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Start training on this collection. Each time you skip or complete a kata you will be taken to the next kata in the series. Once you cycle through the items in the collection you will revert back to your normal training routine.

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1 kyu
BECOME IMMORTAL
2,876Voile
Puzzles
Dynamic Programming
Performance
Algorithms
5 kyu
How many Wagons Are in the Train?
112sgerodes
Algorithms
Puzzles
Lists
Linked Lists
5 kyu
One Line Task: The Special Downward Step
18Bubbler
Puzzles
Mathematics
Restricted
Beta
Implement Classes by using Functions
24NightyNight
Status:Waiting for issues to be resolved
Estimated Rank:
3 kyu
Metaprogramming
Puzzles
Beta
Advanced Typescript Types 1: Range of numbers
8RoryStokes
Status:Testing & feedback needed
Estimated Rank:
2 kyu
Puzzles
Beta
BigArray
4OpenByte
Status:Testing & feedback needed
Estimated Rank:
4 kyu
Puzzles
Arrays
4 kyu
Numbers with Collatz Starting Patterns
59Bubbler
Algorithms
Puzzles
Mathematics
Beta
Broken Keyboard
13Aharon Sambol
Status:Awaiting approval
Estimated Rank:
5 kyu
Puzzles
Logic
Fundamentals
6 kyu
Radix Tree
215suic
Data Structures
Algorithms
3 kyu
Breaking the Vigenère Cipher
341petermaier1
Ciphers
Cryptography
Algorithms
Draft
Does the path cross itself?
21user6800471
Status:Draft
Estimated Rank:
5 kyu
Fundamentals
Arrays
Algorithms
Performance
Beta
Challenge Fun #21: Length Of Original Sticks
6myjinxin2015
Status:Testing & feedback needed
Estimated Rank:
6 kyu
Algorithms
Performance
Beta
Reach 1 as Quick as Possible
14cemsina
Status:Testing & feedback needed
Estimated Rank:
3 kyu
Algorithms
Performance
Fundamentals
6 kyu
Maximum Depth of Nested Brackets
502nachoMonllor
Strings
Performance
Algorithms
4 kyu
Big Big Big Padovan Number
417Valek
Performance
Algorithms
Big Integers
Beta
Python Recipes #2 : Finalize
10G_kuldeep
Status:Testing & feedback needed
Metaprogramming
Fundamentals
2 kyu
Tail Call Optimization
135ZED.CWT
Puzzles
Games
Metaprogramming
Beta
BF Creator: Is a > b?
12ozichukwu
Status:Ranking feedback needed
Estimated Rank:
6 kyu
Fundamentals
5 kyu
Haskell List Dot Notation
462surtich
Functional Programming
Arrays
Algorithms
4 kyu
Functional streams
724muesli4
Streams
Functional Programming
Algorithms
4 kyu
ES5 Generators(i)
1,077surtich
Functional Programming
Fundamentals
4 kyu
Set Closure Generator
74ecolban
Streams
Algorithms
4 kyu
Fastest Code : Half it IV
70myjinxin2015
Puzzles
Games
Algorithms
Beta
Increment a variable ...
4mauro-1
Status:Testing & feedback needed
Estimated Rank:
2 kyu
Esoteric Languages
Algorithms
Fundamentals
Beta
Finding a Circulation
5ALowVerus
Status:Testing & feedback needed
Estimated Rank:
4 kyu
Networks
Algorithms
Graph Theory
4 kyu
Egg Drops
94ecolban
Recursion
Dynamic Programming
Puzzles
4 kyu
Golf [Code Golf]
35Dr Gabo
Restricted
Algorithms
2 kyu
Change detection decorator
185zellerede
Decorator
Algorithms
Metaprogramming
Beta
One-Semicolon Stream Zipping
12phantamanta44
Status:Waiting for issues to be resolved
Estimated Rank:
2 kyu
Algorithms
Streams
Puzzles
5 kyu
One-Semicolon Fibonacci Stream
140phantamanta44
Algorithms
Streams
Puzzles
4 kyu
Hypercube Lists
66Wintro
Algorithms
Lists
Recursion
Retired
Slow Looping (retired)
46Pamblam
Status:Retired
Estimated Rank:
4 kyu
Recursion
Promises
Asynchronous
Arrays
Fundamentals
Beta
Match Nested HTML Snippet
57safiir
Status:Testing & feedback needed
Estimated Rank:
5 kyu
Regular Expressions
Fundamentals
5 kyu
Fix this
29JohanWiltink
Refactoring
Recursion
4 kyu
Smallest possible sum
6,708dkhaburdzania
Algorithms
Mathematics
Arrays
4 kyu
How many numbers III?
