The 46th Maryland Open is coming up on Memorial Day weekend, May 25-26. The longest running tournament in the nation, many go players use it to prep for the annual U.S. Go Congress, coming up in July. The event – held at the Catonsville Senior Center — includes five rounds, three on Saturday, two on Sunday. “Come for one day or both!” say organizers. So far, 16 players, ranging from 23 kyu to 6 dan have already registered.