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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
    Leap Years RealBen9 67
    Topological Sort albanian-laundromat 💎 210
    Abundant Numbers (Long) edsrzf 80
    Vampire Numbers kumavale 💎 148
    Pangram Grep Siri-chan 115
    Alphabetic Numbers CaedenHarper 3,915
    24 Game rucin93 💎 278
    Cubes scpchicken 346
    Prime Numbers madex 66
    Leap Years Steffan153 🥇 56
    Leyland Numbers kumavale 🥇 127
    Alphabetic Numbers madex 🥉 274
    Sphenic Numbers kumavale 91
    Collatz scpchicken 108
    Pernicious Numbers scpchicken 🥇 55
    Niven Numbers scpchicken 🥇 61
    Semiprime Numbers kumavale 89
    Alphabetic Numbers vang1ong7ang 🥈 243
    Time Distance madex 394
    Leap Years denkyuu1 76
    Fibonacci sisyphus-ppcg 🥇 64
    Smith Numbers HumanoidCPU 327
    ln 2 KasperKivimaeki 272
    Alphabetic Numbers kumavale 💎 169
    Leyland Numbers scpchicken 171
    Ulam Sequence HumanoidCPU 1,113
    Alphabetic Numbers KatieLG 3,100
    Tutorial oskgo 104
    Alphabetic Numbers dokutan 1,947
    Ulam Sequence kumavale 104
    Tongue-twisters edsrzf 355
    Ulam Sequence Shanethegamer 1,113
    Prime Numbers hymanimy 85
    Arithmetic Numbers hymanimy 234
    Fibonacci Lydxn 🥇 64
    CSS Colors JayXon 💎 672
    CSS Colors kumavale 🥈 673
    Calendar vang1ong7ang 🥈 320
    Maze vang1ong7ang 223
    Continued Fractions vang1ong7ang 🥈 187
    Hexdump vang1ong7ang 223
    Niven Numbers (Long) emgordon154 78
    Kaprekar Numbers kumavale 🥈 94
    SI Units edsrzf 💎 562
    Prime Numbers Heathcorp 72
    99 Bottles of Beer vang1ong7ang 273
    Reversi vang1ong7ang 🥈 206
    Morse Decoder vang1ong7ang 🥈 211
    λ vang1ong7ang 🥉 410
    Ten-pin Bowling vang1ong7ang 🥈 185
    Sudoku vang1ong7ang 🥈 490
    Rule 110 vang1ong7ang 113
    CSS Colors vang1ong7ang 709
    Day of Week vang1ong7ang 🥉 218
    Catalan Numbers vang1ong7ang 146
    Leap Years vang1ong7ang 60
    Card Number Validation vang1ong7ang 110
    Sudoku (Fill-in) vang1ong7ang 🥈 269
    Cubes vang1ong7ang 265
    Polyominoes vang1ong7ang 🥈 235
    Mahjong vang1ong7ang 🥇 283
    𝑒 vang1ong7ang 🥇 114
    Fibonacci Herbert00709 70
    Fibonacci roupiq 68
    Scrambled Sort kumavale 🥇 170
    Happy Numbers (Long) madex 157
    Evil Numbers (Long) madex 70
    Odious Numbers (Long) madex 70
    Niven Numbers (Long) madex 114
    Foo Fizz Buzz Bar madex 162
    99 Bottles of Beer madex 412
    Emirp Numbers (Long) scpchicken 171
    Nim madex 214
    Smooth Numbers madex 189
    Leap Years Lydxn 🥇 56
    Spelling Numbers kumavale 🥇 407
    Taxicab Numbers emgordon154 159
    ROT13 vang1ong7ang 118
    Morse Encoder vang1ong7ang 215
    Jacobi Symbol vang1ong7ang 🥉 194
    DFA Simulator vang1ong7ang 🥉 251
    Arithmetic Numbers vang1ong7ang 102
    Lucky Tickets madex 292
    Ascending Primes JayXon 🥇 95
    PalindromemordnilaP 0jdxt 164
    brainfuck 0jdxt 303
    Ascending Primes kumavale 🥇 95
    Emirp Numbers (Long) kumavale 🥇 120
    brainfuck Kivooeo 314
    Repeating Decimals JayXon 💎 261
    Repeating Decimals vang1ong7ang 🥈 267
    Billiards vang1ong7ang 🥉 232
    Poker vang1ong7ang 🥈 355
    Lucky Tickets vang1ong7ang 🥇 191
    Zeckendorf Representation JayXon 🥇 150
    Reverse Polish Notation JayXon 🥈 207
    Topological Sort vang1ong7ang 🥈 211
    United States vang1ong7ang 205
    Emojify vang1ong7ang 200
    PalindromemordnilaP vang1ong7ang 149