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immpy
Joined: 06 May 2017
Posts: 571
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 Posted: Thu Mar 02, 2023 7:14 pm Post subject: VH+ 030223 |
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Hello all, enjoy the puzzle.
| Code: |
+-------+-------+-------+
| . 5 . | 2 . 7 | . 3 . |
| 7 . 4 | . . . | 2 . 8 |
| . 2 . | . . . | . 4 . |
+-------+-------+-------+
| . . 1 | 9 7 3 | 5 . . |
| . . . | . . . | . . . |
| . . 2 | . . . | 9 . . |
+-------+-------+-------+
| 5 . . | . 1 . | . . 7 |
| 2 . . | 8 . 6 | . . 4 |
| . 3 . | . 5 . | . 6 . |
+-------+-------+-------+
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Play this puzzle online at the Daily Sudoku site
cheers...immp |
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dongrave
Joined: 06 Mar 2014
Posts: 568
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| Posted: Sat Mar 04, 2023 6:55 pm Post subject: |
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Thanks for the puzzle immp!
After basics:
| Code: | +------------------+---------------+---------------+
| g189 5 f89* | 2 4 7 | 6 3 a1*9 |
| 7 169 4 | 35 369 159 | 2 19 8 |
| n169 2 3 | m16 689 189 | 7 4 5 |
+------------------+---------------+---------------+
| h468 468 1 | 9 7 3 | 5 28 26 |
| 3689 6789 5 | L16 2 18 | 4 78 36 |
| i368 678 2 | 45 k68 45 | 9 178 j136 |
+------------------+---------------+---------------+
| 5 489 6 | 34 1 249 | 38 29 7 |
| 2 19 7 | 8 39 6 | 13 5 4 |
| e14*89 3 c89 | 7 5 249 | d18 6 b29 |
+------------------+---------------+---------------+
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Then I used the following: (1*-9)r1c9=r9c9-(9=8)r9c3-[(8=1)r9c7-(189=4*)r9c1 -(8=9*)r1c3]-(1*9=8)r1c1-(4*8=6)r4c1-(68=3)r6c1-(1*3=6)r6c9-r6c5=r5c4-(6=1)r3c4-(19*=6)r3c1 contradiction (i.e. 6r34c1) => r1c9 <> 1; stte. |
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Clement
Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania
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| Posted: Wed Mar 08, 2023 4:52 pm Post subject: VH + 030223 |
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Two steps | Code: |
+---------------------+------------------+-------------------+
|a189 5 89 | 2 4 7 | 6 3 b19 |
| 7 169 4 | 35 369 159 | 2 19 8 |
| 169 2 3 | 16 689 189 | 7 4 5 |
+---------------------+------------------+-------------------+
| 468 468 1 | 9 7 3 | 5 28 26 |
| 3689 6789 5 | 16 2 18 | 4 78 36 |
| 368 678 2 | 45 68 45 | 9 178 136 |
+---------------------+------------------+-------------------+
| 5 489 6 | 34 1 249 | 38 29 7 |
| 2 19 7 | 8 39 6 | 13 5 4 |
| 489-1 3 c89 | 7 5 249 |c18 6 c29 |
+---------------------+------------------+-------------------+
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Step 1: (1)r1c1 - (1-9)r1c9 = (981)r9c937 => - 1r9c1
| Code: |
+------------------+-----------------+------------------+
| 189 5 89 | 2 4 7 | 6 3 d19 |
| 7 6 4 | 5 3 b19 | 2 c19 8 |
| 19 2 3 | 16 68 189 | 7 4 5 |
+------------------+-----------------+------------------+
| 46 48 1 | 9 7 3 | 5 28 26 |
| 369 a789 5 | 16 2 a18 | 4 a78 36 |
| 36 78 2 | 4 68 5 | 9 178 136 |
+------------------+-----------------+------------------+
| 5 4-9 6 | 3 1 24 | 8 29 7 |
| 2 1 7 | 8 9 6 | 3 5 4 |
|f489 3 f89 | 7 5 24 | 1 6 e29 |
+------------------+-----------------+------------------+
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Step 2: (9=7|81)r5c286 - (1=9)r2c6 - r2c8 = r1c9 - r9c9 = (9)r9c13 => - 9r7c2; stte |
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glesco
Joined: 12 May 2022
Posts: 36
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| Posted: Fri Mar 10, 2023 7:57 pm Post subject: |
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Several Steps:
I) X-wing removing 9s from r1c1, r9c1, r9c6
II) xy-chain with anchors at r8c2 & r9c7 removing 1s from r9c1, r8c7
III) Finned x-wing removing 1 from r5c9
IV) W-wing removing 3s from r5c1, r6c9
V) xy-chain with anchors at r5c8 & r6c2 removing 7s from r5c2, r6c8 |
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immpy
Joined: 06 May 2017
Posts: 571
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| Posted: Sat Mar 11, 2023 10:34 pm Post subject: |
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Nice path glesco. I don't mind using multiple steps to solve; the one-step solutions are impressive by those that go that route.
cheers...immp |
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