The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 3 days. Why not try and solve them ahead of time?
Intersection 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 854th bitsandbeyond 🇳🇱 581 132 11ms 16 Feb 2026 854th madex 🇩🇪 581 132 10ms 16 Feb 2026 854th D-MOVE 🇵🇭 581 132 10ms 19 Feb 2026 854th YAJUE114514 581 132 10ms 20 Feb 2026 885th CaedenHarper 🇨🇦 581 149 16ms 24 Aug 2025 886th commandz0 🇺🇸 580 119 519ms 1 Sep 2025 887th p-vf 🇨🇭 578 252 373ms 21 Nov 2021 888th AGoyet 577 133 10ms 29 Jun 2022 888th galloj 🇨🇿 577 133 10ms 4 Mar 2023 888th jfallon1997 577 133 10ms 9 Apr 2024 888th bknower 577 133 11ms 30 Jun 2025 888th aalec 577 133 11ms 9 Nov 2025 888th FoxInTheClouds 577 133 29ms 17 Feb 2026 888th Googolplexo 🇷🇺 577 133 11ms 7 hours ago 895th Athe81 577 150 10ms 2 Nov 2020 896th iznax 576 232 2ms 7 Oct 2020 896th kasarino 576 232 2ms 3 Feb 2026 898th TimCurwick 🇺🇸 573 130 487ms 30 Nov 2020 899th Natanaelel 🇸🇪 572 53 34ms 3 Mar 2022 900th badouralix 572 134 10ms 18 Mar 2021 900th NicholasSeward 572 134 21ms 9 Sep 2021 900th quimey 572 134 10ms 23 Mar 2023 900th TaserTheFox 🇺🇸 572 134 11ms 24 Mar 2023 900th cros107 🇦🇺 572 134 10ms 3 Jun 2023 900th namelessiw 572 134 11ms 15 Jan 2024 900th brimstonetrader 572 134 11ms 22 Jan 2024 900th mrmena 🇦🇺 572 134 10ms 27 Mar 2024 900th EnTerr 572 134 10ms 1 Sep 2024 900th andrewjc2000 572 134 10ms 9 Mar 2025 910th MeWhenI 🇻🇦 572 136 225ms 29 Jul 2024 911th m42km 570 121 435ms 16 Jan 2024 911th neel11235813 570 121 465ms 10 Mar 2024 913th CatsAreFluffy 569 152 11ms 17 Jan 2023 914th argusdusty 🇺🇸 568 135 10ms 25 Dec 2020 914th boxjelly 568 135 11ms 10 Feb 2021 914th sleepyStick 568 135 10ms 11 Mar 2022 914th smartiel 568 135 21ms 14 Sep 2022 914th trist224 🇫🇷 568 135 43ms 21 Sep 2022 914th randolchance 568 135 10ms 29 Dec 2022 914th Code-Coder-coder 568 135 10ms 24 Nov 2025 914th weeble 568 135 10ms 22 Feb 2026 914th Aquateraneal 🇺🇸 568 135 11ms 7 days ago 923rd richard-oelze 🇩🇪 566 153 12ms 11 Apr 2021 923rd stefangabos 🇷🇴 566 153 15ms 16 Nov 2025 925th roguh 🇬🇹 565 122 548ms 23 Jan 2024 926th david-ds 564 136 10ms 18 Mar 2021 926th hyperneutrino 564 136 17ms 28 Jun 2021 926th guilhem-roy 🇫🇷 564 136 10ms 23 Feb 2022 926th Terobero 564 136 10ms 2 Sep 2024 926th Pyroan 564 136 11ms 16 May 2025 926th Emutis 🇱🇹 564 136 11ms 30 Aug 2025 926th Bmrl7 564 136 10ms 25 Dec 2025 926th Openstreetmapler 564 136 11ms 16 Feb 2026 934th gigaprofisi 🇺🇸 562 154 13ms 10 Aug 2025 935th roylucas 562 313 427ms 15 Dec 2022 936th MarcMush 🇫🇷 560 137 10ms 9 Jul 2021 936th bob-th 560 137 10ms 19 Jul 2022 936th FrancoisXavierDecroix 560 137 10ms 16 Apr 2024 936th FranklinJiaChen 560 137 11ms 5 Aug 2024 940th albanian-laundromat 560 449 12ms 5 Dec 2025 941st emgordon154 559 155 9ms 11 Dec 2024 942nd Daniel-Ellison 558 124 251ms 9 Sep 2025 943rd jake-freeman 558 155 11ms 4 Nov 2020 943rd LordSir101 558 155 10ms 16 Aug 2025 945th snoozingnewt 🇨🇦 558 195 4ms 2 Oct 2025 946th janbehrens 🇩🇪 557 145 8ms 10 May 2021 947th jiaminglimjm 🇲🇾 556 138 10ms 9 Jan 2021 947th ArmaanAS 556 138 10ms 25 Mar 2021 947th TinyTheBrontosaurus 556 138 11ms 3 Dec 2023 947th markusgraube 556 138 10ms 1 Jul 2024 947th Mathrew2012 556 138 11ms 15 Aug 2024 947th fuzzylojik-golf 🇺🇸 556 138 31ms 13 days ago 953rd kgodara 555 152 86ms 18 Jan 2024 954th Shanethegamer 🇺🇸 555 156 10ms 22 Dec 2023 954th smclaughlin-cf 555 156 15ms 2 May 2025 954th a6166231 🇨🇳 555 156 10ms 22 May 2025 957th nwellnhof 🇩🇪 554 81 7ms 2 Jun 2022 958th snoozingnewt 🇨🇦 554 232 205ms 2 Oct 2025 959th snoozingnewt 🇨🇦 553 185 2,820ms 2 Oct 2025 960th AforAmpere 552 139 11ms 21 Feb 2021 First Prev 881–960 of 1,359 Next Last