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
Untitled (How Does It Feel) guitar. On the song's final chorus section, critic Steve McPherson wrote "after it hits a peak, it keeps rising, the chorus of voices fizzing into overdrive and the whole track gradually succumbing to a wash of reverb". The song is cut off in the middle of its culmination, ending with the line "How does it fee-". Co-written by D'Angelo and producer Raphael Saadiq, "Untitled (How Does It Feel)" features sexually-explicit lyrics that follow and narrate a man's plea to his love interest for sex, as demonstrated in the song's second verse: "Love to make you wet / In between your