A special National Cipher Challenge for extraordinary times › Forums › Bureau of Security and Signals Intelligence Forum › GCHQ Puzzle Challenge
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7th April 2020 at 2:00 pm #47129HarryKeymaster
Once you have solved the latest GCHQ puzzle challenge post your time here. (No cheating – honour code!) Once the next puzzle is published you can also discuss your solutions to previous ones, but not before! Have fun,
Harry and GCHQ_Puzzle_Master
7th April 2020 at 4:24 pm #4715910degrees-adminKeymaster16:23, 7 minutes.
7th April 2020 at 4:58 pm #4716610degrees-adminKeymasterI don’t know where to find the challenge.
7th April 2020 at 5:00 pm #47168HarryKeymasterIt would have helped if I had added the link to the post! Fixed now.
Harry
7th April 2020 at 5:04 pm #4716910degrees-adminKeymasterShall I email my full solution too, including the location of the mines?
[Edited by Harry: No need, we are applying the honour code here. If someone in BOSS says they solved it, we believe them! We won’t post solutions on the forum as we want to keep the puzzles interesting for everyone else!]
7th April 2020 at 5:12 pm #4717210degrees-adminKeymaster5 minutes 30 seconds, ms paint is very useful for doing it on along with a piece of paper
7th April 2020 at 5:36 pm #4717510degrees-adminKeymaster22 shameful minutes and 24 seconds
7th April 2020 at 5:37 pm #47177HarryKeymasterNo puzzle-shaming allowed on these forums!
Harry
7th April 2020 at 6:50 pm #4718310degrees-adminKeymasterAlthough using brute force i solved it under 10 minutes
7th April 2020 at 6:51 pm #47186HarryKeymasterAdmirable honesty. Might be worth thinking about how it can be done without BF.
7th April 2020 at 10:25 pm #4719110degrees-adminKeymaster12:28
7th April 2020 at 10:29 pm #47192Inactive15 minutes – would have been 12 but that last leftmost C cost me 3 minutes! Any one else find that?
8th April 2020 at 2:43 pm #4724010degrees-adminKeymasterThere is a way to do it without brute force – use logic! (It would help if you were good at Minesweeper…)
8th April 2020 at 4:24 pm #4723910degrees-adminKeymaster9 minutes, 29.83 seconds
8th April 2020 at 4:24 pm #4726710degrees-adminKeymaster8 minutes 18 seconds, minesweeper experience definitely came in handy.
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