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    The Chess Move Validation hole will go live in approximately . Why not try and solve it ahead of time?

    Recent Solutions

    Hole Golfer Bytes Time Submitted
    Chess Move Validation saito-ta 107
    Calendar o0lit3 💎 180
    Farey Sequence egu555 80
    Divisors egu555 40
    Flags bitsandbeyond 658
    Continued Fractions egu555 108
    Chess Move Validation zzh1996 117
    Seven Segment bitsandbeyond 109
    Collatz egu555 57
    Catalan’s Constant egu555 111
    Catalan Numbers egu555 49
    Intersection o0lit3 🥉 81
    Ascending Primes egu555 83
    Prime Numbers (Long) egu555 54
    Arithmetic Numbers egu555 65
    Connect Four BREMAUCY 1,140
    γ egu555 💎 86
    Niven Numbers (Long) egu555 35
    Niven Numbers egu555 35
    Thue–Morse Constant HumanoidCPU 1,007
    Evil Numbers egu555 37
    Odious Numbers egu555 35
    Evil Numbers (Long) egu555 45
    Odious Numbers (Long) egu555 41
    United States egu555 83
    Seven Segment o0lit3 🥉 83
    Card Number Validation vargaeszter 153
    United States JOrE20 94
    Ulam Sequence egu555 98
    Happy Numbers (Long) egu555 54
    Happy Numbers egu555 53
    Zeckendorf Representation egu555 91
    ROT13 BREMAUCY 35
    Tutorial quasar098 34
    Foo Fizz Buzz Bar JOrE20 68
    Factorial Factorisation egu555 103
    Hexagonal Spiral bitsandbeyond 172
    λ egu555 🥉 179
    ln 2 egu555 🥇 29
    τ egu555 29
    π egu555 27
    φ egu555 🥇 31
    𝑒 egu555 27
    Prime Numbers denkyuu1 31
    ASCII Table o0lit3 84
    Abundant Numbers (Long) o0lit3 🥇 41
    Abundant Numbers o0lit3 🥇 41
    √2 egu555 🥇 27
    12 Days of Christmas AsaiYusuke 406
    Cubes bitsandbeyond 162
    Roman to Arabic egu555 92
    Look and Say egu555 43
    ASCII Table egu555 99
    brainfuck egu555 106
    Van Eck Sequence sisyphus-ppcg 🥇 32
    Recamán o0lit3 43
    Van Eck Sequence o0lit3 🥇 32
    λ o0lit3 🥇 169
    Look and Say JOrE20 48
    Tutorial kiwiiq 33
    Alphabetic Numbers egu555 🥉 183
    Tower of Hanoi egu555 55
    Abundant Numbers (Long) egu555 59
    Tongue-twisters zzh1996 287
    Binary Lambda Calculus bitsandbeyond 226
    Chess Move Validation bitsandbeyond 127
    ROT13 bitsandbeyond 36
    Levenshtein Distance o0lit3 🥉 115
    Abundant Numbers egu555 59
    Maze o0lit3 77
    ROT13 o0lit3 🥇 32
    Arabic to Roman egu555 99
    Catalan Numbers o0lit3 🥇 42
    99 Bottles of Beer Xzyaihni 306
    Minesweeper zzh1996 77
    Forsyth–Edwards Notation zzh1996 70
    Chess Move Validation scpchicken 119
    Tutorial tastypear 33
    Yellowstone Permutation HumanoidCPU 4,015
    Pascal’s Triangle JOrE20 37
    Proximity Grid JOrE20 77
    Fizz Buzz Europe2048 44
    Proximity Grid scpchicken 78
    Rock-paper-scissors-Spock-lizard scpchicken 219
    Chess Move Validation JOrE20 126
    Van Eck Sequence Steffan153 37
    Quine Europe2048 28
    Roman to Arabic madex 101
    Ordinal Numbers JOrE20 48
    Tic-tac-toe JOrE20 52
    Proximity Grid Steffan153 🥈 75
    Continued Fractions denkyuu1 121
    Ordinal Numbers denkyuu1 46
    Musical Chords scpchicken 110
    Ulam Sequence madex 🥉 51
    Divisors JOrE20 38
    ROT13 JOrE20 35
    Ulam Sequence saito-ta 🥇 50
    Ulam Sequence Steffan153 🥇 50
    Ulam Sequence dokutan 982