- Code: Select all
*-----------*
|.9.|267|.4.|
|..4|.3.|1..|
|...|1.4|...|
|---+---+---|
|.8.|.9.|.1.|
|412|378|965|
|.6.|.1.|.3.|
|---+---+---|
|...|6.9|...|
|..1|.4.|6..|
|.3.|751|.9.|
*-----------*
Play/Print this puzzle online
Vanhegan Extreme May 15, 2013
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Vanhegan Extreme May 15, 2013
by ArkieTech » Wed May 15, 2013 12:26 am
Play/Print this puzzle online
dan
-
ArkieTech - Posts: 3355
- Joined: 29 May 2006
- Location: NW Arkansas USA
Re: Vanhegan Extreme May 15, 2013
by Leren » Wed May 15, 2013 1:54 am
- Code: Select all
*--------------------------------------------------------------*
| 1 9 58 | 2 6 7 | 58 4 3 |
| 278 a27 4 | 9 3 5 | 1 b8-27 6 |
| 36 c5-27 36 | 1 8 4 | 257 d27 9 |
|--------------------+--------------------+--------------------|
| 357 8 357 | 45 9 6 | 247 1 247 |
| 4 1 2 | 3 7 8 | 9 6 5 |
| 57 6 9 | 45 1 2 | 478 3 478 |
|--------------------+--------------------+--------------------|
| 578 4 578 | 6 2 9 | 3 578 1 |
| 9 257 1 | 8 4 3 | 6 257 27 |
| 268 3 68 | 7 5 1 | 248 9 248 |
*--------------------------------------------------------------*
A solution for DP fans: Potential DP (27) r23c28 + bi-value cells r2c2, r3c8 + Strong links 2 + 7 Boxes 1 + 3
2 r2c8 [ => 7 r2c2, r3c8 ] - r2c12 = r3c2: DP => -2 r2c8;
7 r2c8 [ => 2 r2c2, r3c8 ] - r2c12 = r3c2: DP => -7 r2c8;
2 r3c2 [ => 7 r2c2, r3c8 ] - r3c78 = r2c8: DP => -2 r3c2;
7 r3c2 [ => 2 r2c2, r3c8 ] - r3c78 = r2c8: DP => -7 r3c2; stte
A non-DP solution:
- Code: Select all
*--------------------------------------------------------------*
| 1 9 e58 | 2 6 7 |d58 4 3 |
| 278 27 4 | 9 3 5 | 1 c278 6 |
| 36 f257 36 | 1 8 4 | 257 27 9 |
|--------------------+--------------------+--------------------|
| 357 8 357 | 45 9 6 | 247 1 247 |
| 4 1 2 | 3 7 8 | 9 6 5 |
| 57 6 9 | 45 1 2 | 478 3 478 |
|--------------------+--------------------+--------------------|
| 578 4 578 | 6 2 9 | 3 b578 1 |
| 9 27-5 1 | 8 4 3 | 6 a257 27 |
| 268 3 68 | 7 5 1 | 248 9 248 |
*--------------------------------------------------------------*
Inverted W-wing: (5) r8c8 = (5-8) r7c8 = r2c8 - r1c7 = (8-5) r1c3 = r3c2 => -5 r8c2; stte
Leren
PS Corrected typos in Inverted W-wing - I had yet another dyslexic moment.
Leren
Last edited by Leren on Thu May 16, 2013 4:27 am, edited 1 time in total.
