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 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 dokutan 675 273 79ms 2 days ago 659th MeWhenI 🇻🇦 674 110 39ms 29 Apr 2025 660th AlephSquirrel 673 49 38ms 28 Jul 2022 660th Natanaelel 🇸🇪 673 49 3ms 20 Jul 2023 660th lifthrasiir 🇰🇷 673 49 2ms 28 Nov 2024 660th emgordon154 673 49 2ms 18 Nov 2025 664th eddiesmithxyz 673 117 122ms 15 Jan 2023 665th elgan65536 🇺🇸 673 138 131ms 22 Oct 2023 666th Phil-RGOMEGA 672 121 2ms 31 May 2023 667th prplz 🇦🇺 672 137 526ms 20 Oct 2020 668th Feniske 🇫🇷 671 72 265ms 10 Nov 2023 669th Yewzir 🇧🇪 671 92 570ms 4 Feb 2024 670th Indivicivet 671 98 9ms 11 Mar 2021 670th IshanPanpaliya 671 98 10ms 6 Oct 2022 670th celiendonze 🇨🇭 671 98 10ms 18 Apr 2023 670th chartung17 671 98 11ms 31 Dec 2023 670th Shanethegamer 🇺🇸 671 98 12ms 24 Jan 2024 670th cardosoo 671 98 10ms 6 Oct 2024 670th Artemis21 🇬🇧 671 98 10ms 21 Dec 2024 670th andrewjc2000 671 98 9ms 2 Jul 2025 670th Nhan-TRANvan_keyloop 671 98 10ms 20 Aug 2025 670th countlpaul-dotcom 671 98 10ms 19 Oct 2025 680th error256 671 113 74ms 28 Jun 2024 681st aksyristos 670 77 35ms 31 Jan 2023 681st tatzyr 🇯🇵 670 77 37ms 10 Dec 2024 681st fuzzylojik-golf 🇺🇸 670 77 36ms 2 hours ago 684th primo-ppcg 🇹🇭 670 117 151ms 1 May 2023 685th MeWhenI 🇻🇦 670 119 123ms 15 Oct 2022 686th aposteriorist 🇨🇦 670 136 432ms 4 Mar 2022 687th lukechampine 669 163 290ms 19 Apr 2020 687th MeWhenI 🇻🇦 669 163 316ms 10 Feb 2023 689th clockworknazo 667 87 2ms 15 Nov 2022 690th kops-cg 667 118 133ms 14 Apr 2021 691st Shanethegamer 🇺🇸 667 138 103ms 29 Apr 2022 692nd Grrisly 666 116 1ms 7 Nov 2023 693rd MateuszPietrzak 🇵🇱 666 138 2,882ms 17 Nov 2023 694th dokutan 665 87 326ms 30 Apr 2024 695th MeWhenI 🇻🇦 664 93 375ms 17 Jan 2024 695th albanian-laundromat 664 93 542ms 5 Oct 2025 697th drew-loukusa 664 99 10ms 26 May 2020 697th Secozzi 664 99 11ms 20 Oct 2020 697th seanshpark 664 99 10ms 18 Dec 2020 697th soalyer 664 99 9ms 9 Nov 2021 697th CodyMiner 664 99 10ms 14 Nov 2021 697th MichalMarsalek 🇨🇿 664 99 9ms 23 Oct 2022 697th logvp 664 99 10ms 6 Oct 2024 697th BREMAUCY 🇫🇷 664 99 10ms 7 Aug 2025 697th cros107 🇦🇺 664 99 10ms 2 Jan 2026 697th Pyroan 664 99 10ms 5 Jan 2026 707th stefangimmillaro 664 109 9ms 17 Oct 2023 707th KrausRaus 🇺🇸 664 109 8ms 13 Dec 2023 707th olleicua 🇺🇸 664 109 9ms 5 Feb 2024 707th junkondo-jp 664 109 10ms 30 Jun 2024 707th targrik 664 109 14ms 8 Jun 2025 707th Yax42 🇫🇷 664 109 12ms 20 Jan 2026 713th TomvdPeet 662 96 5ms 4 Dec 2025 714th bendapootie 661 117 2ms 10 Jul 2020 715th dokutan 660 136 2,607ms 15 Jan 2026 716th PiterAnnema 658 100 10ms 23 Mar 2022 716th neihousaigaai 658 100 10ms 17 Apr 2022 716th Heathcorp 🇦🇺 658 100 12ms 2 Dec 2022 716th aksyristos 658 100 9ms 2 Feb 2023 716th 5quiwyrm 658 100 11ms 27 Jul 2023 First Prev 641–720 of 2,556 Next Last
