Strategies for Number Puzzles of all kinds
Caution!
Print Version
Solvers
Puzzles
Latest Apps
Str8ts
Other


Valid XHTML 4.01 Transitional


Discussion...


Post an idea here...
Your Name or Handle

Your comment, idea or question

Please enter the
letters you see:
arrow
Enter these letters
Remember me


Please keep your comments relevant to this puzzle.
Email addresses are never displayed, but they are required to confirm your comments. To state your solve time use the smaller form at the top right of this page." & vbNewLine & _ Line breaks and paragraphs are automatically converted ? no need to use <p> or <br> tags.

Wednesday 15-Nov-2017

... by: flutter

@ray
Can you please give a detailed explanation for the "forcing bi-location cell set method"?
I don't understand how this would force D7 = 9.
Neither do i understand any of your other bi-location cell set methods in the other comments of weekly unsolvables.
Is your method not documented on the "Strategy Overview" or did i miss it somehow?
By "cell set method" you mean to start by assuming all candidates in a cell to be ON and then see, if a candidate in another cell behaves the same in all cases, correct?

Sunday 12-Nov-2017

... by: Vinny

Are we getting a new 271?

Saturday 11-Nov-2017

... by: Vinny & Manny

OK, our Excel Solver says this: in box 5 (central 3x3 area), top to bottom, left to right, enter 1 2 8 4 3 to the 5 blank cells there, and then, to the 4 blank cells that will be available in row 4, enter, left to right: 7 5 9 4. After that, it will finish in routine fashion.

Saturday 11-Nov-2017

... by: Andrew Stuart

Hi All. David Filmer has written to me to tell me this is a clone of #49 rotated 90 degress. I'm not sure how this got into his or my list to import. I intend to replace it shortly.

Saturday 11-Nov-2017

... by: ray

Error1 A5 not A2

Saturday 11-Nov-2017

... by: ray

1. Use basic strategies and the forcing bi-location/exocet cell set method.
Start with D7{2579} - bi-location cell for7,tri-location cell for 5 and 7.Progress-
ively form the 4-element cell set D7C7D46,forcing only the run out values for
the 1-cell to 4-cells values until D7C7D46 = (9,6,1,2) which gives the solution.

Using this solution,with basic strategies,the following non bi-location cell set
solution were found: GJ7 = (5,3), A2C46 = (2,4,8).

Saturday 11-Nov-2017

... by: JC Van Hay

Indeed, morph of #49

Saturday 11-Nov-2017

... by: Neil

Ariadne's Thread finds 4 in D8.

Saturday 11-Nov-2017

... by: Neil

I think this is a clone of 49.

Archive

Each week a new 'unsolvable' will be published and the previous will be accessible here from this archive section. If you like very tough puzzles, these are for you.
Share and Enjoy



Post a Comment using Facebook...

Page created on 03-May-2011, last modified on 03-May-2011.
All puzzles on this site are trademarked and copyright
and cannot be reproduced without permission.
Copyright Syndicated Puzzles Inc, 2011-2015