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?
Zodiac Signs 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 401st ahmetdemirag 🇨🇾 673 197 14ms 19 Nov 2024 402nd MeWhenI 🇻🇦 673 316 1,678ms 7 Nov 2025 403rd MeWhenI 🇻🇦 669 105 8ms 14 Jun 2022 404th TobyBoyne 🇬🇧 669 198 12ms 19 Jul 2022 405th inventshah 669 253 51ms 22 Sep 2022 406th Shanethegamer 🇺🇸 667 281 232ms 16 Oct 2022 407th jacekwladzinski 666 199 11ms 7 Oct 2025 408th CaedenHarper 🇨🇦 666 250 297ms 29 Oct 2025 409th Shanethegamer 🇺🇸 665 131 3ms 8 Nov 2022 410th Shanethegamer 🇺🇸 665 203 112ms 14 Oct 2022 411th btjones0 662 200 12ms 15 Jul 2022 412th retrohun 661 182 234ms 19 Jun 2022 413th scpchicken 🇵🇼 659 182 12ms 14 Jan 2023 413th weliveinhell 🇭🇹 659 182 11ms 4 Dec 2023 415th jakobkordez 🇸🇮 659 201 31ms 27 Oct 2022 416th albanian-laundromat 659 479 13ms 25 Nov 2025 417th MeWhenI 🇻🇦 657 165 1,023ms 15 Sep 2025 418th retrohun 656 202 11ms 11 Nov 2025 419th albanian-laundromat 653 197 5ms 20 Feb 2026 420th CaedenHarper 🇨🇦 653 302 3ms 7 Nov 2025 421st CaedenHarper 🇨🇦 652 178 538ms 15 Aug 2025 422nd MeWhenI 🇻🇦 650 226 43ms 29 Apr 2025 423rd olleicua 🇺🇸 649 304 3ms 8 Nov 2025 424th niklv 🇷🇺 648 185 13ms 29 Jul 2022 425th Shanethegamer 🇺🇸 647 116 5ms 12 Dec 2022 426th MeWhenI 🇻🇦 646 199 4ms 21 Jul 2023 427th alexsave 645 186 15ms 5 Jan 2026 428th annaproxy 642 221 440ms 11 Jun 2022 429th luuumine 🇫🇷 640 207 14ms 9 Nov 2025 430th JOrE20 638 188 12ms 21 Feb 2026 431st MeWhenI 🇻🇦 637 286 46ms 4 Sep 2024 432nd mrnomm 634 209 11ms 12 Aug 2022 432nd olleicua 🇺🇸 634 209 19ms 7 Nov 2025 434th MeWhenI 🇻🇦 632 192 100ms 12 Dec 2022 435th CaedenHarper 🇨🇦 630 270 413ms 6 days ago 436th elgan65536 🇺🇸 629 298 228ms 9 Apr 2024 437th janbehrens 🇩🇪 628 211 21ms 17 Jun 2023 438th stefangimmillaro 627 207 9ms 4 Sep 2023 439th MeWhenI 🇻🇦 626 208 111ms 6 Nov 2023 440th MeWhenI 🇻🇦 625 225 442ms 12 Jun 2022 441st commandz0 🇺🇸 616 215 13ms 7 Sep 2022 441st jatloe 616 215 328ms 23 Oct 2024 441st BREMAUCY 🇫🇷 616 215 14ms 21 Aug 2025 444th Salutations45 612 196 10ms 16 Nov 2024 445th TheZwierzLF 🇵🇱 611 190 535ms 14 Dec 2025 446th MeWhenI 🇻🇦 611 197 200ms 18 Nov 2023 447th TheZwierzLF 🇵🇱 611 217 19ms 14 Dec 2025 448th celiendonze 🇨🇭 608 218 13ms 29 Mar 2023 449th MeWhenI 🇻🇦 608 229 10ms 6 Aug 2023 450th didion0 🇺🇸 603 199 16ms 10 Jun 2022 450th C0de5mith 🇺🇸 603 199 13ms 7 Aug 2022 450th KatieLG 🇬🇧 603 199 12ms 7 Feb 2024 450th acollett89 603 199 12ms 4 Aug 2025 454th MeWhenI 🇻🇦 603 524 15ms 1 Aug 2023 455th aglahir1 602 220 12ms 20 Jul 2022 456th plcc0 599 134 137ms 29 Dec 2025 457th Mabeloid 🇳🇴 599 209 2ms 6 Oct 2024 458th fkantelberg 597 222 14ms 21 Jul 2025 459th plcc0 595 126 4ms 29 Dec 2025 460th MeWhenI 🇻🇦 593 149 275ms 15 Feb 2023 461st MeWhenI 🇻🇦 591 203 2,498ms 27 Oct 2024 462nd janbehrens 🇩🇪 591 240 410ms 24 Apr 2023 462nd CaedenHarper 🇨🇦 591 240 408ms 17 Oct 2025 464th coreynash 588 204 18ms 14 Mar 2024 465th CaedenHarper 🇨🇦 588 289 116ms 7 Nov 2025 466th janbehrens 🇩🇪 585 205 15ms 24 Jun 2022 467th adamnielson42 🇺🇸 584 227 12ms 25 Apr 2023 468th KatieLG 🇬🇧 583 165 34ms 29 Aug 2024 469th snoozingnewt 🇨🇦 580 293 152ms 8 Nov 2025 470th AlephSquirrel 579 225 65ms 1 Dec 2025 471st janbehrens 🇩🇪 579 294 487ms 12 Sep 2022 472nd BambooleanLogic 🇸🇪 574 209 13ms 28 Jul 2022 473rd MeWhenI 🇻🇦 573 258 1,435ms 13 Jun 2022 474th snoozingnewt 🇨🇦 573 341 28ms 21 Nov 2025 475th MeWhenI 🇻🇦 569 209 9ms 19 Jul 2022 476th abt8601 🇹🇼 569 233 20ms 15 Jul 2022 477th MeWhenI 🇻🇦 568 330 170ms 13 Jun 2022 478th nephila-nacrea 🇬🇧 564 133 5ms 3 Jul 2023 479th Pyroan 564 235 20ms 22 Jan 2026 480th shinh 562 171 36ms 26 Jun 2022 First Prev 401–480 of 670 Next Last