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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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3 kyu
Hard Sudoku Solver
1,026Marx314
Algorithms
Games
Puzzles
Game Solvers
2 kyu
Hard Sudoku Solver
851f.rodrigues
Games
Algorithms
Game Solvers
Puzzles
3 kyu
Alphametics Solver
419docgunthrop
Puzzles
Performance
Cryptography
Algorithms
2 kyu
Insane Coloured Triangles
3,809Bubbler
Puzzles
Performance
Mathematics
2 kyu
Ludicrous Coloured Triangles
471rooflack
Puzzles
Mathematics
Algorithms
2 kyu
Full Metal Chemist #1: build me...
349Blind4Basics
Object-oriented Programming
Fundamentals
1 kyu
Square sums
581metalim
Algorithms
Mathematics
3 kyu
The Lift
3,338dinglemouse
Algorithms
Queues
Data Structures
1 kyu
Sliding Puzzle Solver
1,069docgunthrop
Puzzles
Genetic Algorithms
Game Solvers
Algorithms
4 kyu
Domino Tiling - 5 x 2N Board
57Bubbler
Puzzles
Mathematics
Logic
Dynamic Programming
3 kyu
Constructing finite fields using binary polynoms
156muesli4
Mathematics
Data Structures
Algebra
Strings
Algorithms
4 kyu
JSON Parser
202joebandenburg
JSON
Parsing
Algorithms
4 kyu
Egg Drops
96ecolban
Recursion
Dynamic Programming
Puzzles
3 kyu
The builder of things
1,003jhoffner
Metaprogramming
Domain Specific Languages
Algorithms
Language Features
4 kyu
Create the QR-Code
115zLuki
Mathematics
Algorithms
4 kyu
Connect Letters
67smiks
Algorithms
Dynamic Programming
Puzzles
1 kyu
Mine Sweeper
1,247myjinxin2015
Puzzles
Game Solvers
4 kyu
N queens puzzle (with one mandatory queen position)
296em-12
Algorithms
Combinatorics
Puzzles
1 kyu
Puzzle Fighter
173docgunthrop
Games
Logic
Game Solvers
Algorithms
3 kyu
Wrap a cube with paper nets
87doooom
Geometry
Puzzles
4 kyu
Repetitive Sequence - Easy Version
201G_kuldeep
Algorithms
Data Structures
4 kyu
String -> X-Iterations -> String
306Jomopipi
Algorithms
Puzzles
Mathematics
Language Features
4 kyu
Burrows-Wheeler-Transformation
1,920muesli4
Lists
Puzzles
Algorithms
4 kyu
Compile time #3 itoa (number to string)
118Mototroller
Metaprogramming
Strings
Algorithms
Fundamentals
3 kyu
Find the cheapest path
574FArekkusu
Algorithms
Performance
4 kyu
Born to be chained
1,180surtich
Functional Programming
2 kyu
15x15 Nonogram Solver
296Bubbler
Puzzles
Games
Performance
Game Solvers
1 kyu
Multisize Nonogram Solver
160Avanta
Algorithms
Logic
Games
Game Solvers
4 kyu
Esolang Interpreters #3 - Custom Paintf**k Interpreter
2,737donaldsebleung
Esoteric Languages
Interpreters
Algorithms
Tutorials
3 kyu
Alphabetic Anagrams
6,239Azuaron
Mathematics
Logic
Strings
Algorithms
4 kyu
Golf [Code Golf]
36Dr Gabo
Restricted
Algorithms
2 kyu
Whitespace Interpreter
1,105jacobb
Esoteric Languages
Interpreters
Algorithms
4 kyu
Hide a message in a deck of playing cards
253Zwyx
Cryptography
Mathematics
Games
Permutations
Algorithms
4 kyu
Don't give me five! Really!
447zappa78
Algorithms
Mathematics
Performance
2 kyu
Gerrymander Solver
308docgunthrop
Puzzles
Logic
Algorithms
4 kyu
5x5 Nonogram Solver
513Avanta
Algorithms
Logic
Games
Game Solvers
2 kyu
Change detection decorator
192zellerede
Decorator
Algorithms
Metaprogramming
2 kyu
Making squares with lines
18dramforever
Algorithms
Performance
Mathematics
Number Theory
3 kyu
No More 5's, Ever
64M1Miketro
Number Theory
Mathematics
Memoization