Chess Is Agony, DelightBy ROQER CHOATEATLANTA, Ga. (AP) - Chess is a contrary mistress who dispenses sweet delights and ago-play chess/’“It is the torture of your soul to play chess, declared Nicho-las RussolLmo, the international grand master competing in the-68th annual U.S. Open Chess Championships under way in Atlanta.I didn’t sleep much last night, Rossolimo said Monday. I thought about my mistakes all night.The 57-year-old Russian-born champion is competing in a tournament which lias attracted competitors ranging from Pal Benko and Robert Byrne, international grand masters and defending eoehampions, to 15-! year-old Eugene Meyer.Hunched over throw-away paper chess boards, more than 200 pluyers display determination or worry, fury or plain placidity. “They're impossible, said tournament director I George Koltanowski, a syndicated chess columnist. “They're probably the nicest people under (he sun except when they play chess.1Many Americans dislike chess, Kollanowski said, because they hate to lose. And losing usually takes place before the satisfaction of winning assumes permanence.But Rossolimo, who learned chess at the age of seven during the Russian Revolution, said he plays not necessarily to win,; “but for doing something brilliant and original.brijantSERVICECLEO'S 5500 N. MARIETTA