Tracking: Missing exercises from problem specifications

[mk-mxp]

Directly from configlet info (updated 2026-07-11).

There are 30 non-deprecated exercises in exercism/problem-specifications that are both unimplemented and not in the track config exercises.foregone array:

With canonical data:

• camicia
• complex-numbers
• custom-set
• dominoes
• dot-dsl
• forth
• go-counting
• grep
• intergalactic-transmission
• ledger
• piecing-it-together
• pov
• pythagorean-triplet
• rational-numbers
• react
• rectangles
• relative-distance
• rest-api
• satellite
• save-the-cow
• sgf-parsing
• simple-linked-list
• split-second-stopwatch
• tree-building
• word-search
• zipper

Without canonical data:

• error-handling
• lens-person
• paasio

[neenjaw]

I suggest to add these to the forgone exercises:

• the unimplemented sing-song exercises like bottle-song
• math-centric exercises like complex-numbers, rational-numbers, Pythagorean-triplet, square-root -- these are niche topics which exclude a lot of users if you aren't already familiar with these math concepts.
• rest-api -- very old exercise, poorly defined
• zipper -- doesn't make very much sense in a non-functional language.

[tomasnorre]

Wauw, I didn't expect it to be this many exercises missing, then there is still work to do :) I Only had the list from #48in24 in mind.

Would it be possible to add a priority to them? High, Medium, Low would be enough I think.

[mk-mxp]

Would it be possible to add a priority to them? High, Medium, Low would be enough I think.

I'm too busy to look at them in more detail at the moment. But that was my plan. And also mark those as foregone that cannot or should not be implemented.

[tomasnorre]

I have added a PR for

• Add ISBN Verifier Exercise #641
• Add Sublist Exercise #642
• Add Strain Exercise #643
• Add House Exercise #647
• Add Killer Sudoku Helper Exercise #648
• Add Micro Blog Exercise #649
• Add State of Tic-Tac-Toe Exercise #651

[resu-xuniL]

I have added a PR for

• Add Bottle song exercice #1001
• Add Swift scheduling exercice #1003
• Add baffling-birthdays exercice #1004
• Add saddle-points exercice #1006
• Add game-of-life exercice #1007
• Add square-root exercice #1011

PS: I left the difficulty at 1 for all of these.

[mk-mxp]

Please be aware: The list in the issue description is not very up-to-date. New exercises have been defined, some are renamed, some have canonical data now. Run configlet info for up-to-date information.