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?
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 714th Mabeloid 🇳🇴 253 774 3ms 21 Sep 2024 714th xyangst 253 774 3ms 12 Oct 2024 714th CaedenHarper 🇨🇦 253 774 2ms 22 Jan 2025 714th ehulinsky 🇺🇸 253 774 3ms 26 Mar 2025 725th JOrE20 252 382 153ms 11 Feb 2026 726th Shanethegamer 🇺🇸 251 782 71ms 1 Sep 2023 726th HumanoidCPU 251 782 66ms 27 May 2024 726th dokutan 251 782 71ms 30 Jul 2024 726th Mabeloid 🇳🇴 251 782 69ms 21 Sep 2024 726th CaedenHarper 🇨🇦 251 782 65ms 22 Jan 2025 731st AbhilashaTandon 249 492 10ms 21 Sep 2023 732nd msbranicky 248 590 1ms 28 Sep 2023 733rd blaztoma 🇱🇹 247 540 418ms 6 Sep 2025 734th Yewzir 🇧🇪 247 578 2ms 27 Mar 2024 735th KatieLG 🇬🇧 247 776 5ms 11 Dec 2023 735th Shanethegamer 🇺🇸 247 776 5ms 11 Dec 2023 735th MeWhenI 🇻🇦 247 776 5ms 13 Dec 2023 735th theunofficialcoder 247 776 6ms 12 Jan 2024 735th HumanoidCPU 247 776 5ms 16 Apr 2024 735th KatieLG-Transpiler 🇬🇧 247 776 7ms 16 Aug 2024 735th Mabeloid 🇳🇴 247 776 5ms 21 Sep 2024 735th CaedenHarper 🇨🇦 247 776 5ms 20 Jan 2025 735th Babafaba 247 776 6ms 29 Oct 2025 735th JOrE20 247 776 6ms 10 Feb 2026 745th KatieLG 🇬🇧 247 792 69ms 2 Sep 2023 746th fgrosshans 🇫🇷 246 498 15ms 1 Sep 2023 747th neihousaigaai 244 502 9ms 12 Feb 2024 748th isaiah0311 🇺🇸 243 308 2ms 30 Jan 2026 749th dokutan 242 588 361ms 24 Sep 2025 750th dokutan 242 791 122ms 18 Oct 2024 751st KatieLG-Transpiler 🇬🇧 242 809 648ms 2 Sep 2023 752nd MeWhenI 🇻🇦 241 779 8ms 1 Sep 2023 752nd Shanethegamer 🇺🇸 241 779 9ms 1 Sep 2023 752nd HumanoidCPU 241 779 9ms 16 Apr 2024 752nd Mabeloid 🇳🇴 241 779 9ms 21 Sep 2024 752nd dokutan 241 779 9ms 18 Oct 2024 752nd CaedenHarper 🇨🇦 241 779 10ms 22 Jan 2025 758th Shanethegamer 🇺🇸 241 795 109ms 1 Sep 2023 758th KatieLG 🇬🇧 241 795 114ms 2 Sep 2023 758th KatieLG-Transpiler 🇬🇧 241 795 109ms 2 Sep 2023 758th msbranicky 241 795 111ms 11 Sep 2023 758th HumanoidCPU 241 795 104ms 16 Apr 2024 758th Mabeloid 🇳🇴 241 795 123ms 21 Sep 2024 758th CaedenHarper 🇨🇦 241 795 109ms 21 Jan 2025 758th JOrE20 241 795 118ms 10 Feb 2026 766th msbranicky 240 596 2ms 10 Oct 2023 767th snoozingnewt 🇨🇦 240 798 105ms 4 Sep 2023 768th MeWhenI 🇻🇦 240 800 109ms 1 Sep 2023 769th MeWhenI 🇻🇦 237 776 5ms 1 Sep 2023 769th Shanethegamer 🇺🇸 237 776 5ms 1 Sep 2023 769th KatieLG 🇬🇧 237 776 5ms 2 Sep 2023 769th KatieLG-Transpiler 🇬🇧 237 776 5ms 2 Sep 2023 769th scpchicken 🇵🇼 237 776 5ms 14 Nov 2023 769th HumanoidCPU 237 776 5ms 4 May 2024 769th dokutan 237 776 5ms 24 Jun 2024 769th Mabeloid 🇳🇴 237 776 5ms 21 Sep 2024 769th CaedenHarper 🇨🇦 237 776 5ms 20 Jan 2025 778th Jacob385 237 2,150 5ms 4 Aug 2024 779th dokutan 236 506 126ms 27 Dec 2025 780th snoozingnewt 🇨🇦 235 781 5ms 5 Sep 2023 781st KatieLG 🇬🇧 235 797 9ms 2 Sep 2023 781st KatieLG-Transpiler 🇬🇧 235 797 9ms 2 Sep 2023 783rd msbranicky 233 678 1,676ms 17 Sep 2025 784th cbrt-x 233 821 109ms 9 Oct 2023 785th scpchicken 🇵🇼 229 454 5ms 1 Nov 2023 786th BREMAUCY 🇫🇷 227 329 2ms 1 Nov 2025 787th retrohun 227 563 2ms 11 days ago 788th bac0id 227 587 375ms 9 Jan 2025 789th msbranicky 227 635 284ms 1 Sep 2023 790th KatieLG-Transpiler 🇬🇧 227 2,253 5ms 2 Sep 2023 791st FortuiteMan 🇫🇷 225 231 56ms 3 Dec 2025 792nd dokutan 225 569 2ms 6 Jun 2024 793rd KatieLG 🇬🇧 225 2,269 5ms 28 Sep 2024 794th alphafalfa 224 572 15ms 1 Aug 2025 795th HumanoidCPU 224 809 6ms 12 Nov 2025 795th dokutan 224 809 6ms 21 Feb 2026 795th CaedenHarper 🇨🇦 224 809 6ms 22 Feb 2026 798th thisishowmymindworks 🇳🇴 221 557 9ms 15 Jun 2024 798th voytxt 🇨🇿 221 557 8ms 7 Aug 2024 800th dokutan 221 584 801ms 10 Dec 2025 First Prev 721–800 of 1,441 Next Last