Triddlers are logic puzzles that use number clues around a grid to create an image.
The clues encircle the entire grid.
The direction of the clues is horizontal, vertical, or diagonal. | |  |
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| Each clue indicates a group of contiguous triangles of like color. | |
 | | Group of 3 |
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| Between each group there is at least one empty triangle. | |
 | | Empty Triangle |
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| The clues are already in the correct sequence. | |  |
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| Groups of different colors may or may not have empty triangles between them. | |  |
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Solving a Puzzle
The red arrow marks the direction of the clues as well as the direction they should be placed on the grid.
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If we perform overlapping counting and count from the bottom up and from the top down, we can place 5 triangles of clue 6 on the grid. We can do the same for clues (2,3).
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Clue 4 already has 4 triangles on the grid. We can fill in the rest with background color.
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There are already 1 triangle and 2 triangles in the line of clue 4. We will add a triangle between them to make it a group of 4.
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The triangle marked in red has to be white to split the two groups of triangles. Now we can complete the line of clues (2,3).
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We can add the 4th triangle needed for clue 4 and complete the line of clues (1,2).
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There is only one empty triangle left to complete clues (1,1) and finish the puzzle.
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