Connect Four on 6 high, 7 wide grid, there are 4,531,985,219,092 positions for all game boards populated with 0 to 42 pieces. The game was first solved by James Dow Allen (October 1, 1988), and independently by Victor Allis (October 16, 1988). Allis describes a knowledge-based approach, with nine strategies, as a solution for Connect Four. Allen also describes winning strategies in his analysis of the game. At the time of the initial solutions for Connect Four, brute-force analysis was not deemed feasible given the game's complexity and the computer technology available at the time. Connect Four has since been solved with
TI Connect in Windows 3.1. One feature which TI Connect did not retain from TI-Graph Link was the ability to edit TI-BASIC on a computer, but unlike TI-Graph Link, does not require a software version specific to each calculator. Many slowdowns are experienced with the software, usually resulting from the slow USB connection between the computer and calculator. Unexplained errors sometimes occur with the software, preventing users from transferring programs over. One solution is to use the TI SendTo sub-application, which is more stable than the Device Explorer. TI Connect TI Connect is an application available from Texas Instruments (TI) that allows