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?
Time Distance 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 641st MeWhenI 🇻🇦 291 895 1,412ms 12 Apr 2022 642nd aglahir1 282 434 11ms 20 Jul 2022 643rd muser-logiccpu 🇺🇦 281 436 11ms 24 Jul 2025 644th DrPrettyman 278 440 12ms 31 May 2023 645th DGipe 271 452 11ms 6 Jun 2024 646th lyphyser 269 691 2ms 12 Jul 2023 647th eli-siegel 268 1,042 292ms 27 Jun 2023 648th Stockoh 🇫🇷 267 459 19ms 17 Oct 2024 649th KatieLG 🇬🇧 262 897 483ms 28 Dec 2022 650th adamnielson42 🇺🇸 261 470 11ms 21 Aug 2023 651st MeWhenI 🇻🇦 259 1,262 15ms 14 Apr 2022 652nd gigaprofisi 🇺🇸 256 530 10ms 4 Nov 2025 653rd ComputerKWasTaken 🇺🇸 255 480 11ms 23 Jan 2025 654th KatieLG-Transpiler 🇬🇧 248 494 11ms 25 Jun 2022 655th sleepyStick 246 497 18ms 14 Jul 2022 656th eli-siegel 244 502 11ms 27 Jun 2023 657th KatieLG-Transpiler 🇬🇧 241 562 11ms 2 Jul 2022 658th MeWhenI 🇻🇦 239 1,174 985ms 23 May 2022 659th Msleizak 🇫🇷 238 467 324ms 27 Jun 2025 660th StronkCheese 🇺🇸 227 575 102ms 3 Feb 2023 661st galloj 🇨🇿 224 547 11ms 30 Aug 2022 662nd KatieLG-Transpiler 🇬🇧 223 443 38ms 3 Jul 2022 663rd jtaxen 221 553 17ms 27 Mar 2024 664th joonaspu 220 557 12ms 4 Jun 2023 665th KatieLG-Transpiler 🇬🇧 217 561 184ms 2 Jul 2022 665th KatieLG 🇬🇧 217 561 202ms 6 Jan 2023 667th JesseNoEyes 🇺🇸 212 579 10ms 6 Mar 2025 668th TJK-S 210 583 10ms 1 Dec 2025 669th MeWhenI 🇻🇦 210 857 8ms 18 Nov 2023 670th MeWhenI 🇻🇦 209 624 104ms 26 May 2022 671st northvandrew 206 541 336ms 15 Jul 2022 672nd KevinMarquette 🇺🇸 196 567 321ms 18 Apr 2022 673rd Trunksistor 🇫🇷 191 640 11ms 24 May 2022 674th Bananapants22 180 680 12ms 20 Aug 2022 675th UltimateGuy0987 176 697 11ms 15 Oct 2022 676th grey0ut 159 700 338ms 10 May 2024 677th zwxzwxzwx21 159 772 12ms 30 Jan 2024 678th lyseoy 154 795 19ms 4 May 2024 679th Zhenyu-Bo 147 835 12ms 1 Aug 2025 680th Sloimayyy 129 953 17ms 22 Aug 2022 681st MeWhenI 🇻🇦 128 739 35ms 11 Apr 2022 682nd MeWhenI 🇻🇦 125 764 144ms 11 Apr 2022 683rd christensendaniel 115 1,063 12ms 15 May 2024 684th jipsong 🇩🇪 110 1,115 12ms 9 Jun 2025 685th KatieLG 🇬🇧 95 1,692 2ms 15 Sep 2024 686th KatieLG 🇬🇧 92 1,835 8ms 15 Sep 2024 687th AidanWalter 75 1,640 12ms 3 Jan 2025 688th ovs-code 🇩🇪 0 169 17ms 21 Jun 2025 689th KatieLG 🇬🇧 0 194 7ms 24 Sep 2025 690th dokutan 0 217 62ms 8 Feb 2026 First Prev 641–690 of 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