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Unfair 041520

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immpy

Joined: 06 May 2017
Posts: 571

Posted: Wed Apr 15, 2020 8:55 pm Post subject: Unfair 041520

Hello all,
Enjoy the puzzle...

Code:

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

Play this puzzle online at the Daily Sudoku site

cheers...immp

Clement

Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania

Posted: Fri Apr 17, 2020 9:15 pm Post subject: Unfair 041520

Three Steps

Code:

+--------------------+------------------------+---------------------+
| 8 4 235 | 237 1 6 | 2357 257 9 |
| 1 79 2359 | 23479 2349 2349 | 6 8 235 |
| 367 679 239 | 2379 8 5 | 237 4 1 |
+--------------------+------------------------+---------------------+
| 2 8 7-1 | 345 6 c34* | 9 f17 345 |
| 36 169 4 | 2359 7 239 | 8 1256 235 |
| 367 5 d39 | 1 d2349 8 |e237 267 234 |
+--------------------+------------------------+---------------------+
| 4 b17 b167 |b238 5 b23 |b12^ 9 68 |
| 9 3 8 | 6 c2*4 1 | 245 25 7 |
| 5 2 a16 |c489 c49 7 | 14 3 68 |
+--------------------+------------------------+---------------------+

Step 1: (1=6)r9c3 - (6=172^38)r7c23764 - (8=492*)b8p578&(3=4*)r4c6 - (2*4*=39)r6c35 - (32^=7)r6c7 - (7=1)r4c8 => - 1r4c3

Code:

+----------------+-------------------+--------------------+
| 8 4 235 | 23 1 6 | 2357 257 9 |
| 1 9 235 | 7 234 234 | 6 8 235 |
| 7 6 23 | 9 8 5 | 23 4 1 |
+----------------+-------------------+--------------------+
| 2 8 7 | 345 6 a34 | 9 1 345 |
| 36 1 4 | 235 7 9 | 8 256 235 |
| 36 5 9 | 1 23-4 8 | 237 267 234 |
+----------------+-------------------+--------------------+
| 4 7 16 | 238 5 b23 | 12 9 68 |
| 9 3 8 | 6 c24 1 | 245 25 7 |
| 5 2 16 | 48 9 7 | 14 3 68 |
+----------------+-------------------+--------------------+

Step 2: XY-Wing (4=3)r4c6 - (3=2)r7c6 - (2=4)r8c5 => - 4r6c5

Code:

+----------------+-------------------+--------------------+
| 8 4 235 | 23 1 6 | 2357 257 9 |
| 1 9 235 | 7 f234 g34-2| 6 8 a235 |
| 7 6 23 | 9 8 5 | 23 4 1 |
+----------------+-------------------+--------------------+
| 2 8 7 | 345 6 34 | 9 1 35 |
| 36 1 4 |c235 7 9 | 8 256 b235 |
| 36 5 9 | 1 d23 8 | 237 267 4 |
+----------------+-------------------+--------------------+
| 4 7 16 | 238 5 23 | 12 9 68 |
| 9 3 8 | 6 e24 1 | 245 25 7 |
| 5 2 16 | 48 9 7 | 14 3 68 |
+----------------+-------------------+--------------------+

Step 3: (2)r2c9 = r5c9 - r5c4 = r6c5 - (2=4)r8c5 - r2c5 = (4)r2c6 => - 2r2c6; stte

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