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 24-Sep-2016

... by: ray

1. Use only basic strategies and the forcing bi-location cell set method. Start
with E8{2389} - bi-location cell for 8,tri-location cell for 3 and 8.Progressively
form the 3-element bi-location cell set E8A9B2,forcing only the 1-cell to 3-cell
run out values(no contradiction values) until E8A9B2 = (3,5,8) which gives the solution.Other bi-location cell solutions found were: A9B2E3 = (5,8,9).
2. Using this solution,with basic strategies, the following non bi-location cell
set solutions were found: D56J5 = (2,9,7), G5J26 = (5,5,8), A9EF8 = (5,3,9).
N.B: using basic to extreme strategies,J5 = 7 gave a 1-cell solution.

Saturday 24-Sep-2016

... by: JC Van Hay

Only using the exclusions by the solutions of a digit or of a unit :

1. Solving row D :
1D5 + 8D69 -> 0 solution; D7=1

8E8 + 5H7 -> 0 solution
8E8 + 2H7 + (17)H8 -> 0 solution; D9=8

2D1 -> 0 solution
9D1 + 2H7 -> 0 solution
9D1 + 5H7 + (36)B7 -> 0 solution; D1=6
5 singles

2. Solving Column 7 :
6B7 + 5H7 -> 0 solution
6B7 + 2H7 + (17)H8 -> 0 solution
6J7 -> 1 unique solution

Saturday 24-Sep-2016

... by: anybody1

1 cell solution: 5A9 5B4 5C3 5J2


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