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  Topic: A VH rated too hard by Draw/Play 110521
dongrave

Replies: 8
Views: 1231

PostForum: Other puzzles   Posted: Sat Nov 06, 2021 9:19 pm   Subject: A VH rated too hard by Draw/Play 110521
LOL!!! Blind spots indeed! I went through the motions with Draw/Play just to see if I could pinpoint it's weakness. It clearly has trouble identifying Naked Triples, or at least in this case it had tr ...
  Topic: Nov 03 VH
dongrave

Replies: 6
Views: 1068

PostForum: Daily Sudoku puzzles   Posted: Wed Nov 03, 2021 3:04 pm   Subject: Nov 03 VH
I used the 8 X -Wing as the 1st step and then the 356 XYZ-Wing with pivot at r8c7 (-3r9c7) as the 2nd step.
  Topic: Extreme 103021
dongrave

Replies: 3
Views: 1472

PostForum: Other puzzles   Posted: Sat Oct 30, 2021 11:48 pm   Subject: Extreme 103021
Thanks for the puzzle Immp! I enjoyed that.

After basics:
+---------------+--------------+-------------+
| 256 569 8 | 29 34 1 | 256 34 7 |
| 3 679 4 | 279 5 69 | 26 1 ...
  Topic: VH+ 102521
dongrave

Replies: 6
Views: 1595

PostForum: Other puzzles   Posted: Wed Oct 27, 2021 1:25 pm   Subject: VH+ 102521
Nice solutions you guys!
  Topic: All Hail Danny (4)
dongrave

Replies: 12
Views: 1932

PostForum: Other puzzles   Posted: Sat Oct 23, 2021 4:48 pm   Subject: All Hail Danny (4)
I found a slightly shorter chain than my original one.

2*r2c3-(2=7)r2c5-(27=5)r2c7-(5=2)r4c7-(2=1|5)r4c13-(2*5=9)r5c3-(59=2)r5c1-[(2=4*)r5c4 -(2=5)r9c1]-(4*5=3)r9c4-(34*=7)r7c4-r8c4=r8c9-(7=2)r6c9- ...
  Topic: All Hail Danny (4)
dongrave

Replies: 12
Views: 1932

PostForum: Other puzzles   Posted: Sat Oct 23, 2021 12:25 pm   Subject: All Hail Danny (4)
Well done dongrave!

Was it a relative of this one ?

-2r1c4=r5c4-r6c5=r6c89-(2=5)r4c7-(5)r56c8=r3c8-r3c2=r8c2-r8c5=r1c5 means r1c4<>5 and r1c5<>2

Thanks Mogulmeister! No, yours ...
  Topic: All Hail Danny (4)
dongrave

Replies: 12
Views: 1932

PostForum: Other puzzles   Posted: Fri Oct 22, 2021 4:07 pm   Subject: All Hail Danny (4)
Thanks for the puzzle Mohulmeister! Here's the grid after basics:

+--------------+--------------+-----------------+
| 7 8 6 | 235 235 9 | 4 1 23 |
| 4 3 25 | 6 27 1 ...
  Topic: VH+ 100521
dongrave

Replies: 3
Views: 1679

PostForum: Other puzzles   Posted: Wed Oct 06, 2021 7:41 pm   Subject: VH+ 100521
Thanks for the puzzle immp! I settled for a 2-step solution and each step used a chain with a contradiction. I hope some others post their solutions!
  Topic: VH+ 100321
dongrave

Replies: 3
Views: 1982

PostForum: Other puzzles   Posted: Mon Oct 04, 2021 6:56 pm   Subject: VH+ 100321
After basics:

+----------------+--------------+---------------+
| 5 128 1278 | 478 9 6 | 1278 3 248 |
| 4 9 278 | 3 27 1 | 278 6 5 |
| 3 1268 12678 | 5 247 27 ...
  Topic: One from Ted
dongrave

Replies: 8
Views: 5051

PostForum: Other puzzles   Posted: Mon Sep 13, 2021 7:20 pm   Subject: One from Ted
Wow! Nice job Clement!
  Topic: One from Ted
dongrave

