479 17 | 3 2 149 | 8 6 149 |
+---------------+-------------+---------------+

Play this puzzle online at the Daily Sudoku site

My solution with one step after basic.

[ (8-5)R3C6=(5)R2C6-(5=2) R2C7-(2)R4C7;
(8)R3C6-(8)R3C1=NP(42)R3C12-(4=1)R1C1-(1=2)R5C1-(2)R5C9=NP(45)R5C89)-(5=3)R4C7;
(8)R3C6-(8)R2C6=(8-5)R2C3=(5)R1C3-(5)R1C7);
[(8)R3C6-(8)R3C1=(8-9)R4C1=(9-14)R8C1=(1-4)R8C6; and
(8)R3C6-(8)R3C1=(8)R4C1-(8)R4C8=(8-3)R6C8=(3-4)R6C6=(4)R6C4-(4)R8C4]=(4)R7C7-(4=3)R1C7]=>contradiction two singles 3 in column 7=>-8R3C6=>solution stte.

Ciao a Tutti
Paolo

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