This application solves the game of Four in a Row (classic Connect 4). The solver can evaluate and report the theoretical game ending result of all moves available to a player for any legal game board position. Users, or the solver, can then choose moves to play. This solver version can also interactively play the game with "perfect" artificial intelligence. Winning is not possible when the solver plays as 1st player, and extremely difficult when the solver plays as 2nd player. The game board permits adding, rolling back, and rolling forward moves for either player, at any time. The solver can run on any turn. These controls are helpful for finding game changing moves, checking alternate moves, or for cheating, with an in-progress or already completed game. Four in a Row Solver trial version is fully functional, but may require several hours to evaluate game boards with fewer than ten pieces. The full version utilizes a database of opening game positions for this task. v1.6: Adds game piece image rendering. v1.5: Adds game board image rendering. Solver play moves enhancements. Update AI transposition table logic. v1.4: Disable compute plies for non perfect play. v1.3: Player icons invoke player's solver. Rework display update sequence. Update setup page. v1.2: Solver can make and play moves. Solver can auto play on player's turn. Application retains game board on exit. Adds solver progress display. Adds game piece animation. Adds reset confirmation. Update setup page. v1.1: Highlight four or more in a row. Initial public release. v1.0: Initial hidden release.