Chess By Post Premium is a chess game for iPhone that allows you to play correspondence chess with real people. You can challenge your friends to friendly games or play ranked matches against random opponents of similar skill levels. The game offers automatic push notifications to let you know when you have moves waiting.

One of the key features of Chess By Post Premium is its skill ranking system. It uses the classic Elo rating system to adjust your rank based on your performance in ranked games. You can improve your ranking by playing against comparable opponents and see how you compare to the top players on the leader board.

Chess By Post Premium is suitable for players of all skill levels. The game adapts your opponent's skill level based on your own skill level, ensuring a challenging and fair match. Additionally, you can play against a computer opponent that adjusts difficulty to match your skill level.

The game also offers other features such as practice chess puzzles to improve your game, end game analysis to review critical mistakes, head-to-head stats, move history statistics, in-game chat message board, and the ability to take notes on games to remember strategies.

With Chess By Post Premium, you can enjoy the timeless game of chess and connect with players from around the world on your iPhone.