What are collections?

Collections are a way for the community to curate groups of kata that can be trained on in a sequence. All collections are public. Eventually we will start to feature well crafted collections on other areas of the site.

How does this relate to bookmarks?

Bookmarking (starring) a kata is similar to collecting a kata, except that your bookmarks are kept private. They are also easily accessible via the top right bookmarks dropdown. If you intend to keep a list of kata you wish to work on later then bookmarks will serve you better.

Can I add to someone else's collection?

Only the warrior who created the collection can add to it. You are free to create your own collection with the same name. Kata are also searchable within the kata library by any collection name it is associated with. In this way you can easily find kata that span across multiple collections of the same name.

3250 Collections Found

Fav
9204 kyuliuzhenqi77XJTU
Interesting
5223 kyuRaegerALPHA Camp
Train
3128 kyuTuruk
Encryption
275 kyuruslankhhuchi.ru
Algorithm
2106 kyuruslankhhuchi.ru
Format
47226 kyujuansgaitanCodeBase
Filtering
49236 kyujuansgaitanCodeBase
Undo
6194 kyugladstoneBUPT
Current
6113 kyualexhexNone
every day we stray farther away from gods light
1184 kyuUnihedronUnary, Stack Exchange, Codefights
# todo
18204 kyurichkotzeFindmypast
String
12275 kyuBridgeTheGapKnowre
to do
10156 kyuHeronymousBotUFMG
Bloc
18277 kyuconcept-xBloc
5Kyu
284 kyudougvidottoFapesp - Fundação de Amparo a Pesquisa do Estado de São Paulo
Medium
7257 kyugtelljohannFullstack Academy
Easy
3227 kyugtelljohannFullstack Academy
Hard
297 kyugtelljohannFullstack Academy
Coleccion
2126 kyumaekosBonsai
Unsolved
7224 kyuBruceZoomShanghai Jiao Tong University
Beta
284 kyuAndrew-WeiShanghai Jiao Tong University
PHP Numbers
2206 kyuagainWAF2019
Problem
11235 kyuAltriasjYEast China Jiao Tong University
JS
7156 kyudunstontcTrueCoders
todo
18285 kyudunstontcTrueCoders
ToDo
215 kyuTMiddlehurstSparta Global
Theory
642 kyuTedStudleyCastlight Health
Good
288 kyustop1204HongKong
另类
4148 kyustop1204HongKong
D_C
4103 kyumihri
Again
4215 kyufayllkwUniversity of Michigan
TS
3176 kyuTheEagle
Try to optimize
8215 kyumarkus.benkoUFYgQXV0b21vdGl2ZQ
To Do
39264 kyuBridgeTheGapKnowre
Math and Number Patterns
3227 kyuJtrumanLaunch School
7 kyu
153297 kyuJtrumanLaunch School
8 kyu
269327 kyuJtrumanLaunch School
TODO
2185 kyujiesoul
Morse Code
3134 kyuggalihppMakers Institute
Da studiare
19255 kyuC_MinorAlten
To-do
284 kyuksharifbdField Nation
Esolang
8264 kyuBridgeTheGapKnowre
while
4117 kyurace872018
Math
7245 kyuBridgeTheGapKnowre
1
18246 kyuAndrewRiz
SQL
416 kyupsl24
Haskell
11227 kyuFuNn1esTZEAL
String Manipulations
2106 kyukasliwalrEvanescent Diagnostics Systems
TODO
6206 kyubirdmadEvl
Hmm
24234 kyuAnonGuyLoreto Coders
Compile time training and magic
415 kyuMototrollerMom's Spaghetti Bicycle-Based Technologies
katas I trained on
29245 kyuScottRudigerHack Reactor
asd
2104 kyusqula
GB
226 kyupete2002
lambda
2206 kyuboozeenure
proximas
9144 kyuosksanchBBVA
5 Kyu
10245 kyuscraggo
6 Kyu
2216 kyuscraggo
what
322 kyupoolsocksDevMountain
TO DO
26215 kyucopes83
function
3235 kyumasterdddchina
ToDo
277 kyujarek-pieprzakinfoShare Academy
Review
265 kyua1JazmynCUNY Queens College
Rounds to do
2187 kyuTylerJDev#100DaysOfCode
collection1
3175 kyuxadahiyaUdacity
try these
6164 kyuprsmithRanken Technical College
Very beginner - dojo
3157 kyukirinuxBNP Paribas
c
366 kyuyndyan
git six'in
8226 kyustefanomartinengoDevMountain
Yasashii
3197 kyuromerojpKalypso
todo
2185 kyusimonelp
SQL
25127 kyuAchilles11
Ruby for Beginners
5308 kyuMaikelNabilMikeNabil.net - Washington, DC
Regex Katas
1176 kyumD4ndr3London
Math
33256 kyujuansgaitanCodeBase
todo
366 kyuzawrat
Test Problems?
