The Tic-tac-toe hole will go live in approximately . Why not try and solve it ahead of time?

Recent Solutions

Hole Golfer Bytes Submitted
Trinomial Triangle HumanoidCPU 2,073
Divisors CaedenHarper 55
Prime Numbers CaedenHarper 54
ROT13 retrohun 🥈 118
Tutorial Natanaelel 37
Farey Sequence primo-ppcg 💎 55
Fibonacci desecaw13 61
Catalan Numbers CaedenHarper 2,878
Card Number Validation frankgraziano 🥇 54
λ JunkIce 1,007
Tongue-twisters CaedenHarper 529
Ascending Primes CaedenHarper 518
Gijswijt’s Sequence CaedenHarper 2,006
Emirp Numbers (Long) CaedenHarper 1,162
Sierpiński Triangle CaedenHarper 560
Diamonds CaedenHarper 1,109
Leyland Numbers CaedenHarper 892
Niven Numbers (Long) CaedenHarper 7,444
Pascal’s Triangle CaedenHarper 775
Evil Numbers (Long) CaedenHarper 1,956
Pernicious Numbers (Long) CaedenHarper 20,668
Recamán CaedenHarper 903
Collatz CaedenHarper 3,232
Van Eck Sequence CaedenHarper 2,561
Odious Numbers (Long) CaedenHarper 1,951
Abundant Numbers (Long) CaedenHarper 970
Foo Fizz Buzz Bar CaedenHarper 5,725
Inventory Sequence CaedenHarper 2,629
Evil Numbers CaedenHarper 76
Odious Numbers CaedenHarper 79
Lucky Numbers CaedenHarper 4,826
Pernicious Numbers CaedenHarper 106
Smith Numbers CaedenHarper 1,830
Arithmetic Numbers CaedenHarper 37,648
Happy Numbers CaedenHarper 113
12 Days of Christmas CaedenHarper 2,375
Emirp Numbers CaedenHarper 142
Happy Numbers (Long) CaedenHarper 558
Prime Numbers (Long) CaedenHarper 5,954
Christmas Trees CaedenHarper 551
Kolakoski Sequence CaedenHarper 2,006
Vampire Numbers CaedenHarper 1,077
Look and Say CaedenHarper 1,285
Abundant Numbers CaedenHarper 169
Kaprekar Numbers CaedenHarper 446
Farey Sequence CaedenHarper 4,360
ASCII Table CaedenHarper 281
Number Spiral CaedenHarper 306
99 Bottles of Beer CaedenHarper 11,891
Cubes CaedenHarper 4,107
Rule 110 CaedenHarper 15,858
N Queens CaedenHarper 1,252
24 Game CaedenHarper 12,438
Polyominoes CaedenHarper 3,570
Rule 110 primo-ppcg 💎 80
Niven Numbers (Long) DialFrost 46
Happy Numbers DialFrost 🥉 62
Happy Numbers (Long) DialFrost 🥉 63
𝑒 CaedenHarper 1,007
√2 CaedenHarper 1,007
φ CaedenHarper 1,007
τ CaedenHarper 1,007
π CaedenHarper 1,007
λ CaedenHarper 1,007
γ CaedenHarper 1,007
Rijndael S-box CaedenHarper 774
ln 2 CaedenHarper 1,007
Kolakoski Constant CaedenHarper 1,007
Factorial Factorisation CaedenHarper 866
Catalan’s Constant CaedenHarper 1,007
Pernicious Numbers (Long) DialFrost 77
99 Bottles of Beer DialFrost 194
Morse Encoder frankgraziano 551
Roman to Arabic frankgraziano 106
ISBN frankgraziano 59