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?
Emojify 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 401st 1e11e 599 185 680ms 8 Mar 2022 402nd annaproxy 599 214 124ms 21 Jul 2022 403rd tpiechaczek 🇵🇱 598 170 13ms 11 Jan 2021 403rd helbling 🇨🇭 598 170 11ms 15 Apr 2024 403rd voytxt 🇨🇿 598 170 11ms 23 Jul 2024 406th edsrzf 🇳🇿 597 128 2ms 23 Feb 2025 407th bizy-coder 597 135 29ms 19 Oct 2024 408th elgan65536 🇺🇸 597 211 299ms 29 Mar 2024 409th gnlow 🇰🇷 595 171 14ms 6 Mar 2021 409th janbehrens 🇩🇪 595 171 10ms 10 Jul 2023 409th JOrE20 595 171 15ms 21 Feb 2026 412th jared-hughes 594 113 38ms 23 Jul 2022 413th JDiLenarda 🇫🇷 592 197 1,404ms 22 Nov 2023 414th jared-hughes 591 109 33ms 12 Sep 2022 415th namelessiw 590 188 734ms 10 Oct 2025 416th qpwoeirut 589 137 12ms 6 Nov 2025 417th dokutan 588 106 312ms 7 Jun 2025 418th xyangst 588 173 11ms 23 Sep 2024 418th kovdmm 588 173 11ms 13 Oct 2024 420th lifthrasiir 🇰🇷 587 90 3ms 6 Dec 2024 421st heanyang1 586 148 2ms 20 Apr 2025 422nd coreynash 584 174 10ms 19 Sep 2023 423rd roelderickx 583 216 175ms 14 days ago 424th the-zammers 583 220 124ms 1 Dec 2024 425th nullshallot 581 129 292ms 3 Jan 2025 426th thisishowmymindworks 🇳🇴 581 175 16ms 9 Jun 2024 426th KatieLG 🇬🇧 581 175 13ms 5 Oct 2025 428th msbranicky 580 243 379ms 31 Aug 2023 429th iznax 578 171 483ms 21 Nov 2021 430th vibdev 578 176 14ms 26 Aug 2021 431st stefangimmillaro 577 136 2ms 16 Jul 2025 432nd dcgjb 576 130 305ms 6 May 2024 433rd prplz 🇦🇺 576 160 29ms 31 Jan 2023 434th emgordon154 574 128 1,654ms 4 Jun 2025 435th ereztaiar 🇮🇱 574 177 10ms 4 Sep 2021 436th annaproxy 572 141 11ms 21 Jul 2022 436th albanian-laundromat 572 141 13ms 25 May 2025 438th roavin 572 173 454ms 7 Jun 2022 439th alexsave 571 178 10ms 29 Oct 2024 440th emgordon154 570 113 37ms 24 Jun 2024 441st boxjelly 570 225 126ms 12 Feb 2021 442nd MeWhenI 🇻🇦 568 174 7ms 12 Apr 2024 443rd stefangabos 🇷🇴 565 180 16ms 12 Sep 2022 444th tobeannouncd 565 227 145ms 2 Nov 2023 445th yzhs 🇩🇪 564 143 10ms 28 Nov 2020 445th xkacer 🇨🇿 564 143 10ms 30 Jan 2021 445th nstearns96 🇬🇧 564 143 13ms 12 Jan 2023 445th tnecio 564 143 9ms 24 May 2024 449th HumanoidCPU 562 181 12ms 21 Feb 2025 450th Yewzir 🇧🇪 562 191 59ms 9 Feb 2024 450th dokutan 562 191 57ms 8 Nov 2025 452nd MeWhenI 🇻🇦 562 199 46ms 29 Aug 2024 453rd MeWhenI 🇻🇦 562 415 10ms 19 Jul 2025 454th SirBogman 🇺🇸 561 132 587ms 16 Jan 2024 455th Flekay 🇩🇪 560 144 10ms 15 Feb 2026 456th alphafalfa 560 186 2ms 6 Nov 2024 457th Shanethegamer 🇺🇸 560 361 1,577ms 23 Apr 2025 458th adriweb 🇫🇷 559 181 27ms 29 Aug 2023 459th kurkale6ka 556 145 32ms 19 Dec 2023 460th two-bad 🇬🇧 556 183 12ms 14 Dec 2023 460th shandriy 556 183 11ms 26 Dec 2025 462nd dim-an 552 146 10ms 9 Dec 2020 462nd InigoK 🇺🇸 552 146 10ms 2 Apr 2023 462nd ahmetdemirag 🇨🇾 552 146 11ms 17 Feb 2025 465th detrumi 🇳🇱 552 228 187ms 14 Feb 2021 466th nullie 549 147 12ms 8 Jun 2022 467th daniel-skalik 🇨🇿 549 180 506ms 21 Nov 2021 467th elephantpanda 549 180 483ms 11 Aug 2022 469th MeWhenI 🇻🇦 547 153 3ms 1 Oct 2022 470th olleicua 🇺🇸 546 118 41ms 23 Dec 2023 471st Troon 545 148 11ms 18 Feb 2025 472nd Waffle3z 544 186 2ms 4 Aug 2022 473rd GeorgeStechman 🇬🇧 544 187 11ms 28 Sep 2022 473rd dylanarmstrong 544 187 10ms 25 Jan 2024 473rd attila8192 544 187 10ms 11 May 2025 476th tatzyr 🇯🇵 541 119 40ms 18 Feb 2025 477th asheeri 541 149 11ms 18 Aug 2021 477th keelimeguy 🇺🇸 541 149 17ms 6 Nov 2023 479th DanielVenable 541 188 11ms 27 Mar 2025 480th emgordon154 538 129 4ms 21 Aug 2024 First Prev 401–480 of 1,338 Next Last