287 kyuprsmithRanken Technical College
Thinkful
17107 kyurezaafraUniversity of San Diego
Todo
8244 kyujpmc
Interesting JavaScript
5105 kyuN1nj@Frontend Masters
DO THESE
19266 kyustefanomartinengoDevMountain
TPI
42235 kyuLoganUEK
TODOs
10183 kyuJamezrin
Thinking, not coding
376 kyumarkus.benkoUFYgQXV0b21vdGl2ZQ
4 kyu
3224 kyusweetch001sweetch
5 kyu
3225 kyusweetch001sweetch
Primes
3235 kyumecvUTFPR
6 kyu
10255 kyusweetch001sweetch
to do
273 kyumrfracSIC Ugoria
CSI Code
3216 kyuNifledApprentice
collection
2226 kyusascha_pdxPortland State University
C# Level 8
268 kyucodytwintonTrueCoders
LOL
5194 kyupoltergeistN/A
Objects
637 kyumissKatiaPunterConstructor Labs
Algorithms
232 kyumetalimMemo OÜ
DO
8236 kyuMimonka
To do
494 kyuveosLublin University of Technology
want to try
6203 kyuTaranisGen'ei Ryodan
practive
16225 kyuchun waterwangyi game
For later
23233 kyuMaxpxtRebel Alliance
Python
4225 kyuipadsucker246 THPT GIA DINH
ToDo List
7133 kyuDehelFnac (A3IS - Bluesoft Group)
Finished
4136 kyuElsa7762University Of Colorado Boulder
6 kyu
10236 kyuJtrumanLaunch School
Math
5102 kyumetalimMemo OÜ
Beginner
8227 kyujohnkershawHOPE International School
Advanced Python
953 kyusuicInactive
Python Gems
4186 kyuQtechieQual
JavaScript
6146 kyuNicole-is-codingFreeCodeCamp
Interview JavaScript
25195 kyuN1nj@Frontend Masters
someTimeMaybe
2205 kyurammmukulThe Odin Project
TODO
233 kyuKelgorsMilky
Come back to
3196 kyuarswaw@LakeMichiganCollege
Laughlin Lunch & Learn
27285 kyuaclemensLaughlin Constable
Hack
322 kyumetalimMemo OÜ
bad_ass
2126 kyu10011Todama
Kata 6
216 kyuraj7071Finlogic Technologies india PVT. LTD.
