The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 7 days. Why not try and solve them ahead of time?
United States in all languages 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 881st ehulinsky 🇺🇸 234 332 11ms 7 May 2023 882nd SuperFola 234 829 131ms 21 days ago 883rd myleopard 233 333 10ms 15 Oct 2021 883rd jatloe 233 333 12ms 28 Jan 2024 885th lewdev 🇺🇸 233 394 11ms 3 Jul 2024 886th tomh1012 232 396 13ms 27 Sep 2020 887th wearsunscreen 232 732 132ms 28 Sep 2023 888th dokutan 232 837 84ms 3 days ago 889th fitzdotlol 🇺🇸 231 398 22ms 21 Mar 2022 890th dokutan 230 473 72ms 20 Mar 2025 891st msbranicky 230 661 254ms 28 Oct 2023 892nd JRaspass 🇬🇧 228 221 6ms 25 Sep 2022 893rd CedricGebistorf 228 340 10ms 4 May 2023 894th funnyboy-roks 228 403 11ms 16 Jun 2024 894th snoozingnewt 🇨🇦 228 403 12ms 18 Jun 2024 896th Shanethegamer 🇺🇸 228 532 4ms 1 May 2025 897th Chinay-Domitrix 🇺🇸 228 557 538ms 5 days ago 898th BrenSchaap 227 341 19ms 21 Oct 2021 898th aalec 227 341 10ms 4 May 2024 898th damoose717 227 341 10ms 25 May 2025 901st sebipopa 🇷🇴 227 405 13ms 17 May 2023 902nd strout 227 750 134ms 24 Feb 2023 903rd MeWhenI 🇻🇦 226 482 748ms 6 Nov 2023 904th dokutan 226 1,045 2ms 6 Dec 2024 905th jeaosh 225 344 11ms 16 Nov 2024 906th oxjihun 225 345 12ms 23 Jul 2021 907th JRaspass 🇬🇧 224 255 248ms 25 Sep 2022 908th sanssaraf 224 346 29ms 2 May 2020 909th Schmitt-Very-Cool 224 567 698ms 3 Oct 2025 910th GitMensch 224 1,055 10ms 29 Nov 2024 911th dokutan 223 543 13ms 2 Apr 2024 912th stackofbears 221 295 36ms 7 Jul 2025 913th aresok 221 575 702ms 4 Jul 2023 914th frozolotl 221 687 166ms 14 Apr 2020 915th mousetail 🇳🇱 220 353 18ms 6 Jul 2024 916th eranws 220 418 16ms 24 Oct 2022 917th Chinay-Domitrix 🇺🇸 219 481 4,338ms 5 days ago 918th HumanoidCPU 218 355 18ms 23 Aug 2024 919th jhpaques 🇫🇷 218 356 11ms 8 Aug 2022 920th CameronGBell 215 361 11ms 18 Nov 2022 921st rbertram90 🇬🇧 215 440 5ms 3 May 2025 922nd bidger 215 590 604ms 17 Nov 2022 923rd jfallon1997 214 363 14ms 7 Sep 2022 924th postie77 213 443 484ms 5 Jul 2023 925th joonaspu 212 366 10ms 12 Jun 2023 926th prestosilver 🇺🇸 212 525 411ms 11 days ago 927th NanduBC 211 367 11ms 21 Mar 2021 928th Mikey-Beep 🇬🇧 210 369 10ms 24 Aug 2023 929th dirckvdende 210 370 10ms 11 Jul 2025 930th vonKrafft 209 440 10ms 27 Mar 2020 931st amberzit 208 372 11ms 3 Jul 2025 932nd wackbyte 208 730 367ms 7 Dec 2023 933rd ianpoe 207 374 16ms 30 Apr 2020 934th wearsunscreen 207 375 10ms 26 Sep 2023 935th yoshykai 207 613 592ms 31 Mar 2025 936th KatieLG 🇬🇧 207 1,201 1,596ms 13 Jan 2025 937th HumanoidCPU 206 344 484ms 23 Aug 2024 938th asadullayev 206 376 10ms 31 Oct 2021 939th vhoulbreque 🇫🇷 206 377 10ms 4 Dec 2025 940th Jaydosu 205 378 10ms 10 May 2022 941st Re-Adventures 🇮🇳 204 380 13ms 25 Sep 2020 942nd renthist 204 462 458ms 30 Jan 2022 943rd roy-sianez 203 452 2ms 16 Mar 2025 944th hacker112 🇸🇪 203 454 11ms 23 Jun 2024 945th gardarjuto 202 383 20ms 16 Nov 2020 946th The-Wolfson 202 625 139ms 2 Nov 2024 947th brochmann 🇸🇪 201 385 12ms 9 Feb 2022 948th ShiraJoseph 🇺🇸 201 458 13ms 28 Jan 2023 949th corbob 🇨🇦 200 382 289ms 1 May 2024 950th wrhm 199 389 10ms 15 Dec 2020 951st camieac 🇬🇧 196 396 11ms 9 Jun 2023 952nd jtthrillson 196 641 88ms 18 Dec 2021 953rd lukehewittvandy 196 647 584ms 12 Jul 2022 954th JGDoerrer 196 778 165ms 1 Feb 2022 955th dokutan 196 1,207 13ms 24 Dec 2024 956th firegene 🇮🇪 195 397 12ms 6 Jan 2022 956th bsoyka 🇺🇸 195 397 11ms 16 Jul 2022 958th Tenclea 195 471 11ms 26 Aug 2023 959th twocatsinatrenchcoat 194 399 11ms 21 May 2022 960th TaserTheFox 🇺🇸 194 400 11ms 24 Mar 2023 First Prev 881–960 of 1,421 Next Last
