The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 6 days. Why not try and solve them ahead of time?
Farey Sequence in Python in chars. Achievements Cheevos Holes Languages Medals Miscellaneous All Holes 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Multitap Input Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 ArkScript Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig 05AB1E APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> ALGOL 68 ArkScript Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig Experimental Language 05AB1E APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Hole All 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Multitap Input Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Chars Time Submitted 161st Vaekor 460 126 12ms 28 Feb 2024 162nd denkyuu1 457 127 20ms 7 Feb 2026 163rd 4ndyJ 🇬🇧 453 128 12ms 29 Feb 2024 164th CutSandstone 450 129 11ms 19 Jul 2024 164th wh3n3v3r 🇨🇿 450 129 24ms 18 Nov 2024 164th Andrey2001 450 129 19ms 1 Feb 2026 164th tomh1012 450 129 14ms 19 Feb 2026 168th addmai 446 130 20ms 30 Jul 2025 169th bjornmartensson 443 131 80ms 11 Dec 2023 169th Mabeloid 🇳🇴 443 131 20ms 11 Sep 2024 171st michelebastione 🇮🇹 439 132 24ms 23 Dec 2023 171st CatsAreFluffy 439 132 28ms 31 Jan 2024 171st FranklinJiaChen 439 132 26ms 4 Aug 2024 174th solisolu 436 133 11ms 5 Dec 2025 175th 40fied4t 430 135 12ms 23 Jan 2026 176th kevinnaviapaiva 426 136 11ms 42 mins ago 177th f-tucker 423 137 33ms 24 May 2024 177th Jaydosu 423 137 14ms 26 Jun 2024 177th mbittner20 423 137 21ms 13 Apr 2025 180th Emutis 🇱🇹 420 138 17ms 4 Aug 2025 181st AtengChen 414 140 13ms 14 Aug 2024 182nd ridingqwerty 🇺🇸 408 142 19ms 28 Dec 2023 182nd CyberTapir 408 142 11ms 5 Sep 2024 182nd wobblybits 408 142 21ms 20 Aug 2025 182nd cthierfelder 🇲🇨 408 142 21ms 14 Nov 2025 186th sciencejiho 406 143 21ms 18 Oct 2024 186th Andrey135296 406 143 12ms 26 Oct 2024 188th sultan 400 145 12ms 3 Mar 2024 188th alexeldridge 400 145 19ms 12 Aug 2024 188th ComputerKWasTaken 🇺🇸 400 145 23ms 23 Apr 2025 188th robin-scragg 400 145 81ms 30 Jul 2025 192nd amollberg 🇸🇪 397 146 20ms 8 Jan 2024 193rd RaBa21 🇭🇺 395 147 21ms 14 Jul 2025 194th Alban-Boissard 389 149 47ms 14 Jun 2025 194th 77Tigers 389 149 11ms 13 Jan 2026 196th jfallon1997 379 153 21ms 3 Jun 2024 197th AzroyAr 372 156 24ms 28 Dec 2023 198th adoxography 360 161 17ms 22 Oct 2024 199th gigaprofisi 🇺🇸 358 162 21ms 24 Jun 2025 200th mrmena 🇦🇺 341 170 11ms 19 Mar 2024 201st qwjhvbxi 333 174 12ms 6 Feb 2024 202nd Pale-Vessel 326 178 11ms 7 Mar 2024 203rd CodyKlingler 324 179 12ms 20 Jan 2025 204th JesseNoEyes 🇺🇸 322 180 13ms 24 Nov 2024 205th WillowWispy 319 182 11ms 14 Mar 2025 206th ItsEthanDev 314 185 12ms 24 Dec 2023 207th jtaxen 304 191 34ms 7 May 2024 208th jameswmccarty 297 195 18ms 25 Jan 2026 209th neonchickens 289 201 12ms 22 Jan 2025 210th azure-blondon 287 202 23ms 10 Dec 2023 211th galloj 🇨🇿 265 219 43ms 24 Apr 2024 212th TheZwierzLF 🇵🇱 253 229 53ms 30 May 2025 213th Unknownuserfrommars 250 232 21ms 22 Nov 2024 214th aksyristos 233 249 63ms 4 Sep 2024 215th muser-logiccpu 🇺🇦 226 257 13ms 19 Aug 2025 216th AidanWalter 212 273 10ms 3 Jan 2025 217th cingulataluke 165 352 22ms 3 Jun 2024 218th Zhenyu-Bo 158 368 12ms 1 Aug 2025 219th madeforlosers 26 2,208 13ms 11 Nov 2025 220th kurkale6ka 13 4,366 10ms 3 Jan 2024 220th returnitynet 13 4,366 12ms 3 Jan 2025 222nd zt14427 11 5,136 12ms 25 Dec 2023 223rd KatieLG-Transpiler 🇬🇧 11 5,140 11ms 1 Jan 2024 First Prev 161–223 of 223
