m*****u
发帖数: 5534 | 1 Rubber bridge, west dealer EW vul.
S W N E
P P P
1H P 3H P
4H P P P
North(dummy)
S:KJ6
H:AJ42
D:Q103
C:1052
East(you)
S:1043
H:85
D:94
C:QJ9873
Opening lead: DA
You start a high-low, and partner continues with K and 2 of diamonds; you
ruff; declarer follows 5 6 and J. You shift to CQ which loses to A, partner
playing 6. Dec plays a heart to dummy's A and a heart to his K (par
following) and two more heart winners, ending in the closed hand. |
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m*****u
发帖数: 5534 | 2 It isn't every day that you hold three likely defensive tricks against a vul
game contract when partner has made a takeout double. But then, bridge is a
strange game.
IMPs, south dealer, both vul.
North(dummy)
S:Q94
H:432
D:J
C:Q109543
West(you)
S:8762
H:KJ10
D:983
C:AJ8
S W N E
1H P P Dbl
RD 1NT 2H P
3H P 4H P
P Dbl AP
Opening lead: S8
Dummy covers with 9, partner with 10 and South wins K. Declarer plays the DA |
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b***y
发帖数: 2804 | 3 The question is, whether I should guarantee the contract with spades split 4
-3 (roughly 62%), or should I give myself an extra chance when spades split
5-2 (roughly 30%) while risking a club ruff. It really depends on how likely
I think C2 is a singleton.
If I play low at trick one, I am only wrong if C2 is a singleton, but I give
myself an extra 30% chance if trumps don't break too well. Since club lead
is marked from the bidding (almost regardless of LHO's club holding), I
think the chance of... 阅读全帖 |
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p***r
发帖数: 20570 | 4 There could be another stronger line if you take HK on the first trick. When
you cash CA and opp drops C9, you can suspect that it could be a singleton.
So you just play back H right away to cut opp's connections.
If opps cash 4 hearts, you just come back to the squeeze position.
If LHO wins HT and shoot back D, you just play DA, back to CK to check the C
position. When the bad news comes (assume LHO discards a D), you just play
another H and play LHO for 4-3-5-1. If RHO cashes all his hearts, y... 阅读全帖 |
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p***r
发帖数: 20570 | 5 The end position is
dummy: Q - AJTx
LHO: JT - KQ9
When declarer plays a low D toward dummy, if LHO plays low D, declarer has
to guess to play DJ to make it. |
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w****b
发帖数: 623 | 6 Now I've found the true distance between a real expert and me: I always
choose to sort my hand! -- to this topic, even when I sort my hand, I revoke
every once in a while.
To the original problem. If dummy has QJ9x, you would never cover. If dummy
has QJ8x or less, my opinion is you should cover. If you don't, and if oppo
has the 9, the half times oppo's guessed wrong is offset by the times you
hold KT tight, as now oppo know that they need to play the drop. Meanwhile,
if you don't cover and pd ... 阅读全帖 |
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p***r
发帖数: 20570 | 7 It appears that east shows 5 S + 4H, so it's usually a good idea to play a
simple squeeze against west in H and D. to reach that position, you need to
ruff 3 more spades.
So ruff S with CA.
C to C7,
ruff second S, with CK, suppose trump is 2-1 split.
J to CQ.
ruff the third S with CJ,
D to DK.
ruff the 4th S with C9.
ruff H to dummy.
Now play dummy's club and squeeze west in D and H. |
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p***r
发帖数: 20570 | 8 If east shows 5-4-3-1, it's still better to squeeze east. The only layouts
you want to take the finesse against east are 5-3-4-1 or 5-3-5-0. So if east
shows no clubs, it's better to finesse east, otherwise, it's probably a
good idea just to squeeze west. Also, the dummy reversal can help the
declarer to discover the club situation and decide which line to choose.
Also, this hand indicates a useful false card situation. Suppose you hold QT
KQxxx xxxx xx, you should play HK to encourage partner p... 阅读全帖 |
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p***r
发帖数: 20570 | 9 Well, not exactly a game theory problem. For game theory problems, you
usually mix your plays and your opps have no way to figure out which holding
you have. For problems like this, if you don't play HK, you are always
hopeless to induce declarer to play a dummy reversal if partner doesn't
return S. So it is a forced false card which shouldn't really work if your
opp knows you well. For most bridge players, this analysis to play the
forced false card is actually good enough to help them win a lo... 阅读全帖 |
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a****s
发帖数: 524 | 10 This is not a easy problem to solve at the table.
