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    The Connect Four hole will go live in approximately . Why not try and solve it ahead of time?

    Recent Solutions

    Hole Golfer Bytes Time Submitted
    ln 2 retrohun 1,007
    Connect Four madex 148
    Prime Numbers (Long) vargaeszter 90
    Prime Numbers vargaeszter 88
    γ Haksell 1,007
    Kolakoski Constant scpchicken 78
    Tic-tac-toe scpchicken 54
    99 Bottles of Beer vargaeszter 399
    Connect Four scpchicken 145
    Game of Life scpchicken 🥉 84
    Minesweeper scpchicken 🥇 57
    Reversi scpchicken 76
    Ten-pin Bowling scpchicken 116
    Topological Sort scpchicken 🥉 56
    Fibonacci vargaeszter 68
    Pangram Grep denkyuu1 43
    brainfuck iczelia 111
    Roman to Arabic denkyuu1 211
    ASCII Table denkyuu1 103
    Look and Say denkyuu1 46
    Evil Numbers (Long) retrohun 37
    Multitap Input denkyuu1 76
    Tutorial zgialor-lab 33
    Sudoku (Fill-in) codereport 230
    Polyominoes Herbert00709 3,568
    Polyominoes Openstreetmapler 3,568
    Alphabetic Numbers CaedenHarper 3,899
    τ codereport 29
    ln 2 codereport 31
    ROT13 edsrzf 🥇 32
    Polyominoes pardouin 184
    Fibonacci tungstengmd 48
    Abundant Numbers (Long) scpchicken 51
    Abundant Numbers scpchicken 51
    Tutorial whoashish115 33
    Polyominoes jared-hughes 3,568
    Card Number Validation scpchicken 54
    Polyominoes retrohun 3,568
    Reversi oaiqjuy 316
    Polyominoes oaiqjuy 687
    τ oaiqjuy 42
    Alphabetic Numbers saito-ta 💎 103
    Leap Years Steffan153 🥇 29
    Polyominoes madex 432
    Polyominoes Natanaelel 150
    Polyominoes aksyristos 3,568
    Polyominoes bitsandbeyond 797
    Polyominoes rucin93 3,582
    Polyominoes GolfingSuccess 3,568
    Polyominoes KasperKivimaeki 3,568
    Farey Sequence scpchicken 68
    Gijswijt’s Sequence scpchicken 🥉 50
    Catalan’s Constant sisyphus-ppcg 75
    Forsyth–Edwards Notation scpchicken 67
    Hexdump scpchicken 89
    Morse Decoder scpchicken 🥉 135
    Van Eck Sequence scpchicken 48
    Rectangle Fill scpchicken 653
    Tower of Hanoi sisyphus-ppcg 48
    Taxicab Numbers sisyphus-ppcg 🥈 62
    Van Eck Sequence sisyphus-ppcg 🥇 33
    Continued Fractions sisyphus-ppcg 🥈 83
    24 Game scpchicken 🥉 279
    Semiprime Numbers scpchicken 90
    Sphenic Numbers scpchicken 455
    ROT13 LostSyntax21 35
    Continued Fractions scpchicken 95
    Proximity Grid scpchicken 85
    Leap Years denkyuu1 35
    CSS Colors scpchicken 683
    Ordinal Numbers scpchicken 41
    Seven Segment scpchicken 91
    Arrows scpchicken 94
    Ulam Sequence HumanoidCPU 1,097
    Collatz scpchicken 54
    Kolakoski Sequence scpchicken 41
    Alphabetic Numbers KatieLG 3,019
    Leap Years not-a-pokemon 47
    Alphabetic Numbers dokutan 2,661
    PalindromemordnilaP Lydxn 🥇 40
    Ulam Sequence scpchicken 56
    Ulam Sequence Shanethegamer 1,097
    PalindromemordnilaP sisyphus-ppcg 🥇 40
    Prime Numbers denkyuu1 47
    √2 iczelia 🥇 27
    Taxicab Numbers dokutan 4,164
    Gray Code Decoder scpchicken 42
    Vampire Numbers scpchicken 127
    Intersection scpchicken 105
    Pernicious Numbers (Long) scpchicken 47
    Fizz Buzz janleigh 47
    99 Bottles of Beer HumanoidCPU 518
    Roman to Arabic HumanoidCPU 189
    Arabic to Roman HumanoidCPU 210
    Prime Numbers HumanoidCPU 57
    Prime Numbers (Long) HumanoidCPU 58
    Kolakoski Sequence HumanoidCPU 126
    Pascal’s Triangle HumanoidCPU 179
    Taxicab Numbers HumanoidCPU 249
    Catalan Numbers HumanoidCPU 78