פורסם בתאריך 12/07/2011.
אנו שמחים לפרסם את הכתבה השלישית (מתוך 5) בנושא "הערכת היד – כיצד לפתוח עם ידיים מאוזנות" (המקור: mrbridge).
הכתבה השלישית עוסקת בהיבט נוסף: הערכת "ידיים של 15-17 נקודות".
הכתבות הן בשפת המקור=אנגלית. בהמשך אעלה את התרגום בעברית וכתבות נוספות.
לקריאת הכתבה לחצו כאן.
Now let's concentrate on the 'new' aspects of the no-trump table.
A 1NT rebid shows 15-17 points
This is a similar width of range to your 1NT opening (12-14) and it works just the same. A responding hand with a good 8 points would invite game by bidding 2NT.
A jump rebid of 2NT shows 18 or 19 points, which leaves room to explore if necessary.
:Here are some examples
In Layout 2, West rebids just 1NT to show his 17 points and he is very glad to have stayed that low when he sees his dummy! He will need some luck to make seven tricks, but at least he is in with a good chance – more than could be said for a 2NT contract!
In Layout 3, the same West hand rebids 1NT and this time East, with a 'good' 8 points, tries for game by bidding 2NT. West can accept the invitation happily because he has a maximum hand for his bidding: he has shown 15-17 and he has 17. 3NT is a good contract.
:Now let's look at a deal where the extra bidding space comes in very handy
In old-fashioned Acol the bidding would have been 1 – 1 – 3NT – End. Consider how that auction differs from the unhurried sequence above. West shows his 19 HCP by rebidding 2NT; then East, with just 6 HCP, but a point for his five-card suit, is happy to go for game – but which game? They might have an eight-card fit in either spades or hearts, so East set about exchanging information. 3 shows precisely three cards in hearts, as he would have supported right away with four. 3 was another excellent bid, once again showing three-card (delayed) support. Now East is able to select the best game – 4 – using all the information available from his side's accurate bidding. Note that 3NT will go one or two off, while 4 makes in comfort.
In this last example and in some to come, you will notice an important rule: any continuation over a 2NT rebid is forcing to game. It offers partner a choice of games, in this example enabling the partnership to choose between 4, 4, or 3NT.
Here East had a relatively balanced hand, but responder could be very distributional. Over a 2NT rebid you have room to manoeuvre, but over a 3NT rebid you are stuck. In Layout 5, the West hand is the same as in Layout 4, but East is very shapely:
Although East has just 5 HCP, he is right to respond with two good five-card suits. Over a 3NT rebid he would be left in a very difficult position and passing would probably be the wisest option, but over 2NT his life is much easier: he can rebid his second suit to give partner the choice of the two suits. Once again West shows delayed support for spades and now East can go for game. Playing in a suit contract, East's hand is worth a lot more than 5 points. Eleven tricks are likely in spades, while 3NT will fail because of the club weakness.