15

From the SO answer to the essentially same question (test cases for Sudoku solver): You can find some large datasets for Sudoku benchmarking and testing in this project: https://github.com/t-dillon/tdoku See data.zip for the puzzles. See https://github.com/t-dillon/tdoku/blob/master/benchmarks/README.md for descriptions of the datasets, their sources, and ...


10

NOTE: This is a guide to solving polyalphabetic cryptograms as it says in the question, and not transposition ciphers like it says in the title This is called cryptanalysis. Defined as 'the art or process of deciphering coded messages without being told the key.' There are different methods and different results. It depends what you are looking for and ...


6

Take a look at words. It's a list of English words. Free to use, even for commercial purposes. The license can be found here. It begins: The collective work is Copyright 2000-2016 by Kevin Atkinson as well as any of the copyrights mentioned below:   Copyright 2000-2016 by Kevin Atkinson   Permission to use, copy, modify, distribute and sell these word lists,...


6

After doing a lot of (possibly not quite legal) digging, I think I've found the rough birth of the problem. The problem seems to have evolved in around 1940, from the M.I.T campus during World War II. The exact author appears to be unknown. An early use of the problem was in 1981 in Rick Billstein's 'A problem solving approach to mathematics for elementary ...


4

An un-enlightening brute force computer search yielded the following 5 solutions, excluding rotation, reflection, and inversion. Inspecting these solutions, it turns out that 1 and 9 are never adjacent. Thus, in addition to inverting 1-9, we can also shift them (i.e. 123...789 -> 234...891). After deduplicating shifts, it turns out there's only one "miracle ...


4

Mezzacotta (the successor to CiSRA) posted the 2007-2013 CiSRA puzzles on their site a couple days ago: https://www.mezzacotta.net/puzzle/cisra/


3

The Wayback Machine seems to work for other years -- here's the link to 2012, for instance. The site (including the archive of puzzles) seems to be completely usable to me through the Wayback Machine.


3

Web Sudoku has huge amounts of puzzles across five difficulty levels. You don't even have to wait a day for new ones.


2

Dcode has an engine for cracking "Keyboard shift" ciphers, which is a systematic shift of all intended letters along a particular keyboard layout. You can specify both language and keyboard layout as parameters. You can try it here: https://www.dcode.fr/keyboard-shift-cipher


2

In case you are looking for printable Sudoku puzzles and variations you can checkout www.FunWithPuzzles.com Sudoku Variations page is as given below http://www.funwithpuzzles.com/2017/02/sudoku-variations-index-page.html


2

I suggest By date published because that's the order he wrote them in, which makes the most sense to read them in, like a trilogy. His mind would develop new ideas with each book, and they are also a mind map. Raymond Smullyan publications


1

The search function on the NYTimes site helped with this, I couldn't find a full list only the short ones on the wiki page. (Same goes for other sites, they just cherry-pick the ones they like). https://query.nytimes.com/search/sitesearch/#/celebrity+crossword/since1851/allresults/1/allauthors/relevance/Crosswords%2FGames/


1

Believe it or not, there are two books of Diagramless Fill-Ins (I have both of them myself) that exist. You can purchase both of them on Amazon. https://www.amazon.com/Diagramless-Fill-Ins-I-Richard-Emmons/dp/0692319476/ref=sr_1_1?ie=UTF8&qid=1514566514&sr=8-1&keywords=diagramless+fill+in+puzzles https://www.amazon.com/Diagramless-Fill-Ins-2-...


1

Some Penny Press puzzle variety books have one or two of the diagramless fill-in puzzles. I also like them and have a hard time finding them. For the Penny Press puzzles, they have a list of words and only the e's are in the diagram. You have to determine the correct position from that.


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