APL Problem Solving Competition

The 15th annual International APL Problem Solving Competition is now live

Participate now

Dyalog Ltd is pleased to host the APL Problem Solving Competition. The challenge has two phases:

  • Phase I consists of ten simple problems that must all be solved.
  • Phase II consists of more complex problem sets that do not all have to be solved.

We encourage students at all levels of education, anywhere in the world, to participate. Non-students are welcome to submit solutions and may receive an honourable mention, but proof of enrolment in a full-time educational program is required to win a cash prize.

Thanks to our sponsors SimCorp and InvestCloud, substantial cash prizes are offered. In addition, the winner is invited to the next Dyalog user meeting to present their winning work.

The 2023 APL Problem Solving Competition

Important Dates

Friday 28 July – deadline for submissions (23:59 UTC)

Monday 21 August – winners announced


Phase II – Grand prize winner

receives a cash prize of $2,500 USD, and an invitation to present their winning work at Dyalog '23 in Elsinore, Denmark

Phase II – second place

receives a cash prize of $1,250 USD

Phase II – third place

receives a cash prize of $750 USD

Phase II – Winning Professional Entrant

receives a delegate package registration for Dyalog '23 in Elsinore, Denmark

Phase II participation awards (randomly selected from all entries that include a correct solution to any problem)

each receive a cash prize of $200 USD (5 awarded)

Phase I winners (selected based on most accurate/well-written submissions)

each receive a cash prize of $100 USD (10 awarded)

Previous Years

Details of the problems set in previous years (and the appropriate workspaces to help solve them) can be downloaded from the table below; this table also includes information on the main prize winners for each year. Phase I questions from 2013 onwards are also available online, with automatic solution validation.

Our blog includes posts relating to some of the problems set in previous years, with pointers on how they might be solved.

Weekly APL Quest chat sessions (with subsequent videos and demo code) investigate past Phase I questions.

YearTasksMaterialsWinnersWinners' PresentationsAPL Quest
2022 -
2021 - -
2020 -
2012 - n/a
2011 n/a
2010 n/a
2009 n/a n/a