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

Posts: 844
Joined: Fri May 13, 2011 1:37 am
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 .....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

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

Posts: 146
Joined: Sun Jan 31, 2016 7:52 am
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).

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