The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 6 days. Why not try and solve them ahead of time?
Spelling Numbers 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 721st lrustand 320 348 14ms 18 Jan 2018 722nd jared-hughes 319 349 13ms 25 Mar 2022 722nd shelerr 319 349 14ms 23 Aug 2025 724th BettaGeorge 317 300 4ms 24 Dec 2017 725th inventshah 315 354 33ms 27 Jan 2023 725th TaserTheFox 🇺🇸 315 354 22ms 20 Apr 2023 727th avavuvu 315 528 11ms 20 Jun 2025 728th OllieBoyne 🇬🇧 314 355 16ms 18 Apr 2022 729th yokasuretsu 313 371 35ms 19 Apr 2018 730th keelanfh 312 357 15ms 14 Mar 2023 731st kjetillll 🇮🇩 311 305 5ms 19 May 2021 732nd daedals 311 358 15ms 22 May 2019 733rd dokutan 310 1,177 282ms 1 Dec 2025 734th Pyroan 309 361 14ms 8 Mar 2025 735th MeWhenI 🇻🇦 307 309 4ms 16 Apr 2023 736th fourth-bit 307 363 13ms 14 Jul 2023 736th mathisfun271 307 363 14ms 23 Nov 2023 738th lukehewittvandy 307 777 437ms 13 May 2021 739th markus-rekdal 305 365 21ms 15 Nov 2019 739th MichalMarsalek 🇨🇿 305 365 13ms 8 Dec 2022 741st janbehrens 🇩🇪 303 314 6ms 28 May 2021 742nd GolfingSuccess 🇬🇷 303 347 596ms 5 Feb 2026 743rd Irratix 🇳🇱 303 368 975ms 4 Jul 2022 744th CaedenHarper 🇨🇦 302 335 122ms 14 days ago 745th dzhang314 302 369 21ms 13 Aug 2019 746th myfatemi04 300 372 14ms 9 Jan 2018 746th CedricGebistorf 300 372 14ms 13 Mar 2022 746th msbranicky 300 372 20ms 9 Aug 2023 749th owenoclee 300 555 14ms 7 Oct 2017 750th AkashTandon167 299 373 13ms 24 Jan 2021 750th quimey 299 373 12ms 3 Aug 2023 750th andrewjc2000 299 373 12ms 27 Mar 2025 753rd jessegyger 299 915 6ms 15 May 2024 754th jaredcrystal 🇺🇸 298 389 42ms 13 Dec 2018 755th TimCurwick 🇺🇸 298 451 330ms 27 Jan 2021 756th InigoK 🇺🇸 293 380 14ms 11 Jun 2023 757th CatsAreFluffy 293 381 21ms 14 Dec 2022 758th dokutan 292 822 1,310ms 1 Dec 2025 759th jhcole 291 383 13ms 25 Apr 2020 759th SniperSmiley 🇺🇸 291 383 13ms 18 Dec 2022 759th mbittner20 291 383 14ms 27 May 2023 762nd biinari 291 398 37ms 18 Mar 2018 763rd KevinMarquette 🇺🇸 291 461 326ms 8 Jun 2020 764th dokutan 291 1,387 127ms 1 Dec 2025 765th CommandLeo 🇮🇹 290 384 21ms 27 Nov 2025 766th dokutan 290 915 426ms 1 Dec 2025 767th scpchicken 🇵🇼 289 329 6ms 30 Jan 2023 768th qpwoeirut 289 385 13ms 11 Aug 2025 768th CaedenHarper 🇨🇦 289 385 34ms 3 Oct 2025 770th blaztoma 🇱🇹 289 386 20ms 4 Oct 2025 771st KatieLG 🇬🇧 289 469 692ms 14 Jan 2023 772nd Ashikpaul 🇮🇳 288 577 13ms 9 May 2021 773rd ZakkkkAttackkkk 🇵🇭 287 388 34ms 20 Sep 2023 773rd cros107 🇦🇺 287 388 15ms 11 Jun 2025 773rd retrohun 287 388 13ms 23 Jul 2025 776th abailey2020 🇺🇸 287 389 21ms 13 Dec 2020 777th commandz0 🇺🇸 286 390 21ms 26 Sep 2023 778th Waffle3z 286 405 35ms 6 Jul 2021 779th Bonjour27891 🇻🇳 285 391 21ms 13 Mar 2022 779th fgrosshans 🇫🇷 285 391 14ms 30 Mar 2022 781st davecame 284 392 12ms 24 Oct 2023 782nd Lv0Sys 🇵🇱 284 393 13ms 20 Feb 2026 783rd try-except-try-accept 🇹🇭 283 394 17ms 5 Jul 2022 783rd adamnielson42 🇺🇸 283 394 13ms 24 May 2023 785th AbhayAravinda 283 763 4ms 2 Jun 2020 786th msbranicky 282 372 671ms 16 Jan 2024 787th FortuiteMan 🇫🇷 282 395 19ms 7 Dec 2025 788th dokutan 282 1,149 1,345ms 1 Dec 2025 789th hughsimpson 281 265 182ms 8 Jul 2018 790th DrPiranoid 281 396 14ms 10 Oct 2022 790th Troon 281 396 20ms 19 Aug 2025 792nd jackkav 280 595 13ms 13 Apr 2018 792nd ereztaiar 🇮🇱 280 595 13ms 24 Mar 2025 794th knutae 🇳🇴 279 400 14ms 16 Nov 2021 795th martinnorling 🇸🇪 278 401 14ms 2 Mar 2022 796th bluebear94 277 269 153ms 23 Dec 2017 797th stefangimmillaro 277 402 13ms 10 Nov 2023 798th Indivicivet 277 403 24ms 30 Mar 2021 799th mtirado1 277 683 4ms 23 Dec 2022 800th commandz0 🇺🇸 276 380 693ms 1 Sep 2025 First Prev 721–800 of 1,080 Next Last
