Kata
Sign Up
Kata
Kumite
Forum
Wiki
Leaders
Log In
Sign Up
Library
Collections
Sort by:
Newest
Oldest
Popularity
Positive Feedback
Most Completed
Least Completed
Recently Published
Hardest
Easiest
Name
Language:
All
My Languages
Agda (Beta)
BF (Beta)
C
Clojure
CoffeeScript
Coq (Beta)
C++
Crystal
C#
Dart
Elixir
Elm (Beta)
Erlang (Beta)
Factor (Beta)
Forth (Beta)
Fortran (Beta)
F#
Go
Groovy (Beta)
Haskell
Idris (Beta)
Java
JavaScript
Julia (Beta)
Kotlin (Beta)
Lua (Beta)
NASM (Beta)
Nim (Beta)
Objective-C (Beta)
OCaml (Beta)
PHP
PowerShell (Beta)
PureScript (Beta)
Python
R (Beta)
Racket (Beta)
Reason (Beta)
Ruby
Rust
Scala (Beta)
Shell
Solidity (Beta)
SQL
Swift
TypeScript
VB (Beta)
Status:
Approved & Beta
Approved
Beta
Progress:
All
Kata I have not trained on
Kata I have not completed
Kata I have completed
Difficulty:
8 kyu
8 kyu
7 kyu
7 kyu
6 kyu
6 kyu
5 kyu
5 kyu
4 kyu
4 kyu
3 kyu
3 kyu
2 kyu
2 kyu
1 kyu
1 kyu
Tags:
Fundamentals (4002)
Algorithms (2956)
Data Types (2424)
Logic (2147)
Numbers (1273)
Strings (1167)
Puzzles (1157)
Arrays (1011)
Games (977)
Mathematics (969)
Basic Language Features (838)
Programming Paradigms (791)
Data Structures (567)
Control Flow (551)
Declarative Programming (488)
Advanced Language Features (345)
Regular Expressions (263)
Object-oriented Programming (242)
Functions (210)
Lists (208)
Functional Programming (173)
Arithmetic (170)
Loops (167)
Objects (141)
Bugs (131)
Data (126)
Algebra (125)
Theoretical Computer Science (114)
Security (111)
Performance (110)
Sorting (105)
Parsing (103)
Computability Theory (100)
Recursion (100)
Binary (95)
Classes (95)
Integers (93)
Optimization (91)
Utilities (86)
Cryptography (85)
Geometry (85)
Databases (83)
Information Systems (83)
SQL (81)
Graphs (79)
Dates/Time (73)
Sequences (64)
Design Principles (61)
Design Patterns (59)
Formatting (51)
2423 Kata Found
7 kyu
Thinking & Testing : Something capitalized
16
16
7
87%
of
143
566
myjinxin2015
2 Issues Reported
Puzzles
Games
6 kyu
Schrödinger's Boolean
67
67
16
87%
of
199
825
docgunthrop
Puzzles
6 kyu
Vasya - Clerk
1779
1779
257
86%
of
4,214
28,141
AlexIsHappy
3 Issues Reported
Fundamentals
Mathematics
Algorithms
Numbers
Games
7 kyu
Sort by Last Char
50
50
11
90%
of
364
1,897
A.Partridge
Fundamentals
Strings
Arrays
Functions
Control Flow
Basic Language Features
8 kyu
Count the Monkeys!
197
197
70
89%
of
2,410
21,416
A.Partridge
1 Issue Reported
Algorithms
Arrays
Fundamentals
Ranges
Basic Language Features
Lists
Data Structures
8 kyu
The 'if' function
119
119
31
70%
of
879
9,037
user578387
3 Issues Reported
Fundamentals
Functional Programming
Declarative Programming
Higher-order Functions
Functions
Control Flow
Basic Language Features
6 kyu
Vowels Back
32
32
6
84%
of
110
433
A.Partridge
1 Issue Reported
Algorithms
Fundamentals
Strings
Arrays
Loops
Control Flow
Basic Language Features
7 kyu
Sum of odd numbers
966
966
169
84%
of
5,323
38,272
hhelwich
Fundamentals
Arrays
Lists
Data Structures
Numbers
Arithmetic
Mathematics
Algorithms
7 kyu
Thinking & Testing : Uniq or not Uniq
32
32
8
91%
of
251
993
myjinxin2015
2 Issues Reported
Puzzles
Games
6 kyu
Taylor Series
6
6
3
88%
of
12
26
Paul Robertson
Fundamentals
Mathematics
Algorithms
Numbers
Lists
Data Structures
3 kyu
Alphametics Solver
120
120
28
94%
of
25
97
docgunthrop
Algorithms
Puzzles
Games
Performance
Optimization
Cryptography
Security
7 kyu
Thinking & Testing: A and B?