3,736raulbc777
Fundamentals
Data Structures
Algorithms
Mathematics
Logic
Beta
NightmareScript#7 Binary to Hexadecimal Conversion
12Simple Rick
Status:Ranking feedback needed
Restricted
Performance
6 kyu
[Code Golf] Painted Pyramid Probability Puzzle
52benjaminzwhite
Puzzles
Mathematics
Restricted
Probability
Beta
[Code Golf] NightmareScript #2 (Stringy Strings)
27Simple Rick
Status:Awaiting approval
Restricted
Strings
Algorithms
Beta
Type-level TypeScript: Array.prototype.map
17kelsny
Status:Testing & feedback needed
Estimated Rank:
7 kyu
Language Features
2 kyu
Can you control the lights?
36lil2
Algorithms
Puzzles
Performance
4 kyu
Counterfeiting
592benzrf
Metaprogramming
Puzzles
6 kyu
Java Code Golf: Large Factorials
138Unihedron
Games
Restricted
Puzzles
4 kyu
Superheroes Convention #1 Pandemic
112Donvito-911
Algorithms
Puzzles
Performance
Graph Theory
6 kyu
Effective Resistance of a Simple Circuit
80myst-6
Recursion
Arrays
Algorithms
Fundamentals
Physics
Beta
Cycles for permutations
15IttayWeiss
Status:Awaiting approval
Estimated Rank:
6 kyu
Mathematics
Permutations
Beta
Is it a Tree?
14OliverGalt
Status:Waiting for issues to be resolved
Estimated Rank:
3 kyu
Algorithms
Graph Theory
6 kyu
Macromanage your code
50trashy_incel
Macros
Refactoring
4 kyu
Lambda term reduction
57hhelwich
Mathematics
Logic
Functional Programming
Algorithms
Trees
1 kyu
Game of Life in Reverse
44lsnbr
Algorithms
Cellular Automata
2 kyu
Hard Sudoku Solver
815f.rodrigues
Games
Algorithms
Game Solvers
Puzzles
2 kyu
Wumpus world
80FArekkusu
Artificial Intelligence
Algorithms
Game Solvers
2 kyu
Full Metal Chemist #1: build me...
330Blind4Basics
Object-oriented Programming
Fundamentals
2 kyu
Naive subarray
80ice1000
Fundamentals
Algorithms
Data Structures
Number Theory
Performance
5 kyu
Trees to Parentheses, and Back
117oisdk
Trees
Fundamentals
6 kyu
Millipede of words
840RealSup
Algorithms
Arrays
Strings
7 kyu
Summation Triangle #1
701groskowski
Mathematics
Performance
3 kyu
Totally Good Permutations
39benjaminzwhite
Algorithms
Mathematics
Combinatorics
Discrete Mathematics
Strings
Set Theory
Number Theory
3 kyu
Blobservation
368docgunthrop
Logic
Games
Object-oriented Programming
Performance
Algorithms
6 kyu
Laser in a square room
107groskowski
Mathematics
Geometry
Performance
5 kyu
Happy New Year, 2018 !!
32ZahNarztiK
Puzzles
Restricted
5 kyu
Bananas
903dinglemouse
Strings
Algorithms
6 kyu
Chess Aesthetics
90sgerodes
Algorithms
Strings
4 kyu
Elemental Words
807dcsmith
Strings
Algorithms
Recursion
Arrays
2 kyu
Regular Expression - Check if divisible by 0b111 (7)
2,095Hacker Sakana
Puzzles
Regular Expressions
Strings
Algorithms
Beta
How many elemental forms?
18mauro-1
Status:Awaiting approval
Estimated Rank:
6 kyu
Strings
Performance
Algorithms
6 kyu
Levels of Pascal's Pyramid
86kylito
Arrays
Algorithms
Mathematics
Combinatorics
Recursion
5 kyu
Efficient Power Modulo n
1,105osuushi
Mathematics
Algorithms
Performance
4 kyu
Evil genius game - Find the moving chess piece while blindfolded
55benjaminzwhite
Algorithms
Mathematics
Combinatorics
Performance
5 kyu
Compression : impossible
100PaulBlanche
Mathematics
Puzzles
4 kyu
Don't give me five! Really!
423zappa78
Algorithms
Mathematics
Performance
5 kyu
Pyramide d'Azkee
86dfhwze
Algorithms
Puzzles
ASCII Art
Strings
Geometry
3 kyu
Sega Games: Streets of Rage
13dfhwze
Algorithms
Games
Logic
Mathematics
Performance
Data Structures
5 kyu
Find Out the Number of Gold Coins!
65davimoreno
Mathematics
Number Theory