The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 8 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 795th janbehrens 🇩🇪 626 105 10ms 17 Jun 2023 795th AlexanderFair 626 105 10ms 26 Jun 2023 795th fgrosshans 🇫🇷 626 105 10ms 17 Jul 2024 795th edsrzf 🇳🇿 626 105 9ms 22 Nov 2024 795th Babafaba 626 105 10ms 23 Nov 2025 806th annaproxy 625 126 121ms 15 Apr 2022 807th jared-hughes 625 147 441ms 24 Jun 2022 808th commandz0 🇺🇸 624 99 515ms 15 Jan 2024 809th didion0 🇺🇸 624 116 10ms 31 Jan 2022 809th fitzdotlol 🇺🇸 624 116 10ms 28 Mar 2022 811th Shanethegamer 🇺🇸 624 127 125ms 28 Apr 2022 812th Shanethegamer 🇺🇸 624 159 466ms 25 Sep 2025 813th orthoplex 🇨🇽 623 53 33ms 7 Oct 2020 814th elisherer 🇮🇱 623 77 3ms 20 Apr 2019 814th nephila-nacrea 🇬🇧 623 77 3ms 10 Dec 2020 816th GrayJoKing 🇦🇺 623 149 145ms 17 Oct 2025 817th guliyevemil1 🇦🇿 623 175 295ms 30 Jan 2021 818th Shanethegamer 🇺🇸 622 83 40ms 24 Jan 2024 819th Ripick 622 93 252ms 24 Jun 2025 820th MeWhenI 🇻🇦 622 126 156ms 17 Nov 2022 821st decorator-factory 620 106 9ms 24 May 2019 821st mosho-p 620 106 10ms 11 Oct 2022 821st Europe2048 620 106 10ms 21 Nov 2024 821st dirckvdende 620 106 10ms 9 Jul 2025 821st qpwoeirut 620 106 10ms 19 Nov 2025 826th ZakkkkAttackkkk 🇵🇭 618 125 1ms 15 Dec 2021 826th janbehrens 🇩🇪 618 125 2ms 20 Jul 2022 828th JDiLenarda 🇫🇷 618 129 1,294ms 2 Nov 2020 829th albanian-laundromat 617 123 80ms 9 Dec 2025 830th Herbert00709 🇵🇱 617 149 60ms 10 Mar 2024 831st cduerm 616 177 301ms 12 Nov 2020 832nd mossr 🇺🇸 615 94 337ms 24 Feb 2021 833rd garrisonhh 615 107 9ms 25 Nov 2020 833rd Fracture17 615 107 11ms 4 Apr 2023 833rd quimey 615 107 10ms 21 Jun 2023 836th SirFireball3521 613 74 136ms 21 Mar 2023 837th MeWhenI 🇻🇦 612 79 274ms 28 Jan 2023 838th galloj 🇨🇿 612 96 2ms 22 Apr 2024 839th ian-h-chamberlain 🇺🇸 611 152 135ms 18 Jul 2022 840th dokutan 611 163 110ms 12 Dec 2025 841st retrohun 610 95 1ms 22 Feb 2026 842nd dzhang314 609 108 10ms 13 Aug 2019 842nd cubed-guy 609 108 10ms 3 Apr 2022 842nd jakobkordez 🇸🇮 609 108 10ms 31 Oct 2022 842nd b10011 🇫🇮 609 108 10ms 7 Jan 2023 842nd cykim8811 609 108 10ms 9 Jul 2024 847th neihousaigaai 609 127 2ms 5 Apr 2021 848th Yewzir 🇧🇪 609 151 429ms 9 Feb 2024 849th MeWhenI 🇻🇦 609 152 7ms 12 Apr 2024 850th rgthree 608 119 9ms 5 Sep 2023 851st Shanethegamer 🇺🇸 607 125 82ms 16 Feb 2025 852nd Shanethegamer 🇺🇸 607 150 459ms 12 Dec 2022 853rd jacobly0 🇺🇸 606 109 1,284ms 17 Aug 2023 854th amazingalek 🇳🇴 606 142 436ms 21 Jan 2026 855th Ripick 605 131 397ms 16 Jul 2024 856th TheSecondComing123 605 152 456ms 25 days ago 857th frankgraziano 604 112 3ms 14 Feb 2026 858th gastropner 604 128 2ms 23 Dec 2020 858th Yewzir 🇧🇪 604 128 1ms 9 Feb 2024 860th Mr-Xcoder 603 109 10ms 17 Jun 2018 860th geofft 603 109 9ms 10 Dec 2020 860th Marsolo1 603 109 9ms 18 Apr 2023 860th TaserTheFox 🇺🇸 603 109 10ms 2 May 2023 860th smilesformiles3 603 109 10ms 14 Jun 2025 860th jacekwladzinski 603 109 9ms 5 Oct 2025 866th mintypython 603 120 9ms 18 Oct 2018 867th jerrandolph 602 181 285ms 16 Apr 2020 868th KatieLG 🇬🇧 601 143 393ms 30 Jul 2024 869th kmathis22 601 165 492ms 28 Oct 2025 870th rak1507 🇬🇧 600 55 32ms 21 Feb 2022 871st didroe 600 86 36ms 7 Nov 2024 871st plcc0 600 86 35ms 28 Dec 2025 873rd Babafaba 599 103 537ms 23 Nov 2025 874th pandapawskat 599 129 1ms 4 Oct 2021 875th Yewzir 🇧🇪 599 182 256ms 29 Oct 2023 876th SuperFola 599 228 46ms 4 days ago 877th Andre3582 598 110 9ms 27 Oct 2020 877th jacklynnepenick 598 110 16ms 20 Aug 2021 879th Shanethegamer 🇺🇸 598 121 11ms 28 Apr 2022 880th lahell 597 81 256ms 7 Jun 2020 First Prev 801–880 of 2,557 Next Last