Idaho Jump Bid, also known as Idaho Passing Bid, is a convention in contract bridge that involves a specific bidding sequence used by players to convey certain information to their partner. This bidding approach is commonly employed in competitive auctions when one player wishes to make a weak jump to the three level. The concept of an Idaho Jump Bid involves skipping an intermediate level of bidding and jumping straight to a new level, typically at or above the three-level. This bid is considered a preemptive action, aimed at disrupting the opponents' bidding and potentially stealing the contract. It is usually employed by the opener to create confusion and force the opponents to make higher-level bids. There are different variations of Idaho Jump Bids that players use depending on the partnership agreements and the specific bidding system employed. Here are a few types of Idaho Jump Bids: 1. Weak Jump Overalls: In this variation, the player who is not the opener makes a jump bid over the opponent's opening bid, typically at the three-level. This bid suggests a weak hand with a long suit in the suit bid and aims to interfere with the opponents' bidding. 2. Weak Jump Raises: In this type, the opener makes a jump bid in a new suit at the three-level after their partner's opening bid. This bid signifies a weak preemptive hand with support for partner's suit, intending to disrupt the opponents' auction. 3. Weak Jump Shifts: Here, the responder makes a jump bid in a new suit at the three-level, switching the suit from the opener's suit. This bid promises a weak hand with support for another suit and aims to confuse the opponents and hinder their bidding process. 4. Inverted Idaho Jump Bids: This variation is an advanced type of Idaho Jump Bid where the responder jumps to the four-level instead of the three-level, indicating an extremely weak hand and asking the opener to pass the bid if they have nothing significant in their hand. Idaho Jump Bids can be a valuable tool in a bridge player's arsenal, but they require a clear understanding and partnership agreement regarding their usage. These bids can be risky yet rewarding, as they aim to disrupt opponents' bidding and steal the contract.