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?
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 albanian-laundromat 636 146 1,134ms 3 Nov 2025 402nd Natanaelel 🇸🇪 632 241 144ms 11 Jun 2025 403rd Feniske 🇫🇷 630 140 340ms 16 Nov 2023 404th janbehrens 🇩🇪 630 268 526ms 11 Aug 2023 405th MeWhenI 🇻🇦 629 501 16ms 19 Jul 2025 406th MeWhenI 🇻🇦 628 241 41ms 1 Feb 2024 407th MeWhenI 🇻🇦 627 198 166ms 30 hours ago 408th emgordon154 627 211 580ms 26 May 2025 409th angel-p57 🇯🇵 625 393 3ms 16 Dec 2023 410th Alex-x90 🇺🇸 624 199 2ms 5 Apr 2024 411th MeWhenI 🇻🇦 624 205 1,048ms 8 Jul 2023 412th olleicua 🇺🇸 622 124 35ms 7 Nov 2025 413th MichalMarsalek 🇨🇿 622 166 630ms 15 Jan 2024 414th CaedenHarper 🇨🇦 622 271 299ms 20 Nov 2025 415th madeforlosers 621 192 13ms 16 Sep 2024 415th a6166231 🇨🇳 621 192 11ms 12 Jun 2025 417th keegan-t 🇨🇦 621 200 11ms 19 Apr 2025 417th davidludwik2370 621 200 10ms 27 Jul 2025 419th 4hg 🇺🇸 620 110 35ms 2 Feb 2024 420th two-bad 🇬🇧 618 193 13ms 25 Feb 2024 421st nstearns96 🇬🇧 618 201 11ms 31 Dec 2023 422nd Shanethegamer 🇺🇸 618 267 464ms 8 Jun 2023 423rd janbehrens 🇩🇪 617 209 7ms 2 Jul 2023 424th rbertram90 🇬🇧 611 211 5ms 4 May 2025 425th emgordon154 608 139 5ms 20 May 2025 426th pschmid0 🇺🇸 608 212 5ms 6 Jun 2023 427th msbranicky 606 205 17ms 19 Oct 2023 427th CaedenHarper 🇨🇦 606 205 30ms 13 Aug 2025 429th Phil-RGOMEGA 603 239 2ms 30 Aug 2023 430th ravnskjaer 🇩🇰 603 280 448ms 15 Dec 2025 431st albanian-laundromat 602 408 1,433ms 28 Oct 2025 432nd andre-lameirinhas 🇵🇹 600 207 18ms 1 Jun 2023 433rd CatsAreFluffy 600 275 69ms 2 Jun 2023 434th Chinay-Domitrix 🇺🇸 599 212 2,853ms 13 days ago 435th retrohun 597 146 8ms 30 Dec 2024 436th Salutations45 596 200 10ms 4 Dec 2024 437th JRaspass 🇬🇧 594 135 4ms 19 Jun 2023 438th fkantelberg 594 209 13ms 24 Jul 2023 439th dokutan 594 248 11ms 3 Jul 2024 440th AbhayAravinda 593 201 11ms 14 Jun 2023 441st MeWhenI 🇻🇦 592 276 44ms 4 Sep 2024 442nd cros107 🇦🇺 591 210 18ms 9 Aug 2023 443rd Alex-x90 🇺🇸 589 211 12ms 17 Aug 2023 443rd wh3n3v3r 🇨🇿 589 211 11ms 10 Nov 2024 445th typeswitch-dev 🇵🇹 589 284 14ms 25 Aug 2023 446th coreynash 587 203 11ms 17 Nov 2023 447th emgordon154 585 217 2,938ms 28 Apr 2025 448th MeWhenI 🇻🇦 584 243 73ms 8 Nov 2023 449th janbehrens 🇩🇪 581 235 407ms 5 Jun 2023 450th anter69 🇭🇺 580 133 35ms 30 Jan 2026 451st guilhem-roy 🇫🇷 580 214 18ms 20 Jun 2023 452nd MeWhenI 🇻🇦 579 318 38ms 6 Jun 2023 453rd MeWhenI 🇻🇦 578 215 2ms 3 Sep 2023 453rd FlorianCassayre 🇫🇷 578 215 12ms 5 Aug 2025 453rd Emutis 🇱🇹 578 215 17ms 4 Nov 2025 456th CaedenHarper 🇨🇦 576 207 11ms 23 Aug 2025 456th Florian-Mt 576 207 12ms 16 Jan 2026 458th CatsAreFluffy 575 153 53ms 14 Feb 2024 459th RYNO8 575 216 11ms 13 Nov 2023 459th Mabeloid 🇳🇴 575 216 11ms 4 May 2025 461st MeWhenI 🇻🇦 571 258 13ms 13 Dec 2023 462nd MeWhenI 🇻🇦 570 178 13ms 18 Nov 2023 463rd Babafaba 570 218 18ms 26 Oct 2025 464th MeWhenI 🇻🇦 568 223 5ms 7 Dec 2023 465th m-tkach 🇺🇦 568 314 18ms 15 Jan 2025 466th adamnielson42 🇺🇸 567 219 12ms 2 Jun 2023 466th luuumine 🇫🇷 567 219 11ms 4 Nov 2025 468th namcartoon06 567 291 488ms 30 Jun 2023 469th tuffnatty 🇩🇪 566 296 5ms 21 Jul 2023 470th juliansiebert 🇩🇪 565 156 388ms 11 Dec 2023 471st rzv-me 565 228 5ms 5 Oct 2024 472nd malworthy 565 242 441ms 20 Aug 2024 473rd FortuiteMan 🇫🇷 564 220 11ms 17 Aug 2023 474th MeWhenI 🇻🇦 563 299 45ms 1 Feb 2024 475th CarsonChr 🇺🇸 562 212 12ms 9 Apr 2024 476th TaserTheFox 🇺🇸 559 222 10ms 1 Jun 2023 476th croc54 559 222 18ms 15 Dec 2024 478th kmathis22 554 305 383ms 8 Dec 2025 479th AlephSquirrel 552 247 14ms 24 Oct 2024 480th CaedenHarper 🇨🇦 549 308 420ms 7 Oct 2025 First Prev 401–480 of 619 Next Last