The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 7 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 641st bzijlema 🇳🇱 681 160 292ms 30 Jan 2024 642nd KatieLG 🇬🇧 678 91 398ms 3 Aug 2025 642nd emgordon154 678 91 382ms 11 Feb 2026 644th davitf 678 97 10ms 6 Jul 2020 644th mokymok 🇺🇸 678 97 9ms 17 Nov 2021 644th jdw1023 678 97 11ms 26 Apr 2022 644th Bubbler-4 678 97 10ms 2 Nov 2022 644th rollershutter 678 97 10ms 30 Jan 2024 644th Powerroff 678 97 10ms 4 May 2024 644th plcc0 678 97 10ms 5 Mar 2025 644th emgordon154 678 97 10ms 7 Jun 2025 652nd RockOfStone 678 120 2ms 9 Mar 2024 653rd verticallity 678 137 153ms 6 Apr 2022 654th lukegustafson 🇺🇸 677 107 10ms 24 Jun 2024 655th janbehrens 🇩🇪 677 127 423ms 17 Apr 2025 655th MeWhenI 🇻🇦 677 127 397ms 19 Jun 2025 657th minetoblend 675 133 2,742ms 9 Oct 2025 658th MeWhenI 🇻🇦 674 110 39ms 29 Apr 2025 659th AlephSquirrel 673 49 38ms 28 Jul 2022 659th Natanaelel 🇸🇪 673 49 3ms 20 Jul 2023 659th lifthrasiir 🇰🇷 673 49 2ms 28 Nov 2024 659th emgordon154 673 49 2ms 18 Nov 2025 663rd eddiesmithxyz 673 117 122ms 15 Jan 2023 664th elgan65536 🇺🇸 673 138 131ms 22 Oct 2023 665th Phil-RGOMEGA 672 121 2ms 31 May 2023 666th prplz 🇦🇺 672 137 526ms 20 Oct 2020 667th Feniske 🇫🇷 671 72 265ms 10 Nov 2023 668th Yewzir 🇧🇪 671 92 570ms 4 Feb 2024 669th Indivicivet 671 98 9ms 11 Mar 2021 669th IshanPanpaliya 671 98 10ms 6 Oct 2022 669th celiendonze 🇨🇭 671 98 10ms 18 Apr 2023 669th chartung17 671 98 11ms 31 Dec 2023 669th Shanethegamer 🇺🇸 671 98 12ms 24 Jan 2024 669th cardosoo 671 98 10ms 6 Oct 2024 669th Artemis21 🇬🇧 671 98 10ms 21 Dec 2024 669th andrewjc2000 671 98 9ms 2 Jul 2025 669th Nhan-TRANvan_keyloop 671 98 10ms 20 Aug 2025 669th countlpaul-dotcom 671 98 10ms 19 Oct 2025 679th error256 671 113 74ms 28 Jun 2024 680th aksyristos 670 77 35ms 31 Jan 2023 680th tatzyr 🇯🇵 670 77 37ms 10 Dec 2024 680th fuzzylojik-golf 🇺🇸 670 77 36ms 6 hours ago 683rd primo-ppcg 🇹🇭 670 117 151ms 1 May 2023 684th MeWhenI 🇻🇦 670 119 123ms 15 Oct 2022 685th aposteriorist 🇨🇦 670 136 432ms 4 Mar 2022 686th lukechampine 669 163 290ms 19 Apr 2020 686th MeWhenI 🇻🇦 669 163 316ms 10 Feb 2023 688th clockworknazo 667 87 2ms 15 Nov 2022 689th kops-cg 667 118 133ms 14 Apr 2021 690th Shanethegamer 🇺🇸 667 138 103ms 29 Apr 2022 691st Grrisly 666 116 1ms 7 Nov 2023 692nd MateuszPietrzak 🇵🇱 666 138 2,882ms 17 Nov 2023 693rd dokutan 665 87 326ms 30 Apr 2024 694th MeWhenI 🇻🇦 664 93 375ms 17 Jan 2024 694th albanian-laundromat 664 93 542ms 5 Oct 2025 696th drew-loukusa 664 99 10ms 26 May 2020 696th Secozzi 664 99 11ms 20 Oct 2020 696th seanshpark 664 99 10ms 18 Dec 2020 696th soalyer 664 99 9ms 9 Nov 2021 696th CodyMiner 664 99 10ms 14 Nov 2021 696th MichalMarsalek 🇨🇿 664 99 9ms 23 Oct 2022 696th logvp 664 99 10ms 6 Oct 2024 696th BREMAUCY 🇫🇷 664 99 10ms 7 Aug 2025 696th cros107 🇦🇺 664 99 10ms 2 Jan 2026 696th Pyroan 664 99 10ms 5 Jan 2026 706th stefangimmillaro 664 109 9ms 17 Oct 2023 706th KrausRaus 🇺🇸 664 109 8ms 13 Dec 2023 706th olleicua 🇺🇸 664 109 9ms 5 Feb 2024 706th junkondo-jp 664 109 10ms 30 Jun 2024 706th targrik 664 109 14ms 8 Jun 2025 706th Yax42 🇫🇷 664 109 12ms 20 Jan 2026 712th TomvdPeet 662 96 5ms 4 Dec 2025 713th bendapootie 661 117 2ms 10 Jul 2020 714th dokutan 660 136 2,607ms 15 Jan 2026 715th PiterAnnema 658 100 10ms 23 Mar 2022 715th neihousaigaai 658 100 10ms 17 Apr 2022 715th Heathcorp 🇦🇺 658 100 12ms 2 Dec 2022 715th aksyristos 658 100 9ms 2 Feb 2023 715th 5quiwyrm 658 100 11ms 27 Jul 2023 715th madex 🇩🇪 658 100 10ms 9 Jul 2024 First Prev 641–720 of 2,558 Next Last