But again, IMHO, It's more of a inference problem than a percentage one.
If the declarer held C AQ2,and had played low in dummy on the first trick, presumably going to play King on his right.
Now if he also had D JTx, would he lead a small diamond from his hand?
Of course not. he'd have surely led the Queen from dummy to induce a cover
of King.
succeed
you
is |
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p*********6
发帖数: 679 | 11 You were playing ACBL Indy (MP scoring, sayc/std assumed but not enforced)
on BBO as South.
Dealer: North (Non Vul)
You : Sxxx DK3 CAKQJxxxx.
Dummy: SJTxx HQxxx DJ97 Cxx
Bidding:
P P 3NT* All Pass (*3nt alerted as gambling)
W led D4. It seemed you got a real chance to make it. What card should you
play from Dummy (to make E more like to continue D with DA)? or does it make
any difference at all what card you play at a true expert table? |
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v**********e
发帖数: 1295 | 12 The other question is how to reach dummy before small to K.
I think the natural way is the best way. Since we win HA in hand first, just
small to Q. If HA is in dummy, small to K.
That
how |
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i****e
发帖数: 642 | 13 Win the lead in hand (good play), then SK. Opps can't duck otherwise a H
ruff will be enough. The best opps can do is to return a trump. Then we
play SJ.
Now opps may have several play. (1) If a trump is played, we clear
trump, and enter dummy via club, so we end up 2S+1H+5D+1C. (2) If opps
play a heart, we need to duck a round so we have control on the suit. If
there is no spade or club ruff now, we are safe. (3) If opps play two
rounds of clubs to remove dummy entry before trumps are cleared... 阅读全帖 |
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i****e
发帖数: 642 | 14 No. If we play H, and west follows, we win in dummy (east discards for sure)
. Then we concede a D to east. Since we have an entry to dummy in C, east
can't destroy our entry. |
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i****e
发帖数: 642 | 15 Oh, then there is something interesting. If you did not keep C2 in dummy,
west could still exit to dummy with a small club :) |
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p***r
发帖数: 20570 | 16 One advantage of SJ is that you are not going to blow a double dummy trick
if you lead SJ. Also, SJ is unlikely to blow a single dummy trick (because
according to your bidding, declarer is likely to play you for S shortness).
So the worst case is that you miss a tempo. C leads can be very different,
it just has way too many ways to blow a trick and it requires some specific
holdings from opps to make C leads effective. That's why I said even
without simulation, I think it is quite a clear case... 阅读全帖 |
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b***y
发帖数: 2804 | 17 Tempo can be important though. Declarer has long spade suit which can offer
some discards, so it looks like an attacking lead may be needed. The chance
for club lead blowing a trick is not very high, since declarer cannot have
too many clubs at hand, it has to be specific holdings to cost you, such as
declarer having KJ doubleton and dummy having A. Even then, declarer still
may not be able to immediately get to dummy to pitch a diamond loser.
The problem of leading club is that you may lose a t... 阅读全帖 |
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b***y
发帖数: 2804 | 18 Because west has to discards before dummy? If west keeps only one D, then
dummy of course won't discard another D to bare DK. |
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b***y
发帖数: 2804 | 19 Because west has to discards before dummy? If west keeps only one D, then
dummy of course won't discard another D to bare DK. |
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b***y
发帖数: 2804 | 20 No need. If dummy has S9, then you just draw 3 rounds of trumps ending in
dummy, play CK and ruff another C, then play a trump to S9, that card will
squeeze East.
Of course you need to ruff C (and earlier H) with bigger trumps in order to
leave entry to S9, so you do need to plan ahead. |
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b***y
发帖数: 2804 | 21 In the 3-card end position, dummy has 1S, 1D, 1C, you have 3 diamonds Kxx.
Now dummy play a spade, what does East keep? |
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p*********6
发帖数: 679 | 22 You were right. Bucky's quiz can't be that straight. I think we might be
able to estimate roughly the odds about the 2 plays (S first or H first).
Let's only consider makeable cases (trump KJ in W or KJ split).
S first, you and dummy have 6 cards, you are ok with 3/4 split, so about 62%.
H first, you and dummy have 7 cards, you are ok if:
1) 3/3 split, about 36%;
2) w2/e4 split, about 24%;
3) w4/e2 split with K in E, about 0.5 * 24%;
total: 72% |
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b***y
发帖数: 2804 | 23 Exactly. Ditching HQ creates a sure entry to dummy, which can be useful. It
doesn't really cost anything since dummy had HJ, unless west led from Axx,
which would be virtually impossible, and East's attitude card confirmed this.
