[1] It is related to tic-tac-toe, but more related to three men's morris, Nine Holes, Achi, Tant Fant, and Shisima, because pieces can be moved to create the three-in-a-row.
To create a three-in-a-row of one's pieces either horizontally, vertically, or diagonally.
Two diagonal lines connect the two opposite corners of the board.
These four additional diagonal lines is what makes the Picaria board different from Tapatan or Achi.
The second version uses a similar board except there are four additional spaces or intersection points to play pieces at.