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Results tagged with grid-deduction
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user 5373
Puzzles such as Sudoku or Kakuro, where the final state of a pre-existing grid must be deduced logically through clues placed within and/or around the grid. Use with the [logical-deduction] tag. For puzzles where you are given a list of clues which can be used to compose a grid to solve them logically, use the [logic-grid] tag instead.
4
votes
Accepted
Very tricky nonogram - where to go next?
Duh, I got it.
Then
I'm guessing the deductions will fall like dominoes from there ...
- 117k
4
votes
Accepted
Another puzzle for who has long boring days
I put some row/column codes onto the grid:
Column 9 is easy to solve:
Now consider column 6.
In column 7,
Now consider column 0.
So far we have the following (numbers on the right of a …
- 117k
8
votes
Circles and Squares - A Grid Puzzle
Completed grid
Dark grey is shaded, light grey is unshaded.
Solution explanation
I'll explain the first few steps and then provide a gif to illustrate the rest.
Obviously, the first step is to mark …
- 117k
5
votes
Instructionless: Sieve of Eratosthenes
This answer complements the existing ones by @wl and @JS1, who found the actual solution of the puzzle. I just want to explain one aspect which seemed obvious to me but which isn't mentioned in the pr …
- 117k
9
votes
New logical puzzle
Final solution
Step-by-step deduction
There are five possible tetrominoes: L, T, O, I, S. There are four different symbols, giving six possible pairs of distinct symbols (blue-green, blue-yellow, …
- 117k
4
votes
Unequal Curfew - Donut Hole
Detailed deduction is as follows, with the final solution and illustrative GIF at the end.
Corner deductions
Top left region:
Bottom left region:
Top right region:
Bottom right region:
So far we h …
- 117k
7
votes
Accepted
9
votes
Accepted
The next steps for this Kakuro puzzle
Look at the rightmost column in the part you haven't solved yet:
- 117k
9
votes
Accepted
New puzzle for who has long boring days
I put it into a neater format:
Left column:
Bottom row:
Bottom-right square:
Long diagonal:
Middle bottom box:
Now putting $4$ in B3 leads to
So $4$ is in C3. Now putting $3$ in B3 leads …
- 117k
10
votes
Accepted
Kyudoku: Introduction
2 and 3
The 2 is already circled, so we can grey out all the other 2s in the grid.
8 and 9
There are only three ungreyed 8s in the grid now (on the fourth and fifth rows), so one of them must be circ …
- 117k
5
votes
Heyacrazy: Careening
Labelling the rows 1 (top) to 7 (bottom) and the columns A (left) to F (right), our first step is that
Next target to be shaded is
Now we have a few sets of squares of which at least one must be sha …
- 117k
5
votes
Accepted
Another puzzle combination (feat. Kakuro)
Well, that's an unusually neat Kakuro solution:
Presumably the other puzzle is something that involves
Yep, apparently it's called
- 117k
10
votes
Accepted
Heyawake - why is this wrong solution
Both solutions are correct. Probably your game doesn't check solution uniqueness well enough.
The rules of Heyawake, as given by your game, are:
A room containing a number must have the designat …
- 117k
5
votes
Accepted
Stuck on 6x6 skyscraper puzzle
Firstly, just to put your puzzle in editable format:
3 2 2 3 2 1
= = = = = =
4 | | | | |5|6| 1
= = = = = =
2 | | | | |4|5| 2
= = = = = =
2 | | | |5| | | 3
= = = = = =
1 …
- 117k
6
votes
Accepted
Akari: Another Light
Final solution
Step by step deduction
Some "easy" deductions (no lights around 0, lights in white squares surrounded by black, etc.) get us to here:
See that 1 in the fourth row, third column? …
- 117k