View unanswered posts | View active topics It is currently Tue Oct 26, 2021 7:33 am

← Back to the Calcudoku puzzle page

Reply to topic  [ 2 posts ] 
 Bitwise Or 
Author Message

Posted on: Tue Aug 24, 2021 10:46 pm

Posts: 846
Location: Ladysmith, BC, Canada
Joined: Fri May 13, 2011 1:37 am
Post Bitwise Or
Today the Bitwise Or puzzle has me going in circles......have had so much trouble with the 6-4,2-6,2-4 and the 1-3,2-3,1-2 combinations......have attempted this puzzle 3 times now spending a full hour each time and no where near a solution and so have to give up on this one [cursing].....thought I would give it one more try (as all others were late last night) with a ---morning brain---and OMG, I fluked out and got a green screen woohoo [thumbup]


Posted on: Thu Aug 26, 2021 7:48 am

Posts: 148
Joined: Sun Jan 31, 2016 7:52 am
Post Re: Bitwise Or
Below is an image showing how the puzzle can be solved, it demonstrates that X pairs (or x wings) can still be useful if a value is in a cage with 3 cells.

1. h2=3 (h2 is the only cell in column h that can be 3)
2. g2=2
3. cage g4 = 4,6
4. noting the pair in cage g4: cage g6 = 5,8
5. the cells in cage a6 can be anything, but one of the cells must be 8

This gives us an X pair with the value 8 in rows 6&7 (the cells coloured blue)

6. cage d6 = 1,7
7. both cages d7 & f7 =1,2,3

Now we have the X pair from step 5, paired values in cage d6, and a 3 way pair in cells d7,e7,f7 with the values 1,2,3 , and that is all that is needed to complete the puzzle only using basic steps (I know 3 way pair must be the wrong phrase, but you know what I mean).


Display posts from previous:  Sort by  
Reply to topic   [ 2 posts ] 

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum

Search for:
Jump to:  
All forum contents © Patrick Min, and by the post authors.

Forum software phpBB © 2000, 2002, 2005, 2007 phpBB Group.
Designed by STSoftware.