Qubic is a generalization of tic-tac-toe in which players alternately place pieces to get four in a row (rows, columns, pillars, face
diagonals, or space diagonals) on a 
lattice. There are a total of 76 winning lines.
It was weakly solved by Patashnik (1980), who proved it to be a first player win,
and then strongly solved by Allis et al. (1994).
Qubic
See also
Connect-Four, Tic-Tac-ToeExplore with Wolfram|Alpha
References
Allis,
L. V. "Qubic." http://www.cs.vu.nl/~victor/qubic.htmlAllis,
L. V.; van der Meulen, M.; and van den Herik, H. J. "Proof-Number
Search." Artificial Intelligence 66, 91-124, 1994.Patashnik,
O. "Qubic: 
Tic-Tac-Toe." Math. Mag. 53, 202-216, 1980.Slagle,
J. R. Artificial
Intelligence: The Heuristic Programming Approach. New York: McGraw-Hill,
1971.Referenced on Wolfram|Alpha
QubicCite this as:
Weisstein, Eric W. "Qubic." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Qubic.html