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Kakuro Kakuro
How to play Kakuro
Kakuro is similar to both sudoku and traditional crossword games.
Like a Crossword
Similar to crosswords, Kakuro has clues both across and down. When you put numbers in the vacant squares, the sum must equal the given clues. This is why the game is sometimes called 'cross sums'.
Like a Sudoku
Just like a sudoku, you cannot have the same number in a row or column. If a row is broken into 2 areas by a clue, then you can have the same number occuring once in each of the separate areas.
Other variations
Still looking for more puzzles? How about a variation on sudoku? Try Wordoku. Wordoku uses letters instead of numbers and has a hidden 9-letter word! For crossword puzzles, try Free Crossword PUzzles. 2 free crosswords (Easy, Hard) daily.

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Hard Kakuro for 5/October/2010


 
  
 11 
  
 21 
 
  
 21 
  
 38 
 
  15
  
           
  15
  
   
  16
 28 
     
 
  28
  
         
 
  10
  
       
  
 7 
 
  8
  
   
  13
  
   
 
  31
  
         
Choose a number, and place it in the grid above.
  1 2 3 4 5 6 7 8 9
This number is a possibility
Talk about anything and everything, but nice to each other - you don't have to agree, but this is not the place for personal attacks. As Sir Paul McCartney said: 'I used to think anyone doing anything weird was weird. Now I know that it is the people that call others weird that are weird' (longer explanation). Enjoy!
solved 13 cells and then needed orphans to continue (instead of using a relatively short trial and error chain)
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used orphans then all fine
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no orphans but used a short trial and error chain
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orphan needed
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Did it like Shabbir, no orphans but a very short trial and error chain on the cell at the bottom right corner
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Good puzzle. I have long thought that a solution is 'better' if it can be done by pure logic, without resorting to guessing (aka trial and error chains). Recently, I have realized that the 'logical' solution involves solving a lot of short trial and error chains that are so obvious you see them More...
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Mike, sorry but I disagree! Heuristics are not the same thing as trial and error, we humans use heuristics to avoid the tediousness of trial/error and to solve puzzles fast. Of course both lead to the same solution by definition because the puzzle has only one solution, but the finding the same solution doesn't mean that heuristics and t/e are the same.
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Chris, I used to think the same thing as you, and perhaps we don't disagree now. By 'trial and error,' I'm not talking about plugging numbers in randomly. There comes a point in solving the problem when you have solved a bunch of squares and have isolated possiblities for others, but you're More...
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Come on guys - put your times in. I use your times to check on how I'm improving!
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hcs, I don't time my solutions, because I'm doing this for fun and like to take my time doing it. I can understand trying to do it as quickly as possible, but I do this with my morning coffee and don't want to rush it. Also, I don't really believe a lot of the times I see posted.
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7:51 FYI, hcs. :-) (That was being stubborn and finishing the puzzle without using orphans.)
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Slower is frequently more rewarding.
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6:32, due to missing the obvious for a looong time.
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Mike, seems like we more or less agree on basis there are three methods
1. heuristics
2. ugly trial and error
3. experience based logic (your 4 squares totalling 10)
I find 2 to be avoided and I call 3 'thinking', sometimes the 'thinking' involves making a in-head t/e chain, so I agree basically, the thinking vs. t/e is on a grey scale
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I am so glad to finally see this discussion. I've long thought that one person's t/e is another's heuristic. As for timing, I'm pretty certain we are not all timing ourselves in the same manner. Each of us probably figures our way is the 'right' way to use the timer, but I'll bet in reality we More...
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5:28
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516, no orphans
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4:54
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Straightforward with late orphans, 2018
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2:42 in 2018
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