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Two Truths And A Lie by zetamath
🕑 Added 2021-11-01 22:01:01 +0000 UTCHi all,
As mentioned on the channel in the last few days, Simon attempted this extraordinary puzzle by zetamath recently. We intended this to be a patreon-only video but there has been a huge appeal for it to appear on the main channel too. Thank you to those patrons in particular who expressed the view that this would be appropriate for such an amazing sudoku. We're delighted to tell you that it will still appear exclusively here first - link below. We've also included a detailed explanation of all the rules below too.
Play the puzzle at this link:
https://app.crackingthecryptic.com/sudoku/NFhHj2bQ2g
Rules: Normal sudoku rules apply. Each of the following standard clue types occurs exactly three times in the grid: white dots, black dots, arrow, sandwich, Xs, Vs, thermos, quadruples, odds (grey circles), evens (grey squares), renban (purple) and German whispers (green). For each of those clue types, exactly two of the appearances of that clue are correct and the other is incorrect. [A clue is incorrect if it is not fully correct. Eg an incorrect quadruple might see one of the digits but not all of them.]
The "standard" clue types mentioned above are as follows:
White dots: Cells separated by a white dot must contain consecutive digits.
Black dots: Cells separated by a black dot must be in the ratio of 1:2 (so one digit must be double the other).
Arrow: Digits on an arrow must sum to the digit in that arrow's circle.
Sandwich: Clues outside the grid give the sum of the digits sandwiched between the 1 and 9 in that row/column.
Xs: Cells separated by an X must contain digits summing to 10.
Vs: Cells separated by a V must contain digits summing to 5.
Thermos: Along a thermometer, digits must increase from the bulb end.
Quadruples: Digits in the small circles in the grid must appear at least once in every cell touched by the circle.
Odds: Cells containing a grey circle must contain an odd digit.
Evens: Cells containing a grey square must contain an even digit.
Renban: Each purple line must contain a set of non-repeating consecutive digits (which can be in any order).
German Whispers: Adjacent digits on a green line must differ by at least 5.
And Simon's attempt:
Comments
Athel Stan
What a brute. Simon said he thought zetamath's other liar puzzle was more difficult, but my creaky old brain found this one much harder. Great puzzle though.
I just did the puzzle. with some hints from Simon's video :D, but also had some nice smart thoughts on my own. At the end I thought I had broken it, but I only missed a pencil mark in one cell. I was so glad when I realized it was not broken. The puzzle is really incredibly clever. Don't know if it is the best sudoku ever, but it is centainly one of the best out there. Thanks zetamath for the puzzle and thanks Simon for the video :)
Finally got time to sit down with this puzzle, and am really happy that I managed to get through it. Took me over an hour, but really pleased that I found the logical route through and didn't have to guess! Now to watch Simon's solve and see where I missed easy paths ;)
Awesome! Thanks for the video, couldn't have done it on my own but made it through with some of your help!
I became a Patreon just to watch this puzzle get solved. Happy to be here, can't wait to dive in. This channel is brilliant.
This really is a fantastic puzzle and after battling with it for 70 mins, I was excited to see your solve. Kudos to Zetamath for firstly coming up with such a neat idea, but also then being able to execute it with such aplomb!
Simon spontaneously reciting The Raven made my day :D
By all means share it with the world! I Patreon this channel not for the exclusives but because I love what you do and don't want it to stop :)
Thanks for sharing this GREAT puzzle
