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?
Rijndael S-box 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 713th xyangst 253 774 3ms 12 Oct 2024 713th CaedenHarper 🇨🇦 253 774 2ms 22 Jan 2025 713th ehulinsky 🇺🇸 253 774 3ms 26 Mar 2025 724th JOrE20 252 382 153ms 11 Feb 2026 725th Shanethegamer 🇺🇸 251 782 71ms 1 Sep 2023 725th HumanoidCPU 251 782 66ms 27 May 2024 725th dokutan 251 782 71ms 30 Jul 2024 725th Mabeloid 🇳🇴 251 782 69ms 21 Sep 2024 725th CaedenHarper 🇨🇦 251 782 65ms 22 Jan 2025 730th AbhilashaTandon 249 492 10ms 21 Sep 2023 731st msbranicky 248 590 1ms 28 Sep 2023 732nd blaztoma 🇱🇹 247 540 418ms 6 Sep 2025 733rd Yewzir 🇧🇪 247 578 2ms 27 Mar 2024 734th KatieLG 🇬🇧 247 776 5ms 11 Dec 2023 734th Shanethegamer 🇺🇸 247 776 5ms 11 Dec 2023 734th MeWhenI 🇻🇦 247 776 5ms 13 Dec 2023 734th theunofficialcoder 247 776 6ms 12 Jan 2024 734th HumanoidCPU 247 776 5ms 16 Apr 2024 734th KatieLG-Transpiler 🇬🇧 247 776 7ms 16 Aug 2024 734th Mabeloid 🇳🇴 247 776 5ms 21 Sep 2024 734th CaedenHarper 🇨🇦 247 776 5ms 20 Jan 2025 734th Babafaba 247 776 6ms 29 Oct 2025 734th JOrE20 247 776 6ms 10 Feb 2026 744th KatieLG 🇬🇧 247 792 69ms 2 Sep 2023 745th fgrosshans 🇫🇷 246 498 15ms 1 Sep 2023 746th neihousaigaai 244 502 9ms 12 Feb 2024 747th isaiah0311 🇺🇸 243 308 2ms 30 Jan 2026 748th dokutan 242 588 361ms 24 Sep 2025 749th dokutan 242 791 122ms 18 Oct 2024 750th KatieLG-Transpiler 🇬🇧 242 809 648ms 2 Sep 2023 751st MeWhenI 🇻🇦 241 779 8ms 1 Sep 2023 751st Shanethegamer 🇺🇸 241 779 9ms 1 Sep 2023 751st HumanoidCPU 241 779 9ms 16 Apr 2024 751st Mabeloid 🇳🇴 241 779 9ms 21 Sep 2024 751st dokutan 241 779 9ms 18 Oct 2024 751st CaedenHarper 🇨🇦 241 779 10ms 22 Jan 2025 757th Shanethegamer 🇺🇸 241 795 109ms 1 Sep 2023 757th KatieLG 🇬🇧 241 795 114ms 2 Sep 2023 757th KatieLG-Transpiler 🇬🇧 241 795 109ms 2 Sep 2023 757th msbranicky 241 795 111ms 11 Sep 2023 757th HumanoidCPU 241 795 104ms 16 Apr 2024 757th Mabeloid 🇳🇴 241 795 123ms 21 Sep 2024 757th CaedenHarper 🇨🇦 241 795 109ms 21 Jan 2025 757th JOrE20 241 795 118ms 10 Feb 2026 765th msbranicky 240 596 2ms 10 Oct 2023 766th snoozingnewt 🇨🇦 240 798 105ms 4 Sep 2023 767th MeWhenI 🇻🇦 240 800 109ms 1 Sep 2023 768th MeWhenI 🇻🇦 237 776 5ms 1 Sep 2023 768th Shanethegamer 🇺🇸 237 776 5ms 1 Sep 2023 768th KatieLG 🇬🇧 237 776 5ms 2 Sep 2023 768th KatieLG-Transpiler 🇬🇧 237 776 5ms 2 Sep 2023 768th scpchicken 🇵🇼 237 776 5ms 14 Nov 2023 768th HumanoidCPU 237 776 5ms 4 May 2024 768th dokutan 237 776 5ms 24 Jun 2024 768th Mabeloid 🇳🇴 237 776 5ms 21 Sep 2024 768th CaedenHarper 🇨🇦 237 776 5ms 20 Jan 2025 777th Jacob385 237 2,150 5ms 4 Aug 2024 778th dokutan 236 506 126ms 27 Dec 2025 779th snoozingnewt 🇨🇦 235 781 5ms 5 Sep 2023 780th KatieLG 🇬🇧 235 797 9ms 2 Sep 2023 780th KatieLG-Transpiler 🇬🇧 235 797 9ms 2 Sep 2023 782nd msbranicky 233 678 1,676ms 17 Sep 2025 783rd cbrt-x 233 821 109ms 9 Oct 2023 784th scpchicken 🇵🇼 229 454 5ms 1 Nov 2023 785th BREMAUCY 🇫🇷 227 329 2ms 1 Nov 2025 786th retrohun 227 563 2ms 10 days ago 787th bac0id 227 587 375ms 9 Jan 2025 788th msbranicky 227 635 284ms 1 Sep 2023 789th KatieLG-Transpiler 🇬🇧 227 2,253 5ms 2 Sep 2023 790th FortuiteMan 🇫🇷 225 231 56ms 3 Dec 2025 791st dokutan 225 569 2ms 6 Jun 2024 792nd KatieLG 🇬🇧 225 2,269 5ms 28 Sep 2024 793rd alphafalfa 224 572 15ms 1 Aug 2025 794th HumanoidCPU 224 809 6ms 12 Nov 2025 794th dokutan 224 809 6ms 21 Feb 2026 794th CaedenHarper 🇨🇦 224 809 6ms 22 Feb 2026 797th thisishowmymindworks 🇳🇴 221 557 9ms 15 Jun 2024 797th voytxt 🇨🇿 221 557 8ms 7 Aug 2024 799th dokutan 221 584 801ms 10 Dec 2025 800th gifti258 220 585 187ms 13 Sep 2023 First Prev 721–800 of 1,440 Next Last