The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 2 days. Why not try and solve them ahead of time?
Calendar in all languages in chars. 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 Chars Time Submitted 81st edsrzf 🇳🇿 826 238 3ms 6 Jan 2026 82nd dokutan 825 201 140ms 8 Feb 2026 83rd bstrat 824 116 8ms 22 days ago 84th AlephSquirrel 824 141 46ms 24 Jan 2026 85th edsrzf 🇳🇿 823 256 1,399ms 17 Jan 2026 86th stefangimmillaro 822 161 1,608ms 7 Jan 2026 87th ovs-code 🇩🇪 820 280 153ms 19 Dec 2025 87th UnderKoen 🇳🇱 820 280 7ms 4 days ago 89th sean-niemann 🇺🇸 819 243 478ms 8 Jan 2026 90th Lv0Sys 🇵🇱 818 238 465ms 1 Mar 2026 91st CaedenHarper 🇨🇦 818 255 303ms 24 Dec 2025 92nd Steffan153 🇫🇮 816 159 6ms 20 Feb 2026 93rd rucin93 🇵🇱 816 223 3ms 27 Dec 2025 94th stefangimmillaro 816 322 163ms 8 Jan 2026 95th edsrzf 🇳🇿 815 227 136ms 3 Jan 2026 96th edsrzf 🇳🇿 813 239 5ms 2 Jan 2026 97th pardouin 🇫🇷 812 163 1,644ms 21 Dec 2025 98th edsrzf 🇳🇿 812 250 115ms 2 Jan 2026 99th 2bular 810 118 3ms 25 Oct 2025 100th edsrzf 🇳🇿 810 258 103ms 4 Jan 2026 101st emgordon154 808 241 460ms 12 Feb 2026 102nd edsrzf 🇳🇿 808 279 8ms 15 days ago 103rd GrayJoKing 🇦🇺 807 123 178ms 1 Jan 2026 104th error256 806 188 64ms 9 Feb 2026 105th edsrzf 🇳🇿 806 291 62ms 3 Jan 2026 106th ovs-code 🇩🇪 805 87 451ms 18 Dec 2025 107th rucin93 🇵🇱 805 145 14ms 31 May 2025 108th sean-niemann 🇺🇸 800 146 12ms 19 Dec 2025 109th MeWhenI 🇻🇦 800 360 437ms 10 days ago 110th albanian-laundromat 799 368 43ms 19 Jan 2026 111th edsrzf 🇳🇿 794 237 192ms 25 Jan 2026 112th albanian-laundromat 793 246 5ms 19 days ago 113th IanUtley 785 299 130ms 5 Feb 2026 114th Natanaelel 🇸🇪 778 54 33ms 14 days ago 115th AlephSquirrel 778 370 5ms 25 Jan 2026 116th CornerMercury 🇬🇧 775 416 37ms 2 Feb 2026 117th MeWhenI 🇻🇦 775 422 267ms 5 days ago 118th kg583 🇺🇸 774 251 7ms 21 Dec 2025 119th emgordon154 770 518 1,704ms 7 Jan 2026 120th canissimia 🇦🇶 770 537 4ms 6 days ago 121st emgordon154 769 549 1,550ms 1 Mar 2026 122nd snoozingnewt 🇨🇦 767 615 47ms 18 Feb 2026 123rd Yax42 🇫🇷 766 204 464ms 18 Dec 2025 124th snyderek 🇺🇸 766 235 436ms 29 Dec 2025 125th Natanaelel 🇸🇪 766 300 144ms 2 Jan 2026 126th snoozingnewt 🇨🇦 762 345 709ms 22 days ago 127th Lv0Sys 🇵🇱 761 274 308ms 1 Mar 2026 128th HumanoidCPU 745 94 436ms 30 Dec 2025 129th JOrE20 744 157 12ms 29 Dec 2025 130th HumanoidCPU 741 98 17ms 30 Dec 2025 131st SirBogman 🇺🇸 741 129 3ms 8 Jan 2026 132nd JDiLenarda 🇫🇷 740 285 1,479ms 30 Jan 2026 133rd btnlq 734 99 16ms 29 Dec 2024 133rd 5cw 🇺🇸 734 99 16ms 4 May 2025 133rd 4atj 734 99 17ms 23 Jun 2025 133rd commandz0 🇺🇸 734 99 16ms 27 Aug 2025 133rd duckyluuk 🇳🇱 734 99 16ms 12 Dec 2025 133rd ovs-code 🇩🇪 734 99 16ms 18 Dec 2025 133rd bizy-coder 734 99 16ms 19 Dec 2025 133rd blaztoma 🇱🇹 734 99 16ms 19 Dec 2025 133rd Emutis 🇱🇹 734 99 16ms 20 Dec 2025 133rd rucin93 🇵🇱 734 99 16ms 21 Dec 2025 133rd CaedenHarper 🇨🇦 734 99 16ms 23 Dec 2025 133rd error256 734 99 16ms 1 Jan 2026 133rd nwellnhof 🇩🇪 734 99 16ms 1 Jan 2026 133rd FortuiteMan 🇫🇷 734 99 16ms 1 Jan 2026 133rd stefangimmillaro 734 99 16ms 7 Jan 2026 133rd bzijlema 🇳🇱 734 99 16ms 7 Jan 2026 133rd D-MOVE 🇵🇭 734 99 16ms 20 Jan 2026 133rd esmaycat 734 99 15ms 1 Feb 2026 133rd Lv0Sys 🇵🇱 734 99 17ms 21 Feb 2026 133rd Languag3 734 99 15ms 28 Feb 2026 133rd Aquateraneal 🇺🇸 734 99 16ms 22 days ago 133rd MeWhenI 🇻🇦 734 99 17ms 15 days ago 155th amazingalek 🇳🇴 731 214 448ms 4 Jan 2026 156th sean-niemann 🇺🇸 731 216 3ms 6 days ago 157th nwellnhof 🇩🇪 729 113 521ms 4 Jan 2026 158th FortuiteMan 🇫🇷 724 398 20ms 23 Feb 2026 159th edsrzf 🇳🇿 720 217 442ms 5 Jan 2026 160th bstrat 720 319 8ms 11 days ago First Prev 81–160 of 368 Next Last
