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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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 Posted: Fri Nov 19, 2010 12:58 am Post subject: A not so easy Menneske |
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Some of you may be aware that a Menneske request for a "super hard" often results in a "very hard" that is quite difficult. Here is one such:
| Code: | Puzzle: M348400sh(0)
+-------+-------+-------+
| 1 . 8 | 7 . . | 3 . 2 |
| . . . | . 3 9 | . . . |
| . . 6 | . 8 . | 7 . . |
+-------+-------+-------+
| . 7 . | 9 . . | . . 5 |
| . 1 5 | . . . | 4 6 . |
| 8 . . | . . 4 | . 7 . |
+-------+-------+-------+
| . . 3 | . 4 . | 5 . . |
| . . . | 6 9 . | . . . |
| 5 . 9 | . . 7 | 6 . 4 |
+-------+-------+-------+ |
Keith |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Fri Nov 19, 2010 2:06 am Post subject: |
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I'm not familiar with Menneske's VHs, so I don't know what to expect. Are the VHs you get from clicking SH the same level of difficulty as if you clicked VH?
| Quote: | | A four-cell XY-Chain. R3c9=1-->r2c7=8-->r8c7=2-->r7c8=9; r13c8, r7c9<>9 |
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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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| Posted: Fri Nov 19, 2010 4:32 am Post subject: |
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| Marty R. wrote: | | I'm not familiar with Menneske's VHs, so I don't know what to expect. Are the VHs you get from clicking SH the same level of difficulty as if you clicked VH? |
I believe so. The Menneske difficulty seems to be based on some heuristic, not on solving the puzzle. To me, this unpredictability is part of the charm.
Here is a "VH" which seems quite difficult: | Code: | Puzzle: M136122vh
+-------+-------+-------+
| 1 4 . | . . 8 | . . . |
| . . . | 9 . . | 4 . 5 |
| 7 . . | . 2 . | . . . |
+-------+-------+-------+
| 2 9 . | . 5 6 | . 8 . |
| . . 3 | . . . | 7 . . |
| . 7 . | 3 8 . | . . 4 |
+-------+-------+-------+
| . 2 . | . 9 . | . . . |
| . . . | . . 5 | . . 8 |
| . 1 . | 8 . . | 5 . 6 |
+-------+-------+-------+ |
Keith |
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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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| Posted: Fri Nov 19, 2010 6:05 am Post subject: |
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Marty,
To be clear:
You can choose a VH puzzle at Menneske.
You can also choose a SH, which often results in a VH.
I do not know if either of these results in puzzles that are indeed of different levels of difficulty.
I can imagine, but I do not know.
Keith. |
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storm_norm
Joined: 18 Oct 2007
Posts: 1741
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| Posted: Fri Nov 19, 2010 6:53 am Post subject: |
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| Code: | +-----------------+--------------+-----------------+
| 1 49 8 | 7 5 6 | 3 49 2 |
| (24) 245 7 | 124 3 9 | 18 458 6 |
| (234) 23459 6 | 124 8 12 | 7 459 -1(9) |
+-----------------+--------------+-----------------+
| 6(3) 7 4 | 9 16 38 | 128 238 5 |
| 9 1 5 | 28 7 238 | 4 6 38 |
| 8 6(3) 2 | 5 16 4 | 9 7 (13) |
+-----------------+--------------+-----------------+
| 267 26 3 | 18 4 18 | 5 29 (79) |
| (247) 24 1 | 6 9 5 | 28 238 38(7) |
| 5 8 9 | 3 2 7 | 6 1 4 |
+-----------------+--------------+-----------------+ |
(9)r3c9 = (9-7)r7c9 = (7)r8c9 - ALS[(7)r8c1 = (3)r3c1]r238c1 - (3)r4c1 = (3)r6c2 - (3=1)r6c9; r3c9 <> 1 |
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peterj
Joined: 26 Mar 2010
Posts: 974
Location: London, UK
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| Posted: Fri Nov 19, 2010 8:31 am Post subject: |
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Unless I made a mistake it seemed barely VH - a single turbot move solves it
| Code: | | kite(2) c4, r9 with transport -(2)r5c9=r1c9 ; r12c8<>2 |
[Edit] Sorry! I now see that Keith posted two puzzles and I just cut and paste thinking the grids were the same. This is a solution for the second one. |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Fri Nov 19, 2010 1:23 pm Post subject: |
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| Code: | Puzzle: M136122vh
+-------+-------+-------+
| 1 4 . | . . 8 | . . . |
| . . . | 9 . . | 4 . 5 |
| 7 . . | . 2 . | . . . |
+-------+-------+-------+
| 2 9 . | . 5 6 | . 8 . |
| . . 3 | . . . | 7 . . |
| . 7 . | 3 8 . | . . 4 |
+-------+-------+-------+
| . 2 . | . 9 . | . . . |
| . . . | . . 5 | . . 8 |
| . 1 . | 8 . . | 5 . 6 |
+-------+-------+-------+ |
Keith,
Two puzzles in one thread can get confusing. 
Type 1 UR (13); r7c9=7
Coloring (1); r3c4<>1 |
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peterj
Joined: 26 Mar 2010
Posts: 974
Location: London, UK
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| Posted: Fri Nov 19, 2010 1:54 pm Post subject: |
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For the first puzzle this xy-chain does the job...
| Code: | | xy-chain ; (9=2)r7c8 - (2=6)r8c2 - (6=3)r6c2 - (3=1)r6c9 - (1=9)r3c9 ; r13c8<>9, r7c9<>9 |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Fri Nov 19, 2010 2:54 pm Post subject: |
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Several ADP patterns were present; here is one that is a single-stepper..........
AUR(38)r458c689; r2c8=8
SIS 3: r56c6 use b5=>empty; r48c8 use c8=>empty; r5c9 use r5=>empty; r8c9 use b9=>empty
SIS 8: r56c6 use b5=>r5c4=8; r48c8 use c8=>r2c8=8; r58c9 use c9=>empty
(8)r2c8;
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(8)r5c4-(8=3)r5c9-(3=1)r6c9-r4c7=(1-8)r2c7=(8)r2c8;
Ted |
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