js
284 kyucry101
7byu
12237 kyujohnkershawHOPE International School
C#
6253 kyuMaddiePComputershare
todo
296 kyuMc231QuasarTeam
PassNum-Promo4_3
5226 kyuJSpatimPassNum-Promo4
JS Practice
25254 kyucsjiangGrace Hopper 1610
python
4117 kyutruckfondueWorkday
RegExp
18167 kyudeweis
unsolved
365 kyubhprtkbhprtk
pending
284 kyunischalbcNovaders
yield
3225 kyudmivlge
Interview
7115 kyuKelgorsMilky
cq
10235 kyuiratusBLUETRADE
To-Do
25245 kyuManish-GiriScryNet
TODO
13203 kyuFalkorX
Interesting
595 kyuProtoGeneral Assembly
DDTraining w3
4237 kyuartemdwoDunelm Digital
Solve Later
19236 kyuBallislifeUni-Bremen
Math
4225 kyuKaterls3
Future
5245 kyuBinjaaaSelf
Numbers Challenge
3206 kyuchibu911ChibzStand
Pending Kata
2225 kyugzuzkstroEdgeSnatcher
JS
5225 kyuCodepeace
ToDo
2196 kyujpacsaiUdacity Scholarship
Puzzles
18103 kyudead-beefFree Code Camp
Adolf Hitlers Coding sweatshop
43264 kyuhakatomAdolf Hitler School for Friendship and Tolerance
Cryptography
544 kyudead-beefFree Code Camp
Games
5113 kyudead-beefFree Code Camp
Machine learning
344 kyudead-beefFree Code Camp
Types
1252 kyudead-beefFree Code Camp
Brainfuck
15264 kyudead-beefFree Code Camp
Interpreters
9263 kyudead-beefFree Code Camp
Strings
9166 kyudead-beefFree Code Camp
JavaScript lessons
1278 kyudodekjaFRI UNIZA
Go Problems
4224 kyuDoc-StrangePayU India
AI
493 kyuKaterls3
Retrain
884 kyurichkotzeFindmypast
python
5173 kyucanwe
Looky like a fun time
4151 kyuJamesAppleSorry, just me
Fundamentals
4137 kyulmcneelNRFUS
Lua
617 kyurlee27
Mcodes
6127 kyumkrv
to do
223 kyuAb4rdoPJATK
My Katas
2136 kyuIrbis691EPAM
Kata - 6
2156 kyuRT28MyPos Technologies
level-6
4225 kyujoelz
201801
4225 kyuNerdNeilsShanghaitech
Do later
7123 kyusev4BSUIR
JS later
8225 kyuKomar73Company
New
4125 kyulornayen
Closures
426 kyuGreenie10Findmypast
remove
268 kyunankewei中国(China)
revise
5155 kyuBozar
school
19235 kyumer_senseiWara
about time problems
264 kyusybilBeijing University of Posts and Telecommunications
To DO
463 kyule-du6Stelau Conseil
Tricky Kotlin
815 kyuice1000Gensokyo
To try
6145 kyumamafrantzThe Iron Yard
RegEx
42216 kyujuansgaitanCodeBase
cache
2225 kyudmivlge
DDTraining w2
4237 kyuartemdwoDunelm Digital
WMPARK
7225 kyuplainOldCodeKnowRe
Problem Kata's
6146 kyukevinsoni07Self Employed
ToDo
20254 kyuHugoHub
TODO
31156 kyuttvi-cse
To review
7217 kyuwominikinfoShare Academy
CBLeone
2205 kyuchrisb01Galvanize
JS
5177 kyuthismeng
6byu
356 kyujohnkershawHOPE International School
wyp
7214 kyuhhywypmetro
TODO
3104 kyuKrlos
ZR
6134 kyuTimKPINational Technical University of Ukraine 'Kyiv Polytechnic Institute'
TODO
863 kyuTimethor7th Fetzer Valve
kata need to work on
14224 kyuniceNickFullstack Academy 1710
interesting Kata
3164 kyuniceNickFullstack Academy 1710
luck
294 kyulxl1111A
01
294 kyuGillpft
6kyu
2226 kyuMaxXiongRPI
math
2224 kyuNerdNeilsShanghaitech
Excited
245 kyuNerdNeilsShanghaitech
Ruby Practice
594 kyusamdealyYale University
TODO
3103 kyunewsh
unfinished
12163 kyutheDarkBrightthe Dark Bright Studios
other
266 kyuYG777
Engineering
11163 kyusiebenschlaeferjambit GmbH
My Codes
3126 kyuMOYZ
2017-12-22
217 kyuchenxu10cornell univeristy
