kimbro84 -> RE: Need help learning advanced kakuro strategies (10/12/2020 8:41:47 AM)
Your work is awesome! I found a couple tricks that worked, these are probably basic but you never know!
I've learned any connecting squares can't have repeating number
So if I have 4 squares
7 9 789
7 9 7 9
Then the top right corner HAS to be an 8. No matter if the squares are touching or are at opposite corners. So long as they have touching connectors, there can't be repeats. Another example:
7 9 789
7 9 789
The 2nd column will have to have an 8. I have found this useful for helping with removing possibilities from other cells.
Another thing I found out the hard way was making groups of 7 between 32 and 40 simpler. Groups of 8 are pretty cut and dry as is the 41,42 in 7, but the groups of 7 between 32-40 were really challenging me. Here's an example, let's use 39:
45-39 = 6. So there are 2 missing squares (because it only has 7 cells). The two missing squares, if there, would bring our total to 45. They have to equal six (45-39). So one of these groups below will NOT be found in the answer:
The answer must contain 9,8,7,6,3 and then 5,1 OR 4,2.
Here's an example for 34:
45-34=11. So the two 'missing squares' have to total 11.
I'll have to have
Answer will be ONLY three of these groupings and a '1'.
This really helps me when I have cell clues that are high and low because you can only have three high and three low. I've tried using this with groups of 5,6 but there were simply so many options once you are talking about 3 missing digits for most of the super hard puzzles. They throw in 25 in 5 and 32 in 6 and it's just too many options!
The other helpful things I learned:
17 in 5 always has a 321
18 in 5 always has a 21
19 in 5 always has a 1
20 in 5 doesn't have to have a 1. 6,5,4,3,2
21 in 5 has to have at least one cell with a 7+.
a 16 in three has to have at least a 7+,
a 19 has to have at least an 8+
a 25 in 6 has to have a 2 and a 1,
a 26 in 6 has to have a 1,
a 27 is the first in 6 that doesn't have to contain a 1 (7,6,5,4,3,2)
You prob know these easier ones 30 in 7 has a 5,4,3,2,1 then either a 9,6 or 8,7. Then 31 in 7 has the 4,3,2,1 and then either 9,7,5 or 8,7,6.
I do the big puzzle book so these smaller combinations are not something I'm used to. Sorry I don't have any guidance on the ones you posted. I'd love to hear some of your strategies. I see a lot of your grouping and relationships have all been tested out. YOu're definitely a step ahead of me! I'm disappointed there aren't more difficult/expert tips out there. Would sure love it! Keep up the good work.