A difficult TriDoku (Triangular Sudoku variant) puzzle

After a couple of Killer TriDokus and a TriDoku X, I’d like to show you a classic TriDoku puzzle but somewhat more difficult (or so I think). For those who are still unfamiliar with this type of triangular Sudoku variation puzzle, please refer to the introductory article. Other TriDoku puzzles can be found in Sudoku variants category. And finally, here is the puzzle. TriDoku for Monday, June 14, 2010. Difficulty: IQ
(click to download or right-click to save the image!)

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To see the solution to this puzzle click here
Comments? Questions? Please!
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  1. Posted December 30, 2010 at 1:18 am | Permalink

    Re the TRIDOKU on 14 June 2010; is there a mistake in the center composite triangle? I keep getting two 5s and no 6. As noted in the answer as well. Otherwise a very nice puzzle – please lets have another, thanks, N8

  2. Posted December 30, 2010 at 9:19 am | Permalink

    Nate, not sure whеre the problem is. Please be more specific. The solution shown with the puzzle is correct. I know that the rules of Tridoku can be a little confusing but it’s certainly worth your while to figure them out.

    If you can type your solution here I will tell you where you went wrong. Something like this:

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