unsolved
6226 kyuchenxu10cornell univeristy
Revisit
12127 kyuswn78
Functional
116236 kyujuansgaitanCodeBase
Favorites
2124 kyuBuddha_BApp Academy
MyPython
2105 kyujeioncsUS
Slow
3225 kyuScottNicholsonKurlandGalvanize
Unlocked
4214 kyuzhictorykinhom
mathematic_and_number
394 kyuWangXin93Donghua University
DesignPattern
234 kyuJayabalan Tofalldigitalcreation
Smart
2106 kyuAhmed SaberITWORX
复习
2127 kyuhua03
代码可以优化
3225 kyuzhufreeWuhan University
Java Math
2146 kyuPeekAndPokePeekAndPoke
easy
4117 kyuraysuid
4 kyu
364 kyutrungleHolistics Software
Useful math
594 kyuRPSFullstack Academy
123
5215 kyushoopik
TODO
3176 kyudrub4n
NOT_DONE
5214 kyuasimov000matrix
JavaScript
4146 kyufreeman353Njtech
best katas
375 kyuKarolKarczewskiMoo-Tang Clan
Good ones
3134 kyuOshawkCodingNubs
Work On Later
7183 kyulouisriversWashington University in St. Louis
string etc
25296 kyulihuanshuai@douban
Return
3135 kyuivyo
8byu
11248 kyujohnkershawHOPE International School
ANDis
14245 kyuAkallabetANDigital
ToSolve
6234 kyuLuchanos11-5
TODO
438 kyuaddam7
TODO
2164 kyuSKoschnickeGFXpro
good
235 kyumif83
Review
7235 kyublaiseliuNIC, inc.
Todo
11195 kyujzelayetaSpredfast
To do
228 kyuwominikinfoShare Academy
math
2215 kyuTaranisGen'ei Ryodan
Functional
675 kyuLoganUEK
Recursivity
2128 kyurfkdaliSimplonco
tricky
4122 kyuroborourkeHuman Made
later
8106 kyuyumerov
294 kyuWWQ1993
Interesting and Fun
3206 kyudarkpoetccLiberty University IT Dev
unknown
286 kyuNeonLeexiangNanjing Univ of Sci & Tech
Python
275 kyuLoganUEK
Done
11237 kyuwominikinfoShare Academy
LuL
2104 kyuPeiniger
JS
2214 kyujuular
todo
11143 kyurenatomassaoFIAP
to-do
262 kyumorino_hikariFudan
Todo
3205 kyuLakhnois
Begginer
13248 kyujacekkuUEK
Interesting Kata
7132 kyuammo888University of Michigan
To-Do
24235 kyuse77enn
Functional Summer
11226 kyuhectcastroAzavea, Inc.
Katas 11.12
4266 kyuthebergamoNEOWarriors
Optimization
47236 kyujuansgaitanCodeBase
Looks fun
8132 kyuZeroZipZilchFreeCodeCamp
ToDo
2214 kyusumittA
1, 2, 3, 4, 5
12214 kyujuansgaitanCodeBase
java
12256 kyuduanshuaiminzonli
JS Review
2126 kyubuttsharkCarnegie Mellon University
numerial
17246 kyulihuanshuai@douban
TODO
2124 kyukoubanetespooNuance
weird
13226 kyuLeungEr
Future
333 kyuarswaw@LakeMichiganCollege
Array manipulation
5216 kyucmaher92Launch School
TO DO
6204 kyucesar-cbFIAP
cool
3164 kyurenatomassaoFIAP
my favourite
2124 kyusqsh86toutiao
js
13215 kyuJFkh
solution
2215 kyuxshi0001seu
Pending
3114 kyufgperianezNextail
Todo
4216 kyuGreenie10Findmypast
algorithm
3234 kyuedsolaterDongHua University
To Do List
6215 kyuJBoku8Boku
The Kata I can't solve it
3105 kyuEricwwwHangzhou Dianzi University
Algebra
2215 kyuoluwafemiAndela
Do it
2107 kyuvansanblchAsagirima
C++
2226 kyudataxerik
katas_later
148285 kyuafractalCoding Blocks
TODO
2205 kyudkup342
Task found by Roman
4104 kyulbvf50mobilepro.ruby team
Roman's tasks
4104 kyulbvf50mobilepro.ruby team
1
3116 kyutbone_in_tx
bugs
227 kyuShadno
Shell
2226 kyuNoisyMeadowBOC
Regex
2126 kyucmaher92Launch School
trierbo
3214 kyutrierboCSU
Interesting and well done
2216 kyubeeswaxNobody Knows ... the trouble i see ...
