Strategies for Number Puzzles of all kinds
Print Version
Latest Apps

Valid XHTML 4.01 Transitional


Post an idea here...
Your Name or Handle

Your comment, idea or question

Please enter the
letters you see:
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.

Saturday 28-Nov-2015

... by: JC Van Hay

Typo : read C4=5 ... C4=1 in step 2

Saturday 28-Nov-2015

... by: ray

#1. Use only basic throughout.Get working board and apply bi-location tool.
#2. Choose D4{189} - bi-location cell for 1 and tri-location cell for 1 and 8.
Need to form,progressively,the 2-element bi-location cell set DH4.Only force the 1-cell to 2-cell run out values(no contradiction values) until DH4 =
(8,2) which gives the solution.Other bi-location sets found to give the solu-
tion were: A1D8H4 = (5,5,2), D8E1H4 = (5,8,2).
#3. Using the solution,other non bi-location set solutions found were: FJ7J8 = (8,2,7),A679 = (2,5,7), HJ4 = (2,5), H45 = )2,7); no 1-cell solutions
were found.

Saturday 28-Nov-2015

... by: JC Van Hay

0. E4=C6=6; Pointing(4A13)-4A46
1. The solutions of the Double Exocet (1357){C13, B78, Colums259} -> B2=9, C8=2, A46=29; -(13)E18, -(35)F2677, -(17)G2678, -(57)H148; -4G9

The puzzle is now "solvable". Or ...

2. C3=5 -> H5=5, Pointing(5A23), Singles to contradiction; C3=1 and 15 Singles

3. A4=2 -> A6=9, Skyscraper(9EH1,9HD4)-(9=8)D3, Singles to contradiction; A4=9 and 13 Singles

4. XYWing(248)G36.H4-(2=8)H3; Singles to unique solution.


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, 2011-2014