However, if you keep drawing trumps, West will have the opportunity to
discarding HK!! If East started with T9x in hearts that will create an entry
for east. :-)
For the same reason, winning HJ to ruff 3rd D is actually dangerous, if West
indeed only had 2 diamonds. West... 阅读全帖 |
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i****e
发帖数: 642 | 24 Sorry for tricking you :) I was hoping you ask what dummy discards, but you
didn't.
Actually, dummy discards S2, and partner follows H2.
The declarer is not a world star, but is a very reasonable player. So you
can expect H9 is not a novice play.
After you win HJ, you are not going to play H, I believe. S, D, or C? It
seems you like D better? |
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i****e
发帖数: 642 | 25 For now based on the dummy we see, D lead is better than my CK lead. It
keeps pard's possible C entry for D ruff.
Given dummy's DKQJ holding and your D lead, pard should know you are leading
singleton for sure. He should give you information for his entry on the
first D. You did not say what he followed on D, but told us what he followed
on trump, which is strange to me :) |
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b***y
发帖数: 2804 | 26 This is a simple hand, as you don't have many choices. :)
Ruff in dummy, spade to SA, trump to dummy, CQ... clear club then spade out. |
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D*******0
发帖数: 2523 | 27 上来就飞黑桃J, 防止了将牌4-1 或右手5-0的可能。
假设50%输给左手J, 显然继续回D, dummy可以将吃然后清光将牌。
唯一有危险的是草花2-0分布，但defense拿两张草花的看着dummy, 应该不会想到同伴
缺门吧？
我觉得综合起来，草花被将吃的可能很小，肯定小于将牌4-1/5-0的可能。 |
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n****i
发帖数: 109 | 28 partner has CQ, not singleton :)
dummy has AKQ1032 spade
Q:
dummy bid FSF or NMF then rebid his suit, does it mean 6-card suit? |
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b***y
发帖数: 2804 | 29 I think we can summarize the best line so far.
First, test diamonds. If 3-3 or DJ drop then claim. If DJ is outstanding in
LHO, claim (there are multiple ways to ensure 13 tricks).
If DJ is outstanding in RHO, next you play two more clubs (dummy pitch 1
heart, then D10).
1) If RHO has only 6 minor cards, you next cash 2 hearts, if LHO can follow
then RHO has at least 2 spades, you can pick up spade suit with confidence;
if LHO shows out then you know exact spade distribution too.
2) If RHO has a... 阅读全帖 |
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i****e
发帖数: 642 | 30 That is true killing defense. But unsure of trump support at dummy, a trump
lead is far from obvious.
At two tables, one table led CA, while the other one led a heart. These are
reasonable lead IMO. I like an ace lead better in this situation: risk to
cost a tempo is low, while you will have much better idea after you see
dummy.
Can you guess what were the result for these two tables? This hand seems
VERY interesting to me. |
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i****e
发帖数: 642 | 31 That is true killing defense. But unsure of trump support at dummy, a trump
lead is far from obvious.
At two tables, one table led CA, while the other one led a heart. These are
reasonable lead IMO. I like an ace lead better in this situation: risk to
cost a tempo is low, while you will have much better idea after you see
dummy.
Can you guess what were the result for these two tables? This hand seems
VERY interesting to me. |
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t*******y
发帖数: 10477 | 32 你太了解我了，我的牌的背面都是用骂死鱼手机PP订制的，所以我最爱当Dummy了。。。要不干嘛琢磨Dummy
Reversal呢？ |
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k*******g
发帖数: 57 | 33 发信人: Babylon (波斯王子), 信区: Football
标 题: 橄榄球for dummies (1)
发信站: The unknown SPACE (Mon Jan 18 02:49:37 1999) WWW-POST
橄榄球for dummies
一. Overview
美式橄榄球的场地长为100码, 宽度我不清楚 (反正不重要 :). 从球场中间开始标
号, 也就是说中线是50, 然后向两端递减, 每隔10码画一道线, 依次为40, 30, 20,
10. 在0码线, 也就是端线, 以外的区域叫 end zone (端区). End zone 的长度也是
10码. 这样橄榄球场地的总长度其实是 120 码. 在这间隔120码的场地两端各立了一个
鱼叉状的球门, 是为踢定位球 (field goal) 或 附加分 (extra point) 而设的.
