The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 3 hours. Why not try and solve them ahead of time?
Zodiac Signs 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 401st Mabeloid 🇳🇴 572 209 2ms 6 Oct 2024 402nd janbehrens 🇩🇪 572 240 410ms 24 Apr 2023 402nd CaedenHarper 🇨🇦 572 240 408ms 17 Oct 2025 404th snoozingnewt 🇨🇦 572 293 138ms 8 Nov 2025 405th two-bad 🇬🇧 570 173 11ms 25 Feb 2024 406th abt8601 🇹🇼 570 263 169ms 15 Jul 2022 407th MeWhenI 🇻🇦 569 203 2,498ms 27 Oct 2024 408th MeWhenI 🇻🇦 567 197 200ms 18 Nov 2023 409th Babafaba 566 147 396ms 4 Nov 2025 410th janbehrens 🇩🇪 565 294 487ms 12 Sep 2022 411th snoozingnewt 🇨🇦 565 341 28ms 21 Nov 2025 412th rucin93 🇵🇱 564 150 155ms 3 Aug 2024 413th acollett89 563 175 11ms 4 Aug 2025 414th Shanethegamer 🇺🇸 561 146 309ms 24 Feb 2023 415th OllieBoyne 🇬🇧 561 161 19ms 10 Jun 2022 415th roguh 🇬🇹 561 161 12ms 22 Feb 2024 415th StefanHabel 🇨🇦 561 161 13ms 2 days ago 418th CaedenHarper 🇨🇦 561 302 3ms 7 Nov 2025 419th MeWhenI 🇻🇦 560 165 1,197ms 15 Sep 2025 420th MeWhenI 🇻🇦 559 258 1,435ms 13 Jun 2022 421st Irratix 🇳🇱 558 162 18ms 2 Jul 2022 422nd olleicua 🇺🇸 557 304 3ms 8 Nov 2025 423rd MeWhenI 🇻🇦 557 330 170ms 13 Jun 2022 424th MeWhenI 🇻🇦 554 209 9ms 19 Jul 2022 425th jared-hughes 552 131 40ms 19 Sep 2022 426th UnderKoen 🇳🇱 551 210 15ms 10 Jun 2022 427th coreynash 547 180 12ms 14 Mar 2024 428th janbehrens 🇩🇪 545 233 7ms 8 Jun 2023 429th MichalMarsalek 🇨🇿 544 166 11ms 14 Jan 2023 429th fgrosshans 🇫🇷 544 166 11ms 12 Jul 2024 429th madex 🇩🇪 544 166 12ms 14 days ago 432nd MeWhenI 🇻🇦 544 192 100ms 12 Dec 2022 433rd Natanaelel 🇸🇪 541 167 12ms 11 Jun 2022 433rd martinnorling 🇸🇪 541 167 11ms 16 Jun 2022 433rd suhasdara 541 167 12ms 16 Aug 2022 433rd yzhs 🇩🇪 541 167 22ms 23 Jun 2023 433rd croc54 541 167 13ms 7 Jan 2025 438th scpchicken 🇵🇼 541 182 12ms 14 Jan 2023 438th weliveinhell 🇭🇹 541 182 11ms 4 Dec 2023 440th Mabeloid 🇳🇴 540 154 487ms 6 Oct 2024 441st edsrzf 🇳🇿 540 198 14ms 20 Feb 2025 442nd MeWhenI 🇻🇦 540 275 32ms 6 Jun 2023 443rd guilhem-roy 🇫🇷 538 168 11ms 29 Jun 2022 443rd YAJUE114514 538 168 12ms 3 Aug 2025 445th postie77 538 255 431ms 28 Jun 2024 446th h3ra993huskp 🇯🇵 538 309 468ms 30 Nov 2025 447th C0de5mith 🇺🇸 536 184 14ms 7 Aug 2022 448th Xzyaihni 536 343 209ms 19 Jan 2024 449th Natanaelel 🇸🇪 535 106 183ms 11 Jun 2022 450th twocatsinatrenchcoat 535 169 12ms 15 Jun 2022 451st alexsave 530 186 12ms 5 Jan 2026 452nd MeWhenI 🇻🇦 530 208 111ms 6 Nov 2023 453rd yuchuehw 528 171 21ms 2 Feb 2024 454th MichaelMBradley 🇨🇦 525 172 12ms 11 Jun 2022 455th MeWhenI 🇻🇦 523 117 3ms 13 Jun 2022 456th retrohun 520 162 3ms 10 Nov 2025 457th TobyBoyne 🇬🇧 519 174 12ms 19 Jul 2022 458th snoozingnewt 🇨🇦 519 320 532ms 8 Nov 2025 459th BREMAUCY 🇫🇷 517 324 149ms 8 Nov 2025 460th jacekwladzinski 516 175 11ms 7 Oct 2025 461st jotslo 🇬🇧 515 214 2ms 17 Jul 2022 462nd albanian-laundromat 514 254 135ms 1 Dec 2025 463rd arctouch-cristiannevianna 514 267 417ms 27 Feb 2024 464th didion0 🇺🇸 513 192 15ms 10 Jun 2022 465th jacobly0 🇺🇸 512 395 1,805ms 22 Apr 2024 466th galloj 🇨🇿 510 177 11ms 2 Sep 2022 467th retrohun 508 178 11ms 11 Nov 2025 468th Troon 505 179 15ms 12 Mar 2025 469th MeWhenI 🇻🇦 503 147 275ms 15 Feb 2023 470th MeWhenI 🇻🇦 503 168 156ms 3 Aug 2024 471st BREMAUCY 🇫🇷 502 180 14ms 21 Aug 2025 472nd scpchicken 🇵🇼 500 104 5ms 14 Jan 2023 473rd janbehrens 🇩🇪 500 197 13ms 24 Jun 2022 474th MeWhenI 🇻🇦 500 286 46ms 4 Sep 2024 475th neihousaigaai 496 182 12ms 9 Jun 2022 476th jerrandolph 495 328 293ms 23 Dec 2023 477th shinh 491 147 36ms 26 Jun 2022 478th AlephSquirrel 490 225 65ms 1 Dec 2025 479th FortuiteMan 🇫🇷 486 186 13ms 15 Oct 2025 480th tomh1012 485 283 415ms 17 Nov 2025 First Prev 401–480 of 668 Next Last