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 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 721st DialFrost 🇸🇬 470 404 16ms 24 Feb 2024 722nd FusionAtom360 469 405 19ms 4 Jan 2026 723rd d4rkne55 469 584 6ms 23 Feb 2018 724th aalec 468 406 21ms 22 Nov 2025 725th argusdusty 🇺🇸 467 407 19ms 1 Jan 2021 726th Ashikpaul 🇮🇳 466 577 13ms 9 May 2021 727th emgordon154 465 409 20ms 21 Sep 2025 728th Neofox 463 592 6ms 18 Nov 2017 729th msbranicky 462 372 671ms 16 Jan 2024 730th EnTerr 461 412 20ms 8 Sep 2024 730th JOrE20 461 412 14ms 25 Dec 2025 732nd KatieLG 🇬🇧 461 754 17ms 25 May 2024 733rd Shanethegamer 🇺🇸 461 862 45ms 23 Dec 2021 734th jotslo 🇬🇧 458 415 14ms 12 Jul 2021 735th richard-oelze 🇩🇪 457 416 20ms 19 Apr 2021 735th rollershutter 457 416 20ms 17 Apr 2024 737th Schmitt-Very-Cool 457 525 596ms 3 Oct 2025 738th msbranicky 456 203 46ms 25 Dec 2023 739th jakobkordez 🇸🇮 455 418 13ms 30 Nov 2022 740th Europe2048 454 419 13ms 2 Dec 2024 741st lgastako 453 655 208ms 2 Aug 2019 742nd commandz0 🇺🇸 452 380 693ms 1 Sep 2025 742nd dokutan 452 380 466ms 5 Feb 2026 744th jackkav 452 595 13ms 13 Apr 2018 744th ereztaiar 🇮🇱 452 595 13ms 24 Mar 2025 746th inverseLorentz 🇦🇺 451 421 15ms 22 Aug 2022 746th Babafaba 451 421 13ms 29 Oct 2025 748th Feluxus 451 532 425ms 15 Nov 2021 749th rustykitty 🇺🇸 450 422 19ms 19 days ago 750th AdamMorris377 449 423 20ms 29 Sep 2024 751st dokutan 447 226 43ms 25 Aug 2024 752nd JunkIce 447 425 20ms 17 Jan 2025 753rd northvandrew 447 553 342ms 24 Sep 2021 754th CaedenHarper 🇨🇦 446 385 505ms 6 Feb 2026 755th eiburns 444 428 20ms 23 Oct 2023 755th ImpressedByRocks 444 428 14ms 26 Jul 2024 757th TheAristos 443 429 14ms 30 Oct 2019 758th Mabeloid 🇳🇴 442 389 721ms 4 May 2025 759th alangodfrey 442 430 14ms 18 Feb 2019 760th snoozingnewt 🇨🇦 442 543 390ms 24 Sep 2025 761st retrohun 441 432 6ms 23 Aug 2025 762nd D1CED 441 699 18ms 17 Nov 2021 763rd vaughad 440 308 895ms 22 Jan 2020 764th KatieLG 🇬🇧 440 432 20ms 8 Dec 2020 764th albanian-laundromat 440 432 121ms 6 Mar 2025 766th msrawson 439 433 14ms 28 Aug 2018 767th croc54 438 434 14ms 16 Jan 2025 768th madex 🇩🇪 438 545 39ms 12 Jun 2024 769th inventshah 436 437 132ms 27 Aug 2022 770th amollberg 🇸🇪 435 437 21ms 22 Jan 2022 770th za3k 435 437 14ms 12 Oct 2022 772nd KatieLG 🇬🇧 433 409 4ms 12 May 2021 773rd GameChaos 433 439 19ms 8 Dec 2020 773rd BREMAUCY 🇫🇷 433 439 20ms 15 Nov 2024 775th petroselo 432 440 22ms 29 Dec 2021 776th papachan 431 215 25ms 12 Dec 2023 777th nstearns96 🇬🇧 431 441 14ms 25 Oct 2024 778th rvdnieuwendijk 🇳🇱 431 573 283ms 30 Jul 2020 779th AbhayAravinda 431 763 4ms 2 Jun 2020 780th cellobix 430 442 21ms 15 Aug 2019 780th geofft 430 442 13ms 11 Dec 2020 782nd MeWhenI 🇻🇦 430 690 234ms 6 Nov 2023 783rd MeWhenI 🇻🇦 425 619 25ms 15 Aug 2024 784th timchu 420 453 14ms 4 Mar 2021 784th twocatsinatrenchcoat 420 453 14ms 18 Nov 2022 784th AstroOrbis 420 453 13ms 12 Jul 2025 787th bwat2 420 572 422ms 24 May 2022 788th yokasuretsu 419 454 15ms 30 Nov 2021 788th Bonjour27891 🇻🇳 419 454 21ms 13 Mar 2022 788th madex 🇩🇪 419 454 20ms 9 Jul 2024 791st hughsimpson 418 297 182ms 8 Jul 2018 792nd rowboat1 418 455 15ms 11 Apr 2020 793rd yuchuehw 418 574 456ms 1 Jan 2024 794th Babafaba 417 412 647ms 29 Oct 2025 795th neel11235813 417 456 13ms 23 Jan 2023 796th MeWhenI 🇻🇦 417 543 113ms 6 Nov 2023 797th ceeb9 416 457 14ms 8 Jun 2023 798th damoose717 415 458 13ms 25 May 2025 798th zgialor-lab 415 458 19ms 15 days ago 800th joshuaxie8 415 579 462ms 9 Jul 2025 First Prev 721–800 of 1,084 Next Last
