The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 4 days. Why not try and solve them ahead of time?
brainfuck 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 721st janbehrens 🇩🇪 511 190 7ms 2 Jul 2023 722nd cros107 🇦🇺 510 200 22ms 29 Jun 2024 722nd andrewjc2000 510 200 22ms 10 Jul 2025 724th ShiraJoseph 🇺🇸 510 209 12ms 12 Feb 2023 724th 52525rr 510 209 17ms 25 Feb 2026 726th DubiousDoggo 510 631 974ms 2 Dec 2021 727th AlephSquirrel 509 183 582ms 22 Jan 2024 728th edsrzf 🇳🇿 509 225 145ms 23 Mar 2025 729th jwonagel 509 320 422ms 2 Jun 2025 730th ovs-code 🇩🇪 508 279 4ms 22 Jul 2023 731st weliveinhell 🇭🇹 508 321 404ms 18 Jul 2024 732nd kkoenig 508 385 331ms 23 Jan 2024 732nd CaedenHarper 🇨🇦 508 385 312ms 17 Nov 2025 734th scpchicken 🇵🇼 507 99 26ms 28 Feb 2023 735th face0xff 507 201 21ms 18 Oct 2021 735th AGoyet 507 201 22ms 16 Jul 2022 737th Kibble 507 210 15ms 11 Jul 2020 738th khuldraeseth 505 202 22ms 11 Apr 2018 739th jacobly0 🇺🇸 505 253 4ms 3 Sep 2023 740th fisherthomas14 505 350 606ms 27 May 2021 741st anastos 504 390 147ms 26 Jul 2018 742nd MeWhenI 🇻🇦 503 168 1,534ms 15 Feb 2023 743rd JunkIce 503 185 648ms 13 Feb 2025 744th tomh1012 503 324 449ms 21 Nov 2021 745th quimey 502 203 22ms 26 Jul 2023 745th ceeb9 502 203 63ms 10 Jun 2024 745th retrohun 502 203 23ms 23 Jun 2024 748th Yewzir 🇧🇪 502 263 456ms 9 Mar 2024 749th Natanaelel 🇸🇪 501 255 3ms 15 Jun 2022 750th tdkkdt 🇷🇺 501 325 400ms 21 Nov 2021 751st dloscutoff 500 169 954ms 27 Nov 2018 752nd zbreit 🇺🇸 500 204 22ms 19 Aug 2021 752nd aglahir1 500 204 22ms 10 Nov 2021 752nd m42km 500 204 23ms 3 Feb 2024 755th NatNgs 500 213 13ms 7 Jan 2020 756th roupiq 🇵🇱 500 264 441ms 11 Jun 2024 757th sparksis 🇨🇦 499 354 479ms 31 Jan 2025 758th Ernest1338 499 471 210ms 23 Feb 2025 759th CatsAreFluffy 498 265 65ms 18 Dec 2023 760th amollberg 🇸🇪 497 205 22ms 21 Jan 2022 760th Anonymousellama21 497 205 21ms 26 Mar 2024 760th Languag3 497 205 24ms 8 Dec 2025 763rd marcin7Cd 496 296 83ms 20 Feb 2021 764th Jacob385 496 356 568ms 28 Oct 2025 765th aksyristos 495 206 22ms 1 Mar 2023 765th Alex-x90 🇺🇸 495 206 22ms 3 Feb 2024 767th MeWhenI 🇻🇦 495 209 2ms 25 Aug 2023 767th prestosilver 🇺🇸 495 209 2ms 14 Nov 2025 769th Natanaelel 🇸🇪 494 330 380ms 15 Dec 2021 770th FortuiteMan 🇫🇷 493 207 15ms 16 Aug 2023 771st igmcdowell 493 216 19ms 27 Jan 2022 771st janbehrens 🇩🇪 493 216 13ms 17 Jun 2023 773rd JRaspass 🇬🇧 492 102 23ms 2 Feb 2018 774th Nefsen402 491 217 16ms 24 Jan 2019 775th annaproxy 491 360 30ms 14 Jun 2024 776th adamnielson42 🇺🇸 490 208 23ms 26 Jan 2025 776th amberzit 490 208 22ms 5 Jul 2025 778th Michiocre 489 218 14ms 18 Jun 2024 779th annaproxy 489 333 407ms 6 Apr 2022 779th amazingalek 🇳🇴 489 333 432ms 21 Jan 2026 781st sjrct 488 209 65ms 9 Aug 2024 782nd janbehrens 🇩🇪 488 233 1,502ms 4 Sep 2021 783rd DaCuteRaccoon 488 401 334ms 28 Apr 2022 784th TheDarkThatBarks 487 219 13ms 18 May 2024 785th lukehewittvandy 487 363 666ms 27 May 2021 785th yoshykai 487 363 512ms 10 Apr 2025 787th Jonatan6 🇩🇰 486 213 2ms 11 Mar 2024 788th JGDoerrer 486 272 478ms 11 Jan 2022 789th msbranicky 485 375 3,435ms 11 Jan 2025 790th unkiwii 485 404 363ms 16 Apr 2020 791st perfunction 485 491 737ms 22 Jan 2020 792nd realslacker 484 172 432ms 6 Jun 2022 793rd adaGrad1 484 214 2ms 5 Sep 2023 794th Shanethegamer 🇺🇸 484 337 400ms 29 Dec 2022 795th trist224 🇫🇷 483 211 21ms 23 Nov 2022 796th robinastedt 482 215 2ms 6 Jun 2020 796th snoozingnewt 🇨🇦 482 215 2ms 21 Sep 2023 798th boxjelly 482 367 586ms 23 Feb 2021 799th Bubbler-4 481 150 28ms 24 Feb 2022 800th fuzzylojik-golf 🇺🇸 481 212 21ms 31 May 2025 First Prev 721–800 of 1,447 Next Last