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Re: Vanhegan Extreme May 15, 2013
by pjb » Wed May 15, 2013 4:12 am
Using same DP (r23c28), different approach:
(5=8) r1c7 - (8=5) [DP r23c28] => -5r1c3, -5r3c7; stte
Phil
(5=8) r1c7 - (8=5) [DP r23c28] => -5r1c3, -5r3c7; stte
Phil
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Re: Vanhegan Extreme May 15, 2013
by ArkieTech » Wed May 15, 2013 11:24 am
- Code: Select all
*--------------------------------------------------*
| 1 9 58 | 2 6 7 | 58 4 3 |
|b278 b27 4 | 9 3 5 | 1 c278 6 |
| 36 b257 36 | 1 8 4 | 257 c27 9 |
|----------------+----------------+----------------|
| 357 8 357 | 45 9 6 | 247 1 247 |
| 4 1 2 | 3 7 8 | 9 6 5 |
| 57 6 9 | 45 1 2 | 478 3 478 |
|----------------+----------------+----------------|
| 578 4 578 | 6 2 9 | 3 578 1 |
| 9 a257 1 | 8 4 3 | 6 5-27 27 |
| 268 3 68 | 7 5 1 | 248 9 248 |
*--------------------------------------------------*
(27=5)r8c29-(5=8)r23c2,r2c1-(8=27)r23c8 => -27r8c8; ste
dan
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ArkieTech - Posts: 3355
- Joined: 29 May 2006
- Location: NW Arkansas USA
Re: Vanhegan Extreme May 15, 2013
by Marty R. » Wed May 15, 2013 4:08 pm
- Code: Select all
+-------------+--------+-------------+
| 1 9 58 | 2 6 7 | 58 4 3 |
| 278 27 4 | 9 3 5 | 1 278 6 |
| 36 257 36 | 1 8 4 | 257 27 9 |
+-------------+--------+-------------+
| 357 8 357 | 45 9 6 | 247 1 247 |
| 4 1 2 | 3 7 8 | 9 6 5 |
| 57 6 9 | 45 1 2 | 478 3 478 |
+-------------+--------+-------------+
| 578 4 578 | 6 2 9 | 3 578 1 |
| 9 257 1 | 8 4 3 | 6 257 27 |
| 268 3 68 | 7 5 1 | 248 9 248 |
+-------------+--------+-------------+
Play this puzzle online at the Daily Sudoku site
UR 27 r23c28 (5r3c2=8r2c8)-(8=5)r1c7=>r1c3<>5
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Re: Vanhegan Extreme May 15, 2013
by daj95376 » Wed May 15, 2013 4:38 pm
Leren wrote:
- Code: Select all
*--------------------------------------------------------------*
| 1 9 58 | 2 6 7 | 58 4 3 |
| 278 a27 4 | 9 3 5 | 1 b8-27 6 |
| 36 c5-27 36 | 1 8 4 | 257 d27 9 |
|--------------------+--------------------+--------------------|
| 357 8 357 | 45 9 6 | 247 1 247 |
| 4 1 2 | 3 7 8 | 9 6 5 |
| 57 6 9 | 45 1 2 | 478 3 478 |
|--------------------+--------------------+--------------------|
| 578 4 578 | 6 2 9 | 3 578 1 |
| 9 257 1 | 8 4 3 | 6 257 27 |
| 268 3 68 | 7 5 1 | 248 9 248 |
*--------------------------------------------------------------*
A solution for DP fans: Potential DP (27) r23c28 + bi-value cells r2c2, r3c8 + Strong links 2 + 7 Boxes 1 + 3
2 r2c8 [ => 7 r2c2, r3c8 ] - r2c12 = r3c2: DP => -2 r2c8;
7 r2c8 [ => 2 r2c2, r3c8 ] - r2c12 = r3c2: DP => -7 r2c8;
2 r3c2 [ => 7 r2c2, r3c8 ] - r3c78 = r2c8: DP => -2 r3c2;
7 r3c2 [ => 2 r2c2, r3c8 ] - r3c78 = r2c8: DP => -7 r3c2; stte
Some alternate perspectives.
- Code: Select all
Taking advantage of the ALS in [b1] (or [b3]).
+-----------------------------------------------------+
| 1 9 58 | 2 6 7 | 58 4 3 |
| 278 *27 4 | 9 3 5 | 1 *27+8 6 |
| 36 *27+5 36 | 1 8 4 | 257 *27 9 |
|-----------------+-----------------+-----------------|
| 357 8 357 | 45 9 6 | 247 1 247 |
| 4 1 2 | 3 7 8 | 9 6 5 |
| 57 6 9 | 45 1 2 | 478 3 478 |
|-----------------+-----------------+-----------------|
| 578 4 578 | 6 2 9 | 3 578 1 |
| 9 257 1 | 8 4 3 | 6 257 27 |
| 268 3 68 | 7 5 1 | 248 9 248 |
+-----------------------------------------------------+
# 47 eliminations remain
(5=8)r23c2,r2c1 - (8)r2c8; DP => r3c2=5 -or-
(8=5)r23c8,r3c7 - (5)r3c2; DP => r2c8=8
- Code: Select all
-or- non-ALS using <58> Naked Pair in [r1] combined with SL on <5> in [b1] and SL on <8> in [b3]
(5)r3c2 = r1c3 - (5=8)r1c7 - (8)r2c8; DP => r3c2=5
(8)r2c8 = r1c7 - (8=5)r1c3 - (5)r3c2; DP => r2c8=8
Addendum:
Just saw Marty's post. A nice alternative !
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