the author of this app says:
PocketGrandmaster boasts a fully configurable chess board, simple yet far-reaching functions to work with game databases, various levels, a chessclock, an analysis mode for tutoring and problem solving, and even hints to help improve your gameplay!
PocketGrandmaster allows to play real people over the internet on the two popular chess servers ICS and FICS and lets you select between a variety of preconfigured levels for both tournament and blitz games.
PocketGrandmaster features three extremely strong chess engines with an openingbook of 200,000 moves, and plays interesting and often aggressive chess. The engine is a successor to the program finishing 4th in the World Microcomputer Chess Championships 2001, winning the title of the 18th World Microcomputer Amateur Chess Champion.