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
Pernicious Numbers (Long) HumanoidCPU 20,668
Arithmetic Numbers HumanoidCPU 37,648
Prime Numbers (Long) HumanoidCPU 5,954
Niven Numbers (Long) HumanoidCPU 7,444
Lucky Numbers HumanoidCPU 4,826
Catalan Numbers HumanoidCPU 2,878
Farey Sequence HumanoidCPU 4,360
Foo Fizz Buzz Bar HumanoidCPU 5,725
Odious Numbers (Long) HumanoidCPU 1,951
Evil Numbers (Long) HumanoidCPU 1,956
Van Eck Sequence HumanoidCPU 2,561
Inventory Sequence HumanoidCPU 2,629
99 Bottles of Beer HumanoidCPU 11,891
Collatz HumanoidCPU 3,232
Kolakoski Sequence HumanoidCPU 2,006
𝑒 HumanoidCPU 1,009
φ HumanoidCPU 1,009
√2 HumanoidCPU 1,009
Gijswijt’s Sequence HumanoidCPU 2,006
ln 2 HumanoidCPU 1,009
τ HumanoidCPU 1,009
Divisors HumanoidCPU 1,172
π HumanoidCPU 1,009
Leap Years HumanoidCPU 736
Smith Numbers HumanoidCPU 1,830
Emirp Numbers (Long) HumanoidCPU 1,162
Recamán HumanoidCPU 903
Abundant Numbers (Long) HumanoidCPU 970
Look and Say HumanoidCPU 1,285
24 Game HumanoidCPU 12,438
Leyland Numbers HumanoidCPU 892
Catalan’s Constant HumanoidCPU 1,009
Pascal’s Triangle HumanoidCPU 775
Diamonds HumanoidCPU 1,109
Polyominoes HumanoidCPU 3,570
Kolakoski Constant HumanoidCPU 1,009
γ HumanoidCPU 1,009
N Queens HumanoidCPU 1,252
Factorial Factorisation HumanoidCPU 868
Happy Numbers (Long) HumanoidCPU 558
Vampire Numbers HumanoidCPU 1,077
Ascending Primes HumanoidCPU 518
Christmas Trees HumanoidCPU 551
λ HumanoidCPU 1,009
12 Days of Christmas HumanoidCPU 2,375
Rijndael S-box HumanoidCPU 774
Kaprekar Numbers HumanoidCPU 446
Fibonacci HumanoidCPU 140
Number Spiral HumanoidCPU 306
Abundant Numbers HumanoidCPU 169
Fizz Buzz HumanoidCPU 256
Emirp Numbers HumanoidCPU 142
Pernicious Numbers HumanoidCPU 106
ASCII Table HumanoidCPU 280
Niven Numbers HumanoidCPU 97
Happy Numbers HumanoidCPU 113
Odious Numbers HumanoidCPU 79
Evil Numbers HumanoidCPU 76
Tongue-twisters HumanoidCPU 529
Prime Numbers HumanoidCPU 77
Partition Numbers HumanoidCPU 653
Factorial Factorisation edsrzf 121
Fibonacci CaedenHarper 141
Ascending Primes CaedenHarper 519
Gijswijt’s Sequence CaedenHarper 2,007
Emirp Numbers (Long) CaedenHarper 1,163
Sierpiński Triangle CaedenHarper 561
Diamonds CaedenHarper 1,110
Leyland Numbers CaedenHarper 893
Niven Numbers (Long) CaedenHarper 7,445
Pascal’s Triangle CaedenHarper 776
Evil Numbers (Long) CaedenHarper 1,957
Pernicious Numbers (Long) CaedenHarper 20,669
Recamán CaedenHarper 904
Collatz CaedenHarper 3,233