If we were lucky enough to find three other humans on the network, the game could be fairly challenging. Modern programs can handle complex auctions, execute squeezes and read defensive signals, and they play and understand hundreds of conventions. Defensive signals, including count, attitude, suit preference and trump echoes. The higher skill levels may slow some programs down to a crawl. A similar feature lets you specify the computer's maximum thinking time for each bid and play.
Some programs also offer duplicate matches.
Online tutorials, expert tips, beginner lessons and interactive flow charts to explain the auction. In addition to explaining bids, some programs will even give you an analysis of how various contracts would do. This will improve the computer's defense when you're declaring, but it can also result in some downright silly plays. Some programs let you turn this feature off. There's been increasing interest in game-playing software since the 1997 chess match between world champion Gerry Kasparov and IBM's Big Blue program.