אתה נמצא כאן: ראשי / הטור של גבי לוי / "הערכת היד – ספירת לקיחות מפסידות – צעד נוסף קדימה" – כתבה ראשונה (אנגלית) מאת גבי לוי

"הערכת היד – ספירת לקיחות מפסידות – צעד נוסף קדימה" – כתבה ראשונה (אנגלית) מאת גבי לוי

פורסם בתאריך 09/12/2011.

אנו שמחים לפרסם את הכתבה הראשונה (מתוך 6)  בנושא " הערכת היד – ספירת לקיחות מפסידות – צעד נוסף קדימה"  -  "The Losing Trick Count A Step Further " (המקור: mrbridge).

עד כה ראינו איך ה-LTC עובד במצבים בסיסיים וללא יותר מדי חצאים! בפרק זה, הכותב מקווה להרחיב את הטווח במקצת ולתת לך עוד כמה כיוונים.

הכתבה היא בשפת המקור=אנגלית. בהמשך אעלה את התרגום בעברית וכתבות נוספות.

לקריאת הכתבה לחצו  כאן

הכתבה המלאה:

We have now seen how the LTC works in basic situations and without too many halves! In this chapter, I hope to extend the range a little and give you a few extra pointers.

I would like to start with a hand that should serve as a warning:

Oops! Following the LTC blindly, East counts 8 losers and so responds 3 , and West counts 6 losers and bids on to game. They might go down in 2, let alone 4. What has gone wrong?

Notice the difference between holding four aces and holding four kings! There are many little tips that can be used with the LTC and one is: 'Beware an aceless hand!' You should always add half a loser if your hand does not have an ace. In fact, in the extreme case that you hold neither a king nor an ace (as in the East hand) you should add a whole loser. The auction should of course be 1 - 2. Note, however, that even overbidding with the LTC can have its advantages: here the opponents may well be able to make a lot of tricks in a heart contract, and bidding up to 4 will certainly keep them quiet!

Nevertheless, here are some useful tips.

This list is not meant as a set of hard and fast rules, but simply as a guide-line to avoid too many discrepancies, the idea being that you should not rely exclusively on any one system of hand evaluation. These tips are therefore an attempt to bring in elements of other methods of evaluation, some of which I will discuss in the coming chapters.

The first three tips are relatively straightforward: the LTC evaluates kings and aces as the same, and usually in two hands they will balance each other out, but if the balance tips a long way to one side it is important to redress it. So, if your hand has three or four aces, the LTC is likely to undervalue its strength, hence you should take off half a loser. We saw the opposite of this in Layout 1, where the West hand held four kings, but no aces – the hand needed to be devalued by adding half a loser.

Generally, queens by themselves are weak but any honour in partner's suit is an asset (as I will discuss in the chapter on 'Good Hand, Bad Hand'), so if you hold a queen in your partner's suit, you should upgrade it to a full winner; this includes a doubleton queen which would count as only one loser.

Extra trumps can make a very big difference to a contract, allowing the full potential of distribution to be fulfilled: cross-ruffing and trump control become much easier. For these reasons, it is important to take trump length into account: take off half a loser for each extra trump in your fit.

Doubletons are not ideal for the LTC. 5-4-2-2 hands are generally a lot less powerful than 5-4-3-1 hands, but the LTC finds it hard to differentiate between them. It is important to downgrade the flatter types of hand and so I like to be wary when I hold two doubletons – perhaps not enough to add a half loser, but important to bear in mind.

Finally, there is the question of half losers – what on earth are you supposed to do then? You could bid 2 loudly or 3 softly I suppose but, as I am sure you know well enough, such ploys are not allowed. Instead, you have to evaluate your hand to be 'good' or 'bad'.

אודות Gabi

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