Thank you Dokoko and Paul. The introduction to Transfer walsh as follows, Transfer Walsh is a bidding convention used in contract bridge.After a 1♣ opening bid, responses of 1♦ and 1♥ show heart and spade suits respectively. The "Walsh" terminology refers to the fact that these bids may conceal an equal or longer diamond suit. It allows opener to play a greater proportion of major-suit and no-trump contracts, particularly when using five-card majors. Transfer Walsh is used in responding to partner's 1♣ opening bid: 1♦: Shows at least four hearts 1♥: Shows at least four spades 1♠: Shows at least four, alternatively five diamonds 1NT: Shows 6-9 HCP and a balanced hand without a four-card major (a variation is to use 1♠ show either diamonds or 6-9 HCP balanced, with the 1NT response showing 10-11 HCP balanced.) Although responder's one level bids are not forcing a completed transfer from opener. In fact, over the 1♦ and 1♥ responses, opener will only accept the transfer holding minimum three-card support, otherwise bidding naturally. With four-card support, it is normal to accept the transfer at the 1-level holding a minimum hand and making a jump response with a maximum (or higher with very strong hands). With three-card support the transfer is always completed at the 1-level, with less than three-card support another natural response is given. After 1♣-1♠, however, the transfer is only completed with four-card diamond support. Advantages: Transfer Walsh in a very early stage of bidding determines the possibility of a fit, giving good control of further game and slam bidding. It becomes significantly easier to find 3-5 major suit fits. Opener (usually the stronger hand) becomes declarer in most major suit and NT contracts. (These are from WIKIPEDIA)