Replies: 8
Views: 5051

PostForum: Other puzzles   Posted: Sat Sep 11, 2021 2:23 pm   Subject: One from Ted
This one was too tough for me! I couldn't even find the possibility of a single step solution! I did see some back door solutions but of course they're no help when you're trying to solve it properl ...
  Topic: VH+ 090521
dongrave

Replies: 6
Views: 3155

PostForum: Other puzzles   Posted: Mon Sep 06, 2021 3:22 pm   Subject: VH+ 090521
I used the chain: 7r6c2-[(7=4*)r5c1 -(7=5)r6c9]-(57=2)r6c1-(24*=9)r1c1-(9=4)r1c2-(4=7)r8c2 contradiction => r6c2 <> 7; stte.
  Topic: very hard rated by draw and play
dongrave

Replies: 5
Views: 2980

PostForum: Other puzzles   Posted: Sat Sep 04, 2021 3:46 pm   Subject: very hard rated by draw and play
Hi Clement, I think you got tricked by the wrong rating! Your grid can be solved using just basics. There's a hidden pair 29 in row 2 (corrected on 09/05/21, it previously said 'column 2') which lea ...
  Topic: VH+ 082521
dongrave

Replies: 19
Views: 5937

PostForum: Other puzzles   Posted: Thu Aug 26, 2021 3:19 pm   Subject: VH+ 082521
Starting with TomC's grid, I used the following chain:
(9=6)r7c5 - (6=7)r7c7 - (67=4*)r7c8 - (4=2)r7c1 - (2=6)r2c1 - r2c78 = r1c8 - (4*6=3)r9c8 - (3=9)r9c2 => r7c3 <> 9; stte.
  Topic: A challenge for p&p
dongrave

Replies: 6
Views: 6453

PostForum: Other puzzles   Posted: Sun Aug 15, 2021 9:22 pm   Subject: A challenge for p&p
I enjoyed that! But am I right that it can be solved without any VH or VH+ moves? Let me know - because I'll redo it if I screwed up!
  Topic: VH+ 080421
dongrave

Replies: 7
Views: 3070

PostForum: Other puzzles   Posted: Sat Aug 07, 2021 9:23 pm   Subject: VH+ 080421
Starting with Mogulmeister's grid I used the following chain:
4r3c9-(4=2)r4c9-[(2=3)r4c6-(23=4*)r4c7 -(24=7)r7c9]-(4*7=2)r8c7-(2=3)r8c2-r3c2=r3c6 contradiction (i.e. 3r34c6) => r3c9 <> 4; st ...
  Topic: More Danny
dongrave

Replies: 5
Views: 3589

PostForum: Other puzzles   Posted: Wed Jul 14, 2021 8:36 pm   Subject: More Danny
After basics:
+-------------+---------------+---------------+
| 7 3 2 | 9 5 1 | 4 6 8 |
| 6 9 5 | 4 7 8 | 1 2 3 |
| 4 1 8 | 2 36 36 | 7 5 ...
  Topic: In Praise of Danny Jones
dongrave

Replies: 10
Views: 4560

PostForum: Other puzzles   Posted: Sun Jul 11, 2021 4:50 pm   Subject: In Praise of Danny Jones
I used a similar chain. (2-7)r8c5 = r8c6 - (7=2)r5c6 - r5c2 = r7c2 - r9c3 = r9c4 contradiction => r8c5 <> 2; stte.
  Topic: VH+ 070521
dongrave

Replies: 5
Views: 3603

PostForum: Other puzzles   Posted: Tue Jul 06, 2021 1:57 pm   Subject: VH+ 070521
My chain was similar to the others. 6r7c7 = r8c8 - (6=8)r1c8 - (68=1)r3c8 - (1=6)r3c5 => r7c5 <> 6; stte.
  Topic: VH 070221
dongrave

Replies: 3
Views: 3163

PostForum: Other puzzles   Posted: Tue Jul 06, 2021 1:54 pm   Subject: VH 070221
Since immpy said that it was a VH puzzle, I used the 4 X-Wing in rows 6 and 8 which then opened up a 29-7 XY-Wing which solved it.
 
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