If a player who is low on time really has insufficient losing chances, the player ought to be able to make his or her moves very quickly. The time delay feature will allow that player to complete the game without facing an inevitable time forfeit. When using a clock that has the time delay feature, a player may no longer make claims under the insufficient losing chances rule. Instead, the game ends normally or after 175 moves, whichever comes first. For a good explanation of how to set individual models of digital clocks, see Michael Atkins' page on Using Digital Clocks .
Mechanical clocks are the next most preferred clock.
Digital clocks without the time delay feature are the least preferred type of equipment. When players have questions about what type of clock to use for a game, they should resolve the situation by referring to the three levels of clock preferences. Player A has a digital clock with time delay feature. Player B has a mechanical clock. Because Player A's clock is more preferred, he gets to use his clock for the game.