The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 4 days. Why not try and solve them ahead of time?
Medal Tally 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 firegene 🇮🇪 353 246 11ms 25 Dec 2023 562nd Andriamanitra 🇫🇮 351 223 277ms 23 Jul 2023 563rd epic-programmer-guy 348 250 11ms 27 Dec 2023 564th yuchuehw 344 253 19ms 12 May 2024 565th kasarino 344 362 460ms 2 days ago 566th DGipe 340 256 11ms 4 Jun 2024 567th camieac 🇬🇧 337 258 11ms 8 Jun 2023 568th damoose717 336 259 11ms 24 May 2025 569th MeWhenI 🇻🇦 333 225 17ms 1 Feb 2024 570th Andrey2001 332 262 17ms 3 days ago 571st Supercip971 332 353 2ms 21 Jun 2023 572nd Mikey-Beep 🇬🇧 328 265 11ms 23 Aug 2023 572nd tomh1012 328 265 18ms 24 Feb 2026 574th jtaxen 326 267 17ms 9 Oct 2025 575th milowyner 326 441 136ms 16 Jun 2023 576th MeWhenI 🇻🇦 324 241 244ms 15 Oct 2023 577th galloj 🇨🇿 321 234 8ms 12 Apr 2024 578th JarrodCope 313 398 400ms 13 Jun 2024 579th RedzGoose 🇦🇺 303 287 18ms 25 Feb 2025 580th Andrey2001 298 261 507ms 3 days ago 581st CutSandstone 295 295 11ms 8 Jul 2024 582nd TheZwierzLF 🇵🇱 293 297 11ms 23 Nov 2025 583rd TheZwierzLF 🇵🇱 291 217 39ms 6 Jan 2026 584th ellis-rix 286 304 12ms 13 Jun 2023 584th zt14427 286 304 11ms 7 Jul 2025 586th adoxography 283 223 38ms 9 Jun 2023 587th KatieLG 🇬🇧 281 618 196ms 19 May 2024 588th TheZwierzLF 🇵🇱 276 282 635ms 23 Nov 2025 589th JOrE20 257 861 92ms 4 Dec 2025 590th inverseLorentz 🇦🇺 256 339 11ms 5 Oct 2023 591st Bit125 242 359 11ms 27 Mar 2024 592nd Ralac07 🇦🇺 239 364 11ms 24 Nov 2025 593rd Msleizak 🇫🇷 207 380 352ms 22 Jan 2025 594th brimstonetrader 196 443 11ms 26 Dec 2023 595th Zhenyu-Bo 190 458 12ms 31 Jul 2025 596th kevinnaviapaiva 174 499 11ms 24 Feb 2025 597th dokutan 171 584 13ms 2 Aug 2025 598th dokutan 164 539 137ms 2 Aug 2025 599th dokutan 138 1,107 1,389ms 31 Jul 2025 600th haighd 129 676 12ms 29 Oct 2023 601st AidanWalter 127 682 11ms 28 Nov 2025 602nd dokutan 111 1,476 424ms 29 Jul 2025 603rd dokutan 109 788 1,349ms 8 Sep 2025 604th dokutan 107 1,466 87ms 29 Jul 2025 605th dokutan 103 1,178 570ms 31 Jul 2025 606th dokutan 80 1,466 2ms 29 Jul 2025 607th MeWhenI 🇻🇦 75 3,220 4ms 30 Oct 2023 608th plcc0 0 30 44ms 8 May 2025 609th kg583 🇺🇸 0 44 267ms 9 Feb 2025 610th commandz0 🇺🇸 0 56 11ms 27 Jan 2026 611th ovs-code 🇩🇪 0 57 14ms 11 Jun 2025 611th AlephSquirrel 0 57 6ms 11 Jun 2025 613th ovs-code 🇩🇪 0 64 16ms 8 Jun 2025 614th dokutan 0 167 65ms 8 Feb 2026 615th edsrzf 🇳🇿 0 198 185ms 26 Jun 2025 616th dokutan 0 539 61ms 2 Aug 2025 First Prev 561–616 of 616
