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very hard VII

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Ajò Dimonios

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

Posted: Mon Aug 28, 2017 8:18 am Post subject: very hard VII

Hi everyone

Code:

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

Play this puzzle online at the Daily Sudoku site

Ciao a Tutti

Paolo

JC Van Hay

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

Posted: Mon Aug 28, 2017 9:33 am Post subject:

Code:

+-------------------+--------------------+------------------+
| 78(9) 2 5789 | 1589 3 1459 | 6 78 145 |
| 378 1 3578 | 58 2568 56(24) | 5(4) 278 9 |
| 6 4 58(9) | 7 1258 15(29) | 15 28 3 |
+-------------------+--------------------+------------------+
| 278 9 6 | 4 57 3 | 258 1 258 |
| 4 5 1 | 2 9 8 | 3 6 7 |
| 278 3 78 | 6 157 15 | 9 4 258 |
+-------------------+--------------------+------------------+
| 3-1(9) 8 349 | 139 (12) 7 | (124) 5 6 |
| 5 67 49 | 189 1268 169(2) | 12478 3 1248 |
| 13 67 2 | 1358 4 156 | 178 9 18 |
+-------------------+--------------------+------------------+
Kraken 2C6 :
1r7c5 2r7c5
1r7c7 2r7c5 4r7c7
4r2c7 4r2c6
2r8c6 2r2c6 2r3c6
9r3c6 9r3c3
9r3c1 9r7c1 -> 1r7c57==9r7c1 => -1r7c1; 9 singles

Code:

+--------------+-------------------+-------------------+
| 789 2 5789 | 89(15) 3 49 | 6 78 5-4(1) |
| 378 1 3578 | 8(5) 2568 246 | (45) 278 9 |
| 6 4 589 | 7 1258 29 | 15 28 3 |
+--------------+-------------------+-------------------+
| 27 9 6 | 4 57 3 | 8 1 25 |
| 4 5 1 | 2 9 8 | 3 6 7 |
| 278 3 78 | 6 57 1 | 9 4 25 |
+--------------+-------------------+-------------------+
| 39 8 349 | 19 12 7 | 124 5 6 |
| 5 7 49 | 189 1268 269 | 124 3 124 |
| 1 6 2 | 3 4 5 | 7 9 8 |
+--------------+-------------------+-------------------+
Wing :
1r1c9 1r1c4
5r1c4 5r2c4
5r2c7 4r2c7 -> 1r1c9==4r2c7 => -4r1c9; stte

Ajò Dimonios

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

Posted: Mon Aug 28, 2017 3:50 pm Post subject:

Hi everyone

Code:

+-------------+----------------+----------------+
| 789 2 5789 | 1589 3 1459 | 6 78 1458 |
| 378 1 3578 | 58 2568 2456 | 2458 278 9 |
| 6 4 589 | 7 1258 1259 | 1258 28 3 |
+-------------+----------------+----------------+
| 278 9 6 | 4 57 3 | 258 1 258 |
| 4 5 1 | 2 9 8 | 3 6 7 |
| 278 3 78 | 6 157 15 | 9 4 258 |
+-------------+----------------+----------------+
| 139 8 349 | 139 12 7 | 124 5 6 |
| 5 67 49 | 189 1268 1269 | 12478 3 1248 |
| 13 67 2 | 1358 4 156 | 178 9 18 |
+-------------+----------------+----------------+

Play this puzzle online at the Daily Sudoku site

R7C7=4=>singles to the error=>-4R7C7=>solution stte.

Ciao a Tutti
Paolo

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