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?
Diamonds 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 880th dcgjb 597 81 254ms 4 Jun 2024 882nd roavin 597 144 404ms 28 Jul 2022 883rd WillConker 595 156 230ms 25 Oct 2024 884th h3ra993huskp 🇯🇵 594 151 2,626ms 12 days ago 885th hiddicop 🇸🇪 593 87 35ms 27 Jan 2021 885th Irratix 🇳🇱 593 87 35ms 4 Mar 2022 887th gigaprofisi 🇺🇸 593 122 9ms 18 Jun 2025 888th dokutan 593 155 493ms 1 Feb 2026 889th MeWhenI 🇻🇦 592 81 34ms 15 Apr 2023 890th adoxography 592 111 12ms 3 Oct 2019 890th suchwise 592 111 9ms 29 Oct 2019 890th mortimervonchappuis 592 111 11ms 16 Mar 2020 890th luftj 592 111 9ms 9 Jul 2020 890th dgambit 592 111 9ms 5 May 2021 890th clementblaudeau 592 111 11ms 2 Jun 2021 890th knutae 🇳🇴 592 111 10ms 1 Dec 2021 890th JudeTyrrell 592 111 10ms 6 Oct 2024 890th WillConker 592 111 9ms 25 Oct 2024 899th DialFrost 🇸🇬 590 82 264ms 7 Jun 2024 900th czylabsonasa 🇭🇺 590 98 295ms 21 Oct 2021 901st elisherer 🇮🇱 589 77 126ms 20 Apr 2019 902nd MeWhenI 🇻🇦 589 91 4ms 16 Aug 2024 903rd Skepfyr 588 158 135ms 4 Jan 2020 904th TessSSBM 587 112 10ms 14 Oct 2019 904th OwenElliottDev 587 112 9ms 26 Jul 2020 904th BrenSchaap 587 112 10ms 21 Oct 2021 904th guilhem-roy 🇫🇷 587 112 11ms 25 Feb 2022 904th Mabeloid 🇳🇴 587 112 10ms 19 Sep 2024 904th nemoyatpeace 587 112 10ms 31 Dec 2025 910th DestyNova 🇮🇪 587 135 394ms 15 Aug 2022 911th 12Jeef 587 169 423ms 1 Sep 2023 911th yoshykai 587 169 414ms 30 Mar 2025 913th kdx2a 586 132 1ms 13 Feb 2025 914th Blendi-Goose 585 139 2ms 6 Feb 2026 915th itserasmus 584 124 10ms 25 Jan 2024 915th Protothor 584 124 13ms 17 days ago 917th skps2010 582 113 10ms 12 Jan 2019 917th Iluvatar 582 113 10ms 11 May 2020 917th Psirving 582 113 9ms 2 Aug 2020 917th constant-stranger 582 113 10ms 7 Feb 2022 917th CedricGebistorf 582 113 11ms 5 Mar 2022 917th draxler-h 582 113 9ms 13 Jan 2023 917th brimstonetrader 582 113 10ms 26 Mar 2024 917th ComradeSquirrel 582 113 10ms 15 hours ago 925th MeWhenI 🇻🇦 582 120 1ms 10 Oct 2023 926th prplz 🇦🇺 582 188 25ms 10 Jul 2021 927th MeWhenI 🇻🇦 581 121 162ms 3 Aug 2024 928th rak1507 🇬🇧 580 89 39ms 23 Sep 2021 928th KatieLG 🇬🇧 580 89 36ms 31 Dec 2025 930th MeWhenI 🇻🇦 580 157 453ms 5 Mar 2022 931st Mabeloid 🇳🇴 580 160 154ms 31 Oct 2025 932nd janbehrens 🇩🇪 580 171 417ms 20 Jul 2022 933rd DialFrost 🇸🇬 579 57 3ms 7 Feb 2024 934th janbehrens 🇩🇪 579 114 1,260ms 7 Apr 2023 935th weliveinhell 🇭🇹 579 125 9ms 24 Jan 2024 935th CaedenHarper 🇨🇦 579 125 10ms 31 Aug 2025 937th chunes3 🇺🇸 579 134 68ms 19 Sep 2023 938th yzhs 🇩🇪 579 136 120ms 25 Jun 2023 939th Shanethegamer 🇺🇸 578 159 446ms 29 Apr 2022 940th sk- 577 114 10ms 11 Sep 2020 940th SB-945 577 114 11ms 17 Apr 2024 940th FlorianCassayre 🇫🇷 577 114 11ms 24 May 2024 940th HumanoidCPU 577 114 10ms 9 May 2025 940th retrohun 577 114 10ms 22 Feb 2026 945th filharmonista 577 134 2ms 23 Nov 2019 945th slerpyyy 🇩🇪 577 134 2ms 3 Nov 2022 947th SirBogman 🇺🇸 577 330 12ms 23 Nov 2022 948th ForkKILLET 🇨🇳 575 126 10ms 17 Feb 2021 948th lukasmoellerch 575 126 10ms 28 Apr 2021 950th CaedenHarper 🇨🇦 574 110 1,068ms 9 Sep 2025 951st Shanethegamer 🇺🇸 574 139 122ms 31 Oct 2022 952nd duckyluuk 🇳🇱 574 220 2ms 28 Jan 2026 953rd olivermrose 🇺🇸 573 90 36ms 31 Oct 2021 954th prplz 🇦🇺 573 162 126ms 7 Jan 2020 954th Xzyaihni 573 162 164ms 16 Oct 2022 954th fantaize 573 162 136ms 16 days ago 957th Shanethegamer 🇺🇸 573 191 64ms 29 Apr 2022 958th fabi1511 572 115 9ms 1 May 2020 958th amollberg 🇸🇪 572 115 11ms 21 Jan 2022 958th weeble 572 115 10ms 23 Dec 2024 First Prev 881–960 of 2,561 Next Last