Calcudoku puzzle forumhttps://www.calcudoku.org/forum/ Step by step solution of a difficult 8x8 mod function puzzlehttps://www.calcudoku.org/forum/viewtopic.php?f=3&t=1250 Page 1 of 1

 Author: tusky  [ Tue Jun 30, 2020 2:43 am ] Post subject: Re: Step by step solution of a difficult 8x8 mod function pu Hello clm and thank you for taking the time to make this very detailled step by step solution!I used the same global strategy, although far less efficiently. In step 2, I didn't see this quick cul-de-sac and had to dig deeper to find the correct position for the '5'. But in step 3, I had to dig a LOT deeper. Completely missed the '7's, so no quick and easy clearing of the '8' hypothesis. Argghhh... I'll try to better observe the puzzle next time! Thanks again!

 Author: ineedaname  [ Thu Jul 02, 2020 5:02 am ] Post subject: Re: Step by step solution of a difficult 8x8 mod function pu Thankyou CLM much appeciated as always.

 Author: michaele  [ Thu Jul 02, 2020 12:35 pm ] Post subject: Re: Step by step solution of a difficult 8x8 mod function pu I think clm as made it more difficult than it needs to be. Below is my method.It should be straight forward to get to this stage:From there follow these steps.1. c1 is not 2, refer to cages in columns 3&42. d5 is not 5, refer to row 6 would have no cell that could be 13. add rows 7 & 8, this eliminates 3 & 5 from g7, and 2 from g8 & h84. g8 is not 4, refer to row 6, no cell has a 75. b8 is not 6, as above, no cell in row 6 has a 76. e8 or f8 must be 2, therefore e8 & f8 can not be 4, cage b7(14+) has no possible values7. e5 is not 5, this would give us 3&7 in cells e6 and e7, this creates a parallel cell value conflict with e2 & f2From this point it is all basic methods to complete the puzzle.

 Author: tusky  [ Fri Jul 03, 2020 4:59 am ] Post subject: Re: Step by step solution of a difficult 8x8 mod function pu michaele wrote:1. c1 is not 2, refer to cages in columns 3&4(I think you meant columns c&d) Could you expand, please? I fail to see how you deduced that.

 Author: michaele  [ Fri Jul 03, 2020 7:23 am ] Post subject: Re: Step by step solution of a difficult 8x8 mod function pu Quote:(I think you meant columns c&d) Could you expand, please? I fail to see how you deduced that.Yes I did mean columns c & d, Quote:1. c1 is not 2, refer to cages in columns c&dIf we try 2 in c1, we can test the cages in columns c & d as follows:cage c2 (192x) would become c2=1, c3=8, d2=4,6, d3=4.6cage c5 (14+) would become c5=5, c6=3, d5=3cage c8 (3mod) then has no possible values, therefore c1 can not be 2This image shows what I mean.

 Author: tusky  [ Fri Jul 03, 2020 11:39 pm ] Post subject: Re: Step by step solution of a difficult 8x8 mod function pu Thank you.

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