cnszsun

I will play the same. If lho wins spade ace, I can play diamond king on my right hand and ruff finesse it.

If there is no club return from lho forcing you to make early decision, I'm wondering which line has better odds: the double squeeze as suggested, or 3 rounds of heart, then club finesse.

1C-(1S)-DBL-(Pass) 2D Some say double only promises hearts and opener's 2d is similar to reverse. What's the commom understanding?

Who bid 1S? opponent?

为什么要纠结于叫什么名称，关键是这里讨论的两类叫牌序列其含义是有区别的。 1c-1s 2h,普通的逆叫进程，逼叫一轮，但不保证进局。 1c-1h 2s, 和跳叫新花一样，逼叫进局。 所以两者在牌力要求上还是有区别的。

At the 2nd trick, maybe we should play ♥Q rather than A to imply values in ♣? Is this treatment common among experts?

对，跳逆叫，和一般逆叫的区别是跳逆叫逼叫进局，和跳叫新花类似。

If trump doesn't break, will east lead from AQxx without knowing where 10 is? I guess unlikely.

I didn't realize the acution is so important for this problem. Anyway, it's like this: 1C 1D 1N 2C 2H 2S 3S 4S 1C:precision, 16+; 2C then 2S: an invite hand with 5+ spade suit.

Let's change your hand to Kxx J QJxxxx xxx, now, partner must shift to a heart at the 2nd trick. What I want to know is whether the Jack from you implies the suit preference for heart. Our discussions up to now seem a little bit off the topic.

Thanks, I agree with all your points. Just one thought, usually we don't play honour cards to show even count except doubleton, so Jack could be assigned special meaning. Sure, maybe I overthink here.

Yeah, you are right. The club shift will also beat it most likely. Because I'm interested in how experts interpret the signal under such circumstances, let's just suppose we don't hold club king to make a heart shift necessary.

Opps are in 4S, sry, I can't recall the auction. dummy: Axx AK10x xx AJxx yours: Kxx J QJxxxx Kxx Parter led diamond A, (from AK, we lead A). If we can get 2 diamonds, I'm pretty sure the heart shift will beat the contract, so I played diamond J, would you take it as a preference for heart assuming you are opening leader?

If declarer has 2 clubs, we always beat it. But, if he is 6421 or 5521, we need partner to shift to club, so I discard club ace as an alarm signal. I guess partner will understand this.

Will the choice be the same if you are favorable?

Both Vul, IMP, first seat - QJxxx QJxxx xxx Do you open 2h? If not, lho bid 1s, rho bid 2s, now?

哈哈，清将后出K用A盖，再送S，左边一定会送你入明手。 挥刀自宫总结的很形象。 如果你出小C，即使左手有J也没用，因为他可以出J J逼你上A，只有一个进张。

这牌攻防都不容易。看来只有首攻C才能有宕。

确实南不该叫5C，另外我以为即使南始终不叫牌，北也可以自己叫到6。

In some popular precision system, 2C opening promises 6+ clubs even with 4 majors. So, with 5clubs+4majors, it has to be opened 1D or 2D or1NT maybe. I wonder what's the reason behind it?

We would have been in a better position if we ruffed a club before playing 2nd trump. Now, I see no better option other than clearing trump and spade ace, spade 10.

I would play for the first type. Becuase even if we guess wrong and declarer happens to hold diamond suit, he still can't make with 3-5-5-0(he would be forced).

There was a hand on today's first session of semi-final, 6♣ played by joe. As declarer, you had to decide how to play trump suit for no loser with AKxxx vs J10xx, your lho preempted weak 2. My instinct was to play AK because you need to ruff 2 losers with dummy's trump, so even rho had Qxx, you may still down. I'm not sure if I have missed something.

防守是桥牌当中最难的环节，要求时刻都能集中精力。 以这幅牌为例，一开始如果没有找到♠换攻，我倒不觉得是很大的错误，我们完全可以构思其他的牌型结构，回♠不对而继续出♦是正确的。切不可以结果来判断防守正确与否。 当庄家出完♣，打♠将吃回手，再出将牌的时候，我们对庄家的牌应该一清二楚，他2-6-4-1牌型，要想打宕，需要拿2墩将牌，还要拿一墩♦将吃。同伴的将牌必须是K或Q，才能拿两墩将牌，K自然没问题，如果是Q，你必须用A拿住，回♣让同伴将吃进手，再打回♦。这个防守似乎比开始的换攻难，但其实更应该能找到，因为在此刻它是唯一正确的防守。 非常遗憾，南错过了这个精彩的牌局。

第二墩换攻s当然是致胜的一招，如前面两位分析的。不过南选择续攻D我也能理解。我贴出这幅牌的本意还不是指第2墩的防守。大家可以继续往后看下防守的致命错误在哪？