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
Lucky Numbers CaedenHarper 106
Fibonacci CaedenHarper 62
Tongue-twisters CaedenHarper 641
Ascending Primes CaedenHarper 1,146
Gijswijt’s Sequence CaedenHarper 8,034
Emirp Numbers (Long) CaedenHarper 2,630
Sierpiński Triangle CaedenHarper 684
Diamonds CaedenHarper 1,671
Leyland Numbers CaedenHarper 1,562
Niven Numbers (Long) CaedenHarper 16,707
Pascal’s Triangle CaedenHarper 923
Evil Numbers (Long) CaedenHarper 4,990
Pernicious Numbers (Long) CaedenHarper 71,689
Recamán CaedenHarper 2,431
Collatz CaedenHarper 9,260
Van Eck Sequence CaedenHarper 8,589
Odious Numbers (Long) CaedenHarper 4,979
Leap Years CaedenHarper 1,640
Abundant Numbers (Long) CaedenHarper 2,474
Niven Numbers CaedenHarper 323
Foo Fizz Buzz Bar CaedenHarper 11,760
Inventory Sequence CaedenHarper 8,657
Prime Numbers CaedenHarper 255
Evil Numbers CaedenHarper 254
Odious Numbers CaedenHarper 263
Pernicious Numbers CaedenHarper 344
Smith Numbers CaedenHarper 4,114
Divisors CaedenHarper 146
Arithmetic Numbers CaedenHarper 124
Happy Numbers CaedenHarper 333
12 Days of Christmas CaedenHarper 3,081
Emirp Numbers CaedenHarper 386
Happy Numbers (Long) CaedenHarper 1,445
Prime Numbers (Long) CaedenHarper 13,363
Christmas Trees CaedenHarper 909
Kolakoski Sequence CaedenHarper 2,016
Vampire Numbers CaedenHarper 2,035
Look and Say CaedenHarper 1,433
ASCII Table CaedenHarper 415
Polyominoes CaedenHarper 11,208
24 Game CaedenHarper 20,659
Rule 110 CaedenHarper 16,500
Cubes CaedenHarper 4,801
99 Bottles of Beer CaedenHarper 13,720
Number Spiral CaedenHarper 394
Farey Sequence CaedenHarper 9,038
Kaprekar Numbers CaedenHarper 882
Abundant Numbers CaedenHarper 473
N Queens CaedenHarper 2,175
Rijndael S-box CaedenHarper 905
Tutorial DialFrost 107
Catalan Numbers CaedenHarper 4,175
Farey Sequence DialFrost 🥇 75
λ JunkIce 1,019
Farey Sequence primo-ppcg 🥇 75
ROT13 primo-ppcg 💎 123
𝑒 CaedenHarper 1,019
√2 CaedenHarper 1,019
φ CaedenHarper 1,019
τ CaedenHarper 1,019
π CaedenHarper 1,019
λ CaedenHarper 1,019
γ CaedenHarper 1,019
ln 2 CaedenHarper 1,019
Kolakoski Constant CaedenHarper 1,019
Factorial Factorisation CaedenHarper 878
Catalan’s Constant CaedenHarper 1,019
ROT13 SirBogman 🥈 142
99 Bottles of Beer primo-ppcg 💎 285
12 Days of Christmas primo-ppcg 🥉 524
Collatz stefangimmillaro 🥉 86
Catalan’s Constant madeforlosers 1,019
Pascal’s Triangle primo-ppcg 69
ISBN primo-ppcg 150
Happy Numbers primo-ppcg 85