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 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 Natanaelel 🇸🇪 632 241 144ms 11 Jun 2025 402nd Feniske 🇫🇷 630 140 340ms 16 Nov 2023 403rd janbehrens 🇩🇪 630 268 526ms 11 Aug 2023 404th MeWhenI 🇻🇦 629 501 16ms 19 Jul 2025 405th MeWhenI 🇻🇦 628 241 41ms 1 Feb 2024 406th MeWhenI 🇻🇦 627 198 166ms 13 hours ago 407th emgordon154 627 211 580ms 26 May 2025 408th angel-p57 🇯🇵 625 393 3ms 16 Dec 2023 409th Alex-x90 🇺🇸 624 199 2ms 5 Apr 2024 410th MeWhenI 🇻🇦 624 205 1,048ms 8 Jul 2023 411th olleicua 🇺🇸 622 124 35ms 7 Nov 2025 412th MichalMarsalek 🇨🇿 622 166 630ms 15 Jan 2024 413th CaedenHarper 🇨🇦 622 271 299ms 20 Nov 2025 414th madeforlosers 621 192 13ms 16 Sep 2024 414th a6166231 🇨🇳 621 192 11ms 12 Jun 2025 416th keegan-t 🇨🇦 621 200 11ms 19 Apr 2025 416th davidludwik2370 621 200 10ms 27 Jul 2025 418th 4hg 🇺🇸 620 110 35ms 2 Feb 2024 419th two-bad 🇬🇧 618 193 13ms 25 Feb 2024 420th nstearns96 🇬🇧 618 201 11ms 31 Dec 2023 421st Shanethegamer 🇺🇸 618 267 464ms 8 Jun 2023 422nd janbehrens 🇩🇪 617 209 7ms 2 Jul 2023 423rd rbertram90 🇬🇧 611 211 5ms 4 May 2025 424th emgordon154 608 139 5ms 20 May 2025 425th pschmid0 🇺🇸 608 212 5ms 6 Jun 2023 426th msbranicky 606 205 17ms 19 Oct 2023 426th CaedenHarper 🇨🇦 606 205 30ms 13 Aug 2025 428th Phil-RGOMEGA 603 239 2ms 30 Aug 2023 429th ravnskjaer 🇩🇰 603 280 448ms 15 Dec 2025 430th albanian-laundromat 602 408 1,433ms 28 Oct 2025 431st andre-lameirinhas 🇵🇹 600 207 18ms 1 Jun 2023 432nd CatsAreFluffy 600 275 69ms 2 Jun 2023 433rd Chinay-Domitrix 🇺🇸 599 212 2,853ms 12 days ago 434th retrohun 597 146 8ms 30 Dec 2024 435th Salutations45 596 200 10ms 4 Dec 2024 436th JRaspass 🇬🇧 594 135 4ms 19 Jun 2023 437th fkantelberg 594 209 13ms 24 Jul 2023 438th dokutan 594 248 11ms 3 Jul 2024 439th AbhayAravinda 593 201 11ms 14 Jun 2023 440th MeWhenI 🇻🇦 592 276 44ms 4 Sep 2024 441st cros107 🇦🇺 591 210 18ms 9 Aug 2023 442nd Alex-x90 🇺🇸 589 211 12ms 17 Aug 2023 442nd wh3n3v3r 🇨🇿 589 211 11ms 10 Nov 2024 444th typeswitch-dev 🇵🇹 589 284 14ms 25 Aug 2023 445th coreynash 587 203 11ms 17 Nov 2023 446th emgordon154 585 217 2,938ms 28 Apr 2025 447th MeWhenI 🇻🇦 584 243 73ms 8 Nov 2023 448th janbehrens 🇩🇪 581 235 407ms 5 Jun 2023 449th anter69 🇭🇺 580 133 35ms 30 Jan 2026 450th guilhem-roy 🇫🇷 580 214 18ms 20 Jun 2023 451st MeWhenI 🇻🇦 579 318 38ms 6 Jun 2023 452nd MeWhenI 🇻🇦 578 215 2ms 3 Sep 2023 452nd FlorianCassayre 🇫🇷 578 215 12ms 5 Aug 2025 452nd Emutis 🇱🇹 578 215 17ms 4 Nov 2025 455th CaedenHarper 🇨🇦 576 207 11ms 23 Aug 2025 455th Florian-Mt 576 207 12ms 16 Jan 2026 457th CatsAreFluffy 575 153 53ms 14 Feb 2024 458th RYNO8 575 216 11ms 13 Nov 2023 458th Mabeloid 🇳🇴 575 216 11ms 4 May 2025 460th MeWhenI 🇻🇦 571 258 13ms 13 Dec 2023 461st MeWhenI 🇻🇦 570 178 13ms 18 Nov 2023 462nd Babafaba 570 218 18ms 26 Oct 2025 463rd MeWhenI 🇻🇦 568 223 5ms 7 Dec 2023 464th m-tkach 🇺🇦 568 314 18ms 15 Jan 2025 465th adamnielson42 🇺🇸 567 219 12ms 2 Jun 2023 465th luuumine 🇫🇷 567 219 11ms 4 Nov 2025 467th namcartoon06 567 291 488ms 30 Jun 2023 468th tuffnatty 🇩🇪 566 296 5ms 21 Jul 2023 469th juliansiebert 🇩🇪 565 156 388ms 11 Dec 2023 470th rzv-me 565 228 5ms 5 Oct 2024 471st malworthy 565 242 441ms 20 Aug 2024 472nd FortuiteMan 🇫🇷 564 220 11ms 17 Aug 2023 473rd MeWhenI 🇻🇦 563 299 45ms 1 Feb 2024 474th CarsonChr 🇺🇸 562 212 12ms 9 Apr 2024 475th TaserTheFox 🇺🇸 559 222 10ms 1 Jun 2023 475th croc54 559 222 18ms 15 Dec 2024 477th kmathis22 554 305 383ms 8 Dec 2025 478th AlephSquirrel 552 247 14ms 24 Oct 2024 479th CaedenHarper 🇨🇦 549 308 420ms 7 Oct 2025 480th MeWhenI 🇻🇦 547 161 271ms 8 Jul 2023 First Prev 401–480 of 618 Next Last