### Random Post

### Recent Posts

### Archives

### Categories

- article (11)
- enigma (1,183)
- misc (2)
- project euler (2)
- puzzle (46)
- site news (46)
- tantalizer (49)
- teaser (3)

### Site Stats

- 184,820 hits

Advertisements

Programming Enigma Puzzles

31 December 2016

Posted by on There are now 1,028 *Enigma* puzzles on the site (plus a few other puzzles). There is a complete archive of all puzzle published from January 1979 to September 1986 and also from May 2001 to December 2013, which is about 57.5% of all *Enigma* puzzle published in *New Scientist* and leaves around 760 puzzles to add to the site.

In 2016 I added 105 *Enigma* puzzles to the site (as well as a puzzles from other sources). Here’s my selection of the ones I found most interesting to solve this year:

**Enigma 329: Clear short circuit****Enigma 343: In the mews****Enigma 344: Five-nations championship****Enigma 359: Neat odd quad****Enigma 362: On the face of it****Enigma 373: Date the painting**

**Enigma 1182: Recurring decimals****Enigma 1174: Small sums****Enigma 1172: Plant a tree****Enigma 1154: Funny money****Enigma 1152: Tet on the Nile****Enigma 1147: Multiply and add****Enigma 1146: Units fore and aft****Enigma 1143: Count and count****Enigma 1137: On, off, on, off**

I have continued to maintain the **enigma.py** library (in particular I added some routines to help in solving football problems with letters substituted for digits in score tables, and for solving general *Alphametic* problems). I wrote up some notes on the solving of *Alphametics* using *Python* here and here, and the `SubstitutedExpression()` class in **enigma.py** can now be used to solve many *Enigma* problems directly.

Since switching to posting puzzles on Monday and Friday I have also added Wednesday *Bonus* Puzzles, which are posted on Wednesdays (naturally), if I have the time. Unless there is a particularly interesting puzzle that’s caught my eye that week I will alternate posting *Tantalizer* (set by Martin Hollis) and *Puzzle* (set by Eric Emmet) problems, which are the predecessors of the *Enigma* puzzles in **New Scientist**. (Although Eric Emmet seems to like puzzles involving substituted addition or division sums, and football problems a bit too much for my liking).

Thanks to everyone who has contributed to the site in 2016, either by adding their own solutions (programmatic or analytical), insights or questions, or by helping me source puzzles from back-issues of *New Scientist*.

Advertisements

%d bloggers like this:

## Recent Comments