75
75
24
76%
of
351
1,737
myjinxin2015
Puzzles
Games
5 kyu
Blackjack Scorer
60
60
11
91%
of
171
1,211
jodymgustafson
Algorithms
Rules
Games
7 kyu
The wheat/rice and chessboard problem
49
49
10
92%
of
266
1,216
GiacomoSorbi
Puzzles
Mathematics
Algorithms
Numbers
Bitwise Operators
Bits
Operators
Advanced Language Features
Binary
Fundamentals
Recursion
Computability Theory
Theoretical Computer Science
8 kyu
Regexp Basics - is it a digit?
107
107
41
85%
of
774
5,529
taw
5 Issues Reported
Fundamentals
Regular Expressions
Declarative Programming
Advanced Language Features
Strings
5 kyu
Josephus Survivor
383
383
81
90%
of
621
4,456
GiacomoSorbi
Algorithms
Mathematics
Numbers
Lists
Data Structures
Arrays
6 kyu
The Supermarket Queue
1626
1626
347
93%
of
2,566
14,217
mattlub
Fundamentals
Arrays
Loops
Control Flow
Basic Language Features
6 kyu
Tetris Series #2 — Primitive Gameplay
10
10
1
95%
of
20
50
Etoneja
Fundamentals
Games
Algorithms
Basic Language Features
Loops
Control Flow
Arrays
5 kyu
Iterative Rotation Cipher
77
77
32
95%
of
63
209
docgunthrop
Algorithms
Strings
Ciphers
Cryptography
Security
Encryption
5 kyu
Is my friend cheating?
853
853
148
88%
of
1,066
6,602
g964
Puzzles
Fundamentals
Numbers
Mathematics
Algorithms
5 kyu
Dots and Boxes Validator
42
42
14
100%
of
32
122
docgunthrop
Algorithms
Games
7 kyu
Remove anchor from URL
97
97
30
85%
of
983
10,033
jhoffner
1 Issue Reported
Fundamentals
Regular Expressions
Declarative Programming
Advanced Language Features
Strings
6 kyu
Build a pile of Cubes
1210
1210
147
85%
of
4,722
32,908
g964
1 Issue Reported
Fundamentals
Optimization
6 kyu
Create Phone Number
619
619
186
82%
of
6,219
56,090
xDranik
Algorithms
Arrays
Strings
Loops
Control Flow
Basic Language Features
Fundamentals
Formatting
Regular Expressions
Declarative Programming
Advanced Language Features
5 kyu
Master your primes: sieve with memoization
26
26
12
82%
of
25
69
GiacomoSorbi
1 Issue Reported
Algorithms
Memoization
Design Patterns
Design Principles
Optimization
8 kyu
Yield to the Block
28
28
3
89%
of
95
2,461
agram
1 Issue Reported
Fundamentals
Blocks
Object-oriented Programming
Functions
Control Flow
Basic Language Features
Functional Programming
Declarative Programming
Higher-order Functions
5 kyu
Integers: Recreation One
914
914
163
88%
of
1,545
9,920
g964
Fundamentals
Algorithms
Optimization
6 kyu
Playing on a chessboard
297
297
40
85%
of
454
2,359
g964
Fundamentals
Puzzles
Games
5 kyu
Range of Integers in an Unsorted String
78
78
18
92%
of
50
168
docgunthrop
Puzzles
Algorithms
Numbers
6 kyu
Socialist distribution
33
33
5
93%
of
69
235
GiacomoSorbi
Algorithms
Arrays
Lists
Data Structures
Statistics
Data
Loading...
Confirm