The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 96 mins. Why not try and solve them ahead of time?
Arrows 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 881st dylanpyle 454 180 12ms 24 Mar 2022 881st MyltsinVV 454 180 13ms 27 Nov 2025 883rd BREMAUCY 🇫🇷 453 146 569ms 26 Dec 2025 884th mdnestor 452 160 12ms 27 Dec 2022 884th vishwathg 452 160 15ms 12 Oct 2023 884th therealnumbers 452 160 13ms 29 Sep 2025 887th HumanoidCPU 451 150 179ms 23 Nov 2025 888th veiko 451 181 12ms 20 Jun 2022 889th ridingqwerty 🇺🇸 450 147 676ms 22 Jan 2024 890th dokutan 449 202 199ms 19 Nov 2025 891st michaelbaudino 448 128 50ms 17 Mar 2022 891st dokutan 448 128 38ms 21 Sep 2025 893rd BREMAUCY 🇫🇷 447 203 119ms 28 Dec 2025 894th MisterrLuck 447 303 188ms 28 Oct 2024 895th Vianpyro 446 304 195ms 5 Feb 2026 896th alemelis 445 148 439ms 30 Sep 2024 897th CaedenHarper 🇨🇦 445 227 420ms 23 Aug 2025 898th tailorspy 445 229 77ms 25 Aug 2024 899th CheeseCake628 🇳🇴 444 149 589ms 17 Jan 2024 900th ravnskjaer 🇩🇰 444 244 783ms 15 Dec 2025 901st varhammer 444 288 9ms 13 Dec 2023 902nd connorslade 444 305 186ms 13 May 2022 903rd SniperSmiley 🇺🇸 443 163 13ms 18 Dec 2022 903rd logvp 443 163 47ms 1 Feb 2024 905th JRaspass 🇬🇧 443 273 353ms 23 Sep 2022 905th ibeucaly 443 273 355ms 6 Oct 2022 907th MeWhenI 🇻🇦 443 289 6ms 25 Nov 2023 908th Aurel300 🇨🇭 443 306 190ms 30 Jun 2024 909th Natanaelel 🇸🇪 442 110 242ms 3 Jan 2024 910th panekj 🇵🇱 442 307 195ms 3 May 2022 911th BobDotCom 440 164 14ms 25 Mar 2022 911th sleepyStick 440 164 13ms 14 Jul 2022 913th kyleclaassen 438 165 13ms 11 Mar 2022 913th kacogg5 438 165 15ms 20 Sep 2022 913th namelessiw 438 165 17ms 15 Jan 2024 916th yzhs 🇩🇪 437 338 190ms 6 Jun 2022 917th annaproxy 436 204 494ms 5 May 2022 918th Eolu 436 311 196ms 17 Jan 2022 919th trist224 🇫🇷 435 166 13ms 21 Feb 2023 920th KatieLG 🇬🇧 434 233 460ms 12 Oct 2024 921st panekj 🇵🇱 434 279 342ms 3 May 2022 921st harshit54 434 279 387ms 6 Jan 2024 923rd TRexOnGit 432 206 468ms 16 Jan 2024 924th msbranicky 430 154 667ms 17 Jan 2024 925th raspofabs 430 168 20ms 10 Jul 2023 925th Mefred 430 168 14ms 29 Oct 2025 925th ComradeSquirrel 430 168 12ms 3 days ago 928th corbob 🇨🇦 429 145 253ms 8 May 2024 929th nikolay 🇺🇸 429 282 399ms 5 Jan 2022 930th MWI-polygolf 427 82 46ms 6 Dec 2023 931st CatsAreFluffy 427 155 798ms 15 Jan 2024 932nd twocatsinatrenchcoat 427 169 13ms 14 Apr 2022 932nd rak1507 🇬🇧 427 169 14ms 3 Mar 2023 934th Kloppermand 🇩🇰 425 170 14ms 30 Aug 2021 934th ZakkkkAttackkkk 🇵🇭 425 170 19ms 30 Jul 2023 936th tomh1012 424 210 587ms 10 Sep 2025 937th jb-lopez 🇺🇸 423 188 7ms 8 Nov 2021 938th tatzyr 🇯🇵 422 136 37ms 26 Mar 2025 939th msbranicky 422 156 320ms 20 Jan 2024 940th Florian-Mt 422 171 11ms 27 Nov 2023 940th l-donovan 422 171 13ms 6 Feb 2024 942nd dokutan 422 211 454ms 24 Nov 2025 943rd jtaxen 420 172 15ms 21 May 2024 943rd Babafaba 420 172 23ms 29 Oct 2025 945th ezrillex 420 212 472ms 13 Mar 2022 946th snoozingnewt 🇨🇦 419 116 190ms 10 Dec 2025 947th denkyuu1 419 157 383ms 11 hours ago 948th MeWhenI 🇻🇦 419 344 7ms 30 Nov 2022 949th hiichbindermax 418 173 12ms 5 Oct 2024 950th bbakersmith 418 181 36ms 7 Jun 2022 951st KatieLG 🇬🇧 418 266 137ms 12 Sep 2021 952nd cros107 🇦🇺 415 174 17ms 9 Aug 2023 953rd Andrey2001 413 175 14ms 25 Nov 2025 954th RokasBakutis 412 216 491ms 10 Apr 2023 955th martindotexe 🇳🇴 412 294 391ms 18 May 2025 956th MeWhenI 🇻🇦 411 148 49ms 15 Dec 2021 957th celiendonze 🇨🇭 410 176 14ms 21 Apr 2023 958th alexsave 410 199 13ms 16 Oct 2025 959th Feniske 🇫🇷 409 152 227ms 23 Oct 2023 960th ehulinsky 🇺🇸 408 177 13ms 10 May 2023 First Prev 881–960 of 1,332 Next Last