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
4
Angular
1
Arrays
1
Date Time
1
Debugging
2
Decorator
1
Design Patterns
32
Event Handling
2
Fundamentals
25
Game Solvers
1
Games
3
Geometry
2
Graph Theory
1
Graphics
1
Language Features
1
Lists
1
Mathematics
2
Object-oriented Programming
9
Puzzles
1
Refactoring
1
Regular Expressions
1
Singleton
1
Sorting
2
Strings
1
FEATURED TAGS
Cryptography
Data Science
Debugging
Games
Tutorials
32 Kata Found
5 kyu
Snakes and Ladders
7,374
adrian.eyre
Design Patterns
Games
Fundamentals
6 kyu
PatternCraft - State
4,627
brunolm
1 Issue Reported
Design Patterns
Fundamentals
7 kyu
PatternCraft - Visitor
4,743
brunolm
4 Issues Reported
Design Patterns
Fundamentals
6 kyu
PatternCraft - Strategy
4,685
brunolm
Design Patterns
Fundamentals
6 kyu
PatternCraft - Decorator
4,379
brunolm
Design Patterns
Fundamentals
Beta
Strategy Pattern - Bird Behaviors
74
Klypyon
2 Issues Reported
Status:
Testing & feedback needed
Estimated Rank:
6 kyu
Design Patterns
Fundamentals
5 kyu
The Social Network
81
user4850992
Algorithms
Design Patterns
Fundamentals
Graph Theory
5 kyu
Event & Delegate
331
aryan-firouzian
2 Issues Reported
Design Patterns
Object-oriented Programming
Fundamentals
5 kyu
Simple Events
6,030
akoptsov
2 Issues Reported
Design Patterns
Event Handling
Fundamentals
5 kyu
Singleton Adam & Eve
405
FrankK
Design Patterns
Singleton
Fundamentals
6 kyu
Cafeteria
461
arkada38
Design Patterns
Fundamentals
4 kyu
Sortable Poker Hands
495
FrankK
5 Issues Reported
Games
Fundamentals
Sorting
Design Patterns
Algorithms
7 kyu
Adapter Pattern - Geese to Ducks
593
Klypyon
1 Issue Reported
Design Patterns
Fundamentals
6 kyu
Sortable Shapes
2,862
FrankK
4 Issues Reported
Sorting
Fundamentals
Mathematics
Design Patterns
Arrays
Geometry
7 kyu
PatternCraft - Adapter
4,463
brunolm
2 Issues Reported
Design Patterns
Fundamentals
6 kyu
Timer Decorator
831
filipkonieczny
3 Issues Reported
Fundamentals
Design Patterns
Object-oriented Programming
Date Time
Beta
Advanced cow farm
8
vldnvsk
Status:
Testing & feedback needed
Estimated Rank:
5 kyu
Graphics
Algorithms
Design Patterns
Fundamentals
Lists
6 kyu
Expected Type Decorator
512
filipkonieczny
Fundamentals
Design Patterns
Object-oriented Programming
4 kyu
Generalisations
14
Kacarott
Design Patterns
6 kyu
Simple Counter
29
Kacarott
Puzzles
Design Patterns
5 kyu
Readable Specification Pattern
84
FArekkusu
Fundamentals
Object-oriented Programming
Design Patterns
6 kyu
Serializing an Enum
25
xavierguihot
Fundamentals
Design Patterns
7 kyu
Lombok Builder.
433
Javatlacati
Object-oriented Programming
Design Patterns
Refactoring
6 kyu
RPS Knockout Tournament Winner
254
FrankK
Games
Algorithms
Game Solvers
Design Patterns
Object-oriented Programming
6 kyu
Detect my Konami code!
104
Voile
Fundamentals
Strings
Design Patterns
5 kyu
Rotations and reflections I
231
geoffp
Object-oriented Programming
Design Patterns
Geometry
Mathematics
Fundamentals
6 kyu
Well, that's just (proto)typical! The Misadventures of Bob the Highly Paid Consultant #3
185
PMV
Debugging
Design Patterns
Fundamentals
6 kyu
This isn't what you think! The Misadventures of Bob the Highly Paid Consultant #2
175
PMV
Language Features
Design Patterns
Debugging
5 kyu
Using closures to share class state
8,912
jhamon
2 Issues Reported
Design Patterns
Fundamentals
5 kyu
Decorator Pattern
455
surtich
3 Issues Reported
Design Patterns
Decorator
Object-oriented Programming
Fundamentals
Loading...
Confirm
Collect:
undefined
Loading collection data...