Very clever, kinda embarased considering how simple and elegand your solution is compared to mine

• Python new test framework should be used

• No sample tests

• More tests should be added

• The description should at least state the main point of the kata, instead of just writing it as comments in the initial solution which becomes troublesome for users to understand as not everyone will solve the problem using the same method

From the documentation:
https://www.postgresql.org/docs/9.6/arrays.html

This looks really clever. Where is this functionality documented?

SELECT matrix[j][s]

nope.

I rewrote the description to make the task understandable, that should solve the problem.

(I made the kata py3 compatible at the same time)

ok :)
thanks for the tip !

This one is for you, so... ;)

the real question is : who do you play with who couldn't tell you the rules ? :d

didn't read the notes, shame on me. While clicking "attempt" I thought "Oh, forgot to take care of 'en passant' !"
Would be nice to make a new kata with all the rules ;)
Anyway, good one, tks !

tip :
"and then empty arrays"

You should add bigger numbers in the tests, at least for python, since the naive approach can pass. Or remove "beware of big numbers" from the description.
Also, as stated by others, the description is not consistent about the sum asked for.

Just make things clearer, will be a perfect kata.

no, we shouldn't
thanks for noticing the small attribute :p

Little typo :

getting started #let's p i ay

. . . should we also fix the title ?

; ) )

To my opinion, it is useless. You can hard coding only if you got the answer, and there's no huge chance to just guess it.
But I hoped you enjoyed coding the random cases :p. Anyway, that's still an added feature, doesn't hurt.
Thanks to all for helping getting through beta.