JavaScript
3216 kyulypchAMMIC
dpto
21226 kyuLoganUEK
sorting
245 kyumD4ndr3London
war
2137 kyutegarjgapMakers Institute
SI_4
4156 kyuV4stg
Sorting
11116 kyujuansgaitanCodeBase
Maths
7223 kyuVictorIrixIronhack
Translate in Ruby
274 kyulbvf50mobilepro.ruby team
Lesson practice
17327 kyuOmeizaAfrican Leadership University
Awesome Katas
253 kyuboyanderIronhack
Practice(night)
11178 kyuOmeizaAfrican Leadership University
PassNum-Promo4_2
5227 kyuJSpatimPassNum-Promo4
RoboScript
533 kyudonaldsebleungThe Hong Kong University of Science and Technology
Passerelle Numérique - Promo 4
7308 kyuJSpatimSimplonMars3, PassNum-Promo4
todo later
2134 kyut1meshiftOsoyan
RegExp
9117 kyuRenyxzAspiring Dev
Object
887 kyuRenyxzAspiring Dev
Array filtering
26157 kyuRenyxzAspiring Dev
sql
317 kyustefanomartinengoDevMountain
Alex 1ku
2141 kyulbvf50mobilepro.ruby team
Nato phonetic
256 kyulbvf50mobilepro.ruby team
8 kyu
50308 kyuDaryll
Wow!
244 kyucvbn127ICTIS SFEDU
Master Spark
42172 kyulolisaGensokyo
todo
4202 kyugelusoADISEA
practice
2115 kyublecl396Fullstack 1710
Pendings
5215 kyuFrBosquetRedradix
Javascript
10206 kyuMackers78Computershare
Week #9 selftest
667 kyujsio001ALPHA Camp
Week #9 JavaScript
5197 kyujsio001ALPHA Camp
Elixir
2186 kyujoamikAGH University
OO
216 kyubaiyexingzzZheJiang University
Primes
546 kyumD4ndr3London
todo_mer
5185 kyuDer PapaWara
Classes
246 kyumD4ndr3London
uncomplite
2155 kyukilowat2not have
Katas
6156 kyuSantiGC2damiesjm
Week2
5216 kyuHackett
katas
3205 kyujavigabeupm
Fix
275 kyuLesRamerRight Rez
first katas
6236 kyumblpzBigpoint
Interesting
12226 kyuantenorIstar
try
15184 kyucyloMircronManFullstack Academy
fun katas
18233 kyuzscheckOrigin Code Academy
train
8137 kyuproyko
Math
5225 kyupegasusroeNeverland
ToDo
272 kyuMagyartneocase
Montage
2103 kyuaaron.cClearlink
Javascript
7143 kyuMaddiePComputershare
SQL
514 kyuMaddiePComputershare
Wishlist
9142 kyubdupauEverest B.V.
primary
237 kyusaiful110816Govt. titumir college
Saved
4155 kyuJytanThe Firehose Project
JS Katas
2115 kyuxxnicklesStrayer
C# Katas
265 kyuxxnicklesStrayer
opasnost
6105 kyuusernamen7none
TODO
2205 kyusnrogers
Faves
3105 kyusregoIndependent Learner
Completed Katas
4187 kyutenorjasThe Iron Yard
Short tasks
296 kyumarkus.benkoUFYgQXV0b21vdGl2ZQ
Challenging
26224 kyu