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 561st rgthree 486 209 13ms 24 Aug 2023 562nd Natanaelel 🇸🇪 485 109 4ms 22 Jul 2022 563rd kurkale6ka 485 150 4ms 19 Dec 2023 563rd blaztoma 🇱🇹 485 150 6ms 25 Oct 2025 565th HumanoidCPU 484 153 510ms 11 Jan 2026 566th UnderKoen 🇳🇱 484 158 2ms 22 Jan 2024 567th Yewzir 🇧🇪 484 179 2ms 9 Feb 2024 568th vezzick 483 167 16ms 8 Mar 2021 568th Indivicivet 483 167 20ms 19 Mar 2021 568th joshmoody24 483 167 12ms 15 Feb 2022 568th keegan-t 🇨🇦 483 167 17ms 31 Jan 2026 572nd BREMAUCY 🇫🇷 482 205 503ms 27 Mar 2024 573rd stellartux 482 211 13ms 28 Dec 2023 574th crizin 🇰🇷 482 230 585ms 10 Sep 2023 575th bthalheim 480 168 20ms 10 Sep 2022 575th jmerle 🇳🇱 480 168 12ms 31 Oct 2022 575th dranjohn 480 168 16ms 11 Sep 2023 578th MeWhenI 🇻🇦 480 192 29ms 6 Jun 2023 579th kmathis22 480 231 599ms 6 Dec 2025 580th cipharius 480 267 120ms 21 Jan 2021 581st bastienvoirin 🇫🇷 477 169 11ms 30 Nov 2020 582nd eikhr 🇳🇴 477 213 11ms 14 Jun 2021 582nd Ashikpaul 🇮🇳 477 213 10ms 29 Jul 2022 582nd zakariamouhid 477 213 12ms 8 Jun 2023 585th pandapawskat 476 182 2ms 10 Sep 2021 586th lewdev 🇺🇸 475 214 11ms 14 Mar 2024 587th ZakkkkAttackkkk 🇵🇭 474 170 10ms 6 Sep 2023 588th frankgraziano 473 197 5ms 28 Dec 2022 589th itserasmus 473 215 10ms 26 Jan 2024 589th Protothor 473 215 11ms 4 Jun 2025 591st cjdyer 473 227 2,822ms 12 days ago 592nd mrmena 🇦🇺 472 171 10ms 7 Jun 2021 593rd Ripick 471 200 444ms 3 Oct 2024 594th Re-Adventures 🇮🇳 471 216 12ms 23 Apr 2021 594th uttumuttu 🇫🇮 471 216 12ms 7 Mar 2022 594th funnyboy-roks 471 216 14ms 15 Jun 2024 597th BREMAUCY 🇫🇷 471 230 8ms 21 Feb 2025 598th JesseNoEyes 🇺🇸 469 172 10ms 24 Nov 2024 599th janbehrens 🇩🇪 468 237 691ms 10 Jul 2023 600th snoozingnewt 🇨🇦 467 222 104ms 20 Nov 2025 601st Nwo5-trg 467 230 61ms 4 Feb 2026 602nd JOrE20 466 173 11ms 21 Feb 2026 603rd guliyevemil1 🇦🇿 465 276 127ms 31 Jan 2021 604th gifti258 464 199 92ms 15 Sep 2023 605th retrohun 464 201 5ms 30 Nov 2020 606th betaveros 463 174 10ms 2 Jan 2023 607th tomh1012 462 220 15ms 26 Nov 2020 608th za3k 461 175 10ms 10 Oct 2022 609th neihousaigaai 460 221 11ms 18 Apr 2021 609th SpareManiKatti 460 221 13ms 13 Oct 2021 611th ValentinCassayre 458 176 16ms 8 Oct 2022 612th ravnskjaer 🇩🇰 458 242 677ms 15 Dec 2025 613th NewDefectus 🇮🇱 456 177 17ms 4 Dec 2021 613th GolfingSuccess 🇬🇷 456 177 19ms 15 Nov 2022 615th Yewzir 🇧🇪 455 163 559ms 15 Jan 2024 616th NanduBC 453 178 12ms 18 Mar 2021 616th paiv 453 178 17ms 16 Jun 2025 618th jtnuttall 453 283 142ms 4 Oct 2022 619th CatsAreFluffy 452 225 10ms 29 Nov 2022 620th myleopard 451 179 12ms 14 Oct 2021 620th brochmann 🇸🇪 451 179 17ms 10 Feb 2022 620th Trunksistor 🇫🇷 451 179 10ms 26 Apr 2022 620th janbehrens 🇩🇪 451 179 12ms 10 Jul 2023 620th inverseLorentz 🇦🇺 451 179 20ms 2 Jun 2024 625th janbehrens 🇩🇪 450 177 6ms 2 Jul 2023 626th jgbaldwinbrown 449 314 343ms 2 Sep 2021 627th eranws 448 227 10ms 24 Oct 2022 627th Salutations45 448 227 15ms 16 Nov 2024 627th iczelia 🇩🇪 448 227 10ms 10 Oct 2025 630th kyleclaassen 446 181 17ms 8 Feb 2022 631st Maximizer02 446 222 6ms 19 Mar 2024 632nd Moreallure 446 228 14ms 5 May 2024 633rd Yewzir 🇧🇪 444 244 7ms 23 Dec 2024 634th Kloppermand 🇩🇰 443 182 21ms 26 Aug 2021 634th fgrosshans 🇫🇷 443 182 10ms 19 Sep 2023 636th solmyr2000 442 196 2ms 27 Jul 2022 637th GolfingSuccess 🇬🇷 441 168 473ms 2 Mar 2024 638th Andrey135296 441 183 10ms 30 Apr 2022 638th TaserTheFox 🇺🇸 441 183 10ms 12 Jan 2023 638th andrewjc2000 441 183 11ms 21 May 2025 First Prev 561–640 of 1,338 Next Last