Limit Texas Hold’Em is a variety of poker which is less popular than the standard unlimited Texas Hold’Em. But also easier to solve. Researchers have figured out a program which plays better on average than anyone else. If your definition doesn’t include winning as much money as possible.
Calling it solved means that they accomplished this by basically playing through every single possible game and always choosing the best play, regardless of opponent.
An amusing headline from Slashdot: Researchers “Solve” Texas Hold’Em, Create Perfect Robotic Player. A better rewrite: “Researchers solve a less popular subset of Texas Hold’Em, state that the real thing is much harder.”