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 bytes. 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 Bytes Time Submitted 801st mrmena 🇦🇺 320 328 12ms 4 Jul 2021 802nd mrmena 🇦🇺 320 411 41ms 9 Jun 2024 803rd dcgjb 319 256 835ms 6 May 2024 804th ravnskjaer 🇩🇰 319 422 604ms 15 Dec 2025 805th j-Ewan 316 332 10ms 25 Feb 2022 805th ehulinsky 🇺🇸 316 332 11ms 7 May 2023 807th JRaspass 🇬🇧 315 221 6ms 25 Sep 2022 808th heanyang1 315 324 2ms 23 May 2025 809th myleopard 315 333 10ms 15 Oct 2021 810th denkyuu1 314 240 36ms 12 hours ago 811th salipshitz 314 320 12ms 16 Apr 2020 812th ryanlanegit 313 261 326ms 18 Jun 2022 813th xPMo 313 320 3ms 28 Jun 2024 814th Yewzir 🇧🇪 313 391 477ms 4 Feb 2023 815th Zekaroni 312 337 10ms 2 Feb 2023 816th Ripick 312 363 418ms 4 Jul 2025 817th lacroixjonathan87 311 311 5ms 16 Aug 2020 818th salipshitz 311 547 357ms 16 Apr 2020 819th bwat2 310 435 617ms 9 Mar 2022 819th crizin 🇰🇷 310 435 673ms 10 Sep 2023 821st CedricGebistorf 309 340 10ms 4 May 2023 822nd BrenSchaap 308 341 19ms 21 Oct 2021 822nd aalec 308 341 10ms 4 May 2024 822nd damoose717 308 341 10ms 25 May 2025 825th jeaosh 305 344 11ms 16 Nov 2024 826th xkacer 🇨🇿 304 345 10ms 25 Jan 2021 826th oxjihun 304 345 12ms 23 Jul 2021 828th someoneelsecodedthat 304 784 11ms 12 Dec 2024 829th sanssaraf 303 346 29ms 2 May 2020 830th arcpolaris 301 358 460ms 9 Nov 2025 831st MahlerFive 🇨🇦 301 566 334ms 19 Apr 2020 832nd Andriamanitra 🇫🇮 299 380 3ms 24 Sep 2022 833rd MaxCastella 🇫🇷 298 274 281ms 17 Oct 2023 834th mousetail 🇳🇱 297 353 18ms 6 Jul 2024 835th JRaspass 🇬🇧 296 255 248ms 25 Sep 2022 836th GeorgeStechman 🇬🇧 296 339 13ms 20 Sep 2022 837th jhpaques 🇫🇷 295 356 11ms 8 Aug 2022 838th Stockoh 🇫🇷 292 359 12ms 5 Nov 2023 839th CarsonChr 🇺🇸 291 345 11ms 22 Apr 2023 840th CameronGBell 291 361 11ms 18 Nov 2022 840th thisishowmymindworks 🇳🇴 291 361 10ms 29 May 2024 842nd jfallon1997 289 363 14ms 7 Sep 2022 843rd fkantelberg 288 365 11ms 21 Jul 2025 844th snoozingnewt 🇨🇦 288 468 790ms 10 Oct 2025 845th lharck 🇺🇸 288 484 2ms 4 Jul 2021 846th joonaspu 287 366 10ms 12 Jun 2023 847th dpethes 287 375 467ms 16 Jul 2022 848th NanduBC 286 367 11ms 21 Mar 2021 849th Mikey-Beep 🇬🇧 285 369 10ms 24 Aug 2023 850th zakariamouhid 284 354 13ms 23 Jul 2023 851st dirckvdende 284 370 10ms 11 Jul 2025 852nd amberzit 282 372 11ms 3 Jul 2025 853rd ianpoe 281 374 16ms 30 Apr 2020 854th stackofbears 280 295 36ms 7 Jul 2025 855th zelenovas 🇷🇺 280 345 5ms 8 Feb 2023 856th wearsunscreen 280 375 10ms 26 Sep 2023 857th nat-418 280 406 11ms 3 Nov 2022 858th asadullayev 279 376 10ms 31 Oct 2021 859th vhoulbreque 🇫🇷 278 377 10ms 4 Dec 2025 860th Jaydosu 278 378 10ms 10 May 2022 861st ethan7g 277 362 17ms 16 Apr 2020 862nd biocommando 🇫🇮 277 363 11ms 23 Jun 2025 863rd cure-honey 🇯🇵 277 607 42ms 28 Apr 2020 864th strattonwhisler 276 364 12ms 29 Jun 2023 865th gardarjuto 274 383 20ms 16 Nov 2020 866th brochmann 🇸🇪 273 385 12ms 9 Feb 2022 867th ian-h-chamberlain 🇺🇸 273 594 175ms 16 Oct 2020 868th yuchuehw 272 496 557ms 5 Jul 2024 869th tomh1012 271 516 65ms 9 Feb 2026 870th wrhm 270 389 10ms 15 Dec 2020 871st Isaac-NTT 268 374 12ms 4 Jul 2023 871st madeforlosers 268 374 11ms 14 Jan 2025 873rd camieac 🇬🇧 265 396 11ms 9 Jun 2023 874th marcin7Cd 265 509 6ms 8 Feb 2021 875th firegene 🇮🇪 264 397 12ms 6 Jan 2022 875th bsoyka 🇺🇸 264 397 11ms 16 Jul 2022 877th twocatsinatrenchcoat 263 399 11ms 21 May 2022 878th TaserTheFox 🇺🇸 262 400 11ms 24 Mar 2023 879th jmerle 🇳🇱 262 401 17ms 10 Jul 2023 879th robin-scragg 262 401 10ms 21 Sep 2025 First Prev 801–880 of 1,428 Next Last
