Kata Library
Sign Up
Time to claim your honor
Training
Practice
Complete challenging
Kata
to earn honor and ranks. Re-train to hone technique
Freestyle Sparring
Take turns remixing and refactoring others code through
Kumite
Community
Leaderboards
Achieve honor and move up the global leaderboards
Chat
Join our
Discord
server and chat with your fellow code warriors
Discussions
View our
Github Discussions
board to discuss general Codewars topics
About
Docs
Learn about all of the different aspects of Codewars
Blog
Read the latest news from Codewars and the community
Log In
Sign Up
Library
Collections
Newest
Oldest
Popularity
Positive Feedback
Most Completed
Least Completed
Hardest
Easiest
Name
Relevance
Low Satisfaction
All
My Languages
Agda (Beta)
BF (Beta)
C
CFML (Beta)
Clojure
COBOL (Beta)
CoffeeScript
CommonLisp (Beta)
Coq
C++
Crystal
C#
D (Beta)
Dart
Elixir
Elm (Beta)
Erlang (Beta)
Factor (Beta)
Forth (Beta)
Fortran (Beta)
F#
Go
Groovy
Haskell
Haxe (Beta)
Idris (Beta)
Java
JavaScript
Julia (Beta)
Kotlin
λ Calculus (Beta)
Lean
Lua
NASM
Nim (Beta)
Objective-C (Beta)
OCaml (Beta)
Pascal (Beta)
Perl (Beta)
PHP
PowerShell (Beta)
Prolog (Beta)
PureScript (Beta)
Python
R (Beta)
Racket
Raku (Beta)
Reason (Beta)
RISC-V (Beta)
Ruby
Rust
Scala
Shell
Solidity (Beta)
SQL
Swift
TypeScript
VB (Beta)
Approved & Beta
Approved
Beta
All
Kata I have not trained on
Kata I have not completed
Kata I have completed
8 kyu
easiest
7 kyu
6 kyu
5 kyu
4 kyu
3 kyu
2 kyu
1 kyu
hardest
Algorithms
1
Concurrency
8
Debugging
2
Fundamentals
2
Language Features
1
Threads
1
FEATURED TAGS
Cryptography
Data Science
Debugging
Games
Tutorials
8 Kata Found
6 kyu
Merging Two Channels
140
BattleRattle
Concurrency
5 kyu
Concurrent task execution
137
hobovsky
2 Issues Reported
Concurrency
Fundamentals
Beta
Concurrent Primes Generator
14
ahmadSaeedGoda
Status:
Testing & feedback needed
Estimated Rank:
4 kyu
Debugging
Concurrency
Beta
Concurrent Calc - Synchronization Primitives
11
ahmadSaeedGoda
Status:
Testing & feedback needed
Estimated Rank:
4 kyu
Concurrency
6 kyu
Merging N Channels
195
BattleRattle
Concurrency
Language Features
Beta
Mr. Graciani shops
3
jariazavalverde
Status:
Testing & feedback needed
Estimated Rank:
3 kyu
Concurrency
Algorithms
6 kyu
Dude, my computer cannot count!
456
mattes
Concurrency
Debugging
Beta
Deadlock Detection
19
moonfly
5 Issues Reported
Status:
Waiting for issues to be resolved
Estimated Rank:
5 kyu
Threads
Concurrency
Fundamentals
Confirm
Collect:
undefined
Loading collection data...