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 2,114
brainfuck KasperKivimaeki 303
Tongue-twisters CaedenHarper 570
Gijswijt’s Sequence CaedenHarper 2,047
Emirp Numbers (Long) CaedenHarper 1,203
Sierpiński Triangle CaedenHarper 601
Diamonds CaedenHarper 1,150
Leyland Numbers CaedenHarper 933
Recamán CaedenHarper 944
Lucky Numbers CaedenHarper 4,867
12 Days of Christmas CaedenHarper 2,416
Emirp Numbers CaedenHarper 183
Kolakoski Sequence CaedenHarper 2,047
Vampire Numbers CaedenHarper 1,118
Cubes CaedenHarper 4,148
Rule 110 CaedenHarper 15,899
N Queens CaedenHarper 1,293
24 Game CaedenHarper 12,479
Polyominoes CaedenHarper 3,611
Tutorial DialFrost 129
Fibonacci desecaw13 82
Morse Decoder JayXon 💎 210
Lucky Numbers olleicua 5,869
Happy Numbers olleicua 188
Morse Decoder edsrzf 🥈 216
Fizz Buzz heanyang1 157
Abundant Numbers (Long) edsrzf 117
Rijndael S-box CaedenHarper 815
𝑒 CaedenHarper 1,050
√2 CaedenHarper 1,050
φ CaedenHarper 1,050
τ CaedenHarper 1,050
π CaedenHarper 1,050
λ CaedenHarper 1,050
γ CaedenHarper 1,050
ln 2 CaedenHarper 1,050
Kolakoski Constant CaedenHarper 1,050
Factorial Factorisation CaedenHarper 909
Catalan’s Constant CaedenHarper 1,050
Divisors ComputerKWasTaken 141
Collatz ComputerKWasTaken 120
Abundant Numbers edsrzf 117
Lucky Numbers JunkIce 4,872
Happy Numbers JunkIce 159
λ JunkIce 1,055
Billiards CaedenHarper 248
Ascending Primes emgordon154 226
Leyland Numbers emgordon154 194
Lucky Numbers emgordon154 205
Pascal’s Triangle emgordon154 166
Pernicious Numbers (Long) emgordon154 139
Seven Segment sean-niemann 🥈 157
Fractions emgordon154 148
Pernicious Numbers emgordon154 104
Quine emgordon154 117
φ emgordon154 165
√2 emgordon154 🥇 98
λ emgordon154 🥈 461
Catalan Numbers emgordon154 163
Smith Numbers emgordon154 191
Day of Week emgordon154 🥇 118
Number Spiral emgordon154 196
Card Number Validation emgordon154 151
ISBN emgordon154 181
Niven Numbers (Long) emgordon154 111
Niven Numbers emgordon154 88
Emirp Numbers (Long) emgordon154 179
Collatz emgordon154 115
Abundant Numbers emgordon154 115
Arithmetic Numbers emgordon154 125
Abundant Numbers (Long) emgordon154 116
Divisors emgordon154 110
Prime Numbers emgordon154 🥇 92
Prime Numbers (Long) emgordon154 98
Fizz Buzz emgordon154 140