橄榄球赛分四个quarters, 每个quarter各有15分钟. 头两个quarter后是
中场休息. 中间有无数次的停表时间在此就不一一细表.
在比赛的任何时刻, 每个队均只能有11名队员在场上, 一方全是进攻队员, |
|
c***p
发帖数: 8 | 34 发信人: Babylon (波斯王子), 信区: Football
标 题: 橄榄球for dummies (1)
发信站: The unknown SPACE (Mon Jan 18 02:49:37 1999) WWW-POST
橄榄球for dummies
一. Overview
美式橄榄球的场地长为100码, 宽度我不清楚 (反正不重要 :). 从球场中间开始标
号, 也就是说中线是50, 然后向两端递减, 每隔10码画一道线, 依次为40, 30, 20,
10. 在0码线, 也就是端线, 以外的区域叫 end zone (端区). End zone 的长度也是
10码. 这样橄榄球场地的总长度其实是 120 码. 在这间隔120码的场地两端各立了一个
鱼叉状的球门, 是为踢定位球 (field goal) 或 附加分 (extra point) 而设的.
橄榄球赛分四个quarters, 每个quarter各有15分钟. 头两个quarter后是
中场休息. 中间有无数次的停表时间在此就不一一细表.
在比赛的任何时刻, 每个队均只能有11名队员在场上, 一方全是进攻队员, |
|
c***p
发帖数: 8 | 35 发信人: Babylon (波斯王子), 信区: Football
标 题: 橄榄球for dummies (1)
发信站: The unknown SPACE (Mon Jan 18 02:49:37 1999) WWW-POST
橄榄球for dummies
一. Overview
美式橄榄球的场地长为100码, 宽度我不清楚 (反正不重要 :). 从球场中间开始标
号, 也就是说中线是50, 然后向两端递减, 每隔10码画一道线, 依次为40, 30, 20,
10. 在0码线, 也就是端线, 以外的区域叫 end zone (端区). End zone 的长度也是
10码. 这样橄榄球场地的总长度其实是 120 码. 在这间隔120码的场地两端各立了一个
鱼叉状的球门, 是为踢定位球 (field goal) 或 附加分 (extra point) 而设的.
橄榄球赛分四个quarters, 每个quarter各有15分钟. 头两个quarter后是
中场休息. 中间有无数次的停表时间在此就不一一细表.
在比赛的任何时刻, 每个队均只能有11名队员在场上, 一方全是进攻队员, |
|
c***p
发帖数: 8 | 36 发信人: Babylon (波斯王子), 信区: Football
标 题: 橄榄球for dummies (1)
发信站: The unknown SPACE (Mon Jan 18 02:49:37 1999) WWW-POST
橄榄球for dummies
一. Overview
美式橄榄球的场地长为100码, 宽度我不清楚 (反正不重要 :). 从球场中间开始标
号, 也就是说中线是50, 然后向两端递减, 每隔10码画一道线, 依次为40, 30, 20,
10. 在0码线, 也就是端线, 以外的区域叫 end zone (端区). End zone 的长度也是
10码. 这样橄榄球场地的总长度其实是 120 码. 在这间隔120码的场地两端各立了一个
鱼叉状的球门, 是为踢定位球 (field goal) 或 附加分 (extra point) 而设的.
橄榄球赛分四个quarters, 每个quarter各有15分钟. 头两个quarter后是
中场休息. 中间有无数次的停表时间在此就不一一细表.
在比赛的任何时刻, 每个队均只能有11名队员在场上, 一方全是进攻队员, |
|
c***p
发帖数: 8 | 37 发信人: Babylon (波斯王子), 信区: Football
标 题: 橄榄球for dummies (1)
发信站: The unknown SPACE (Mon Jan 18 02:49:37 1999) WWW-POST
橄榄球for dummies
一. Overview
美式橄榄球的场地长为100码, 宽度我不清楚 (反正不重要 :). 从球场中间开始标
号, 也就是说中线是50, 然后向两端递减, 每隔10码画一道线, 依次为40, 30, 20,
10. 在0码线, 也就是端线, 以外的区域叫 end zone (端区). End zone 的长度也是
10码. 这样橄榄球场地的总长度其实是 120 码. 在这间隔120码的场地两端各立了一个
鱼叉状的球门, 是为踢定位球 (field goal) 或 附加分 (extra point) 而设的.
橄榄球赛分四个quarters, 每个quarter各有15分钟. 头两个quarter后是
中场休息. 中间有无数次的停表时间在此就不一一细表.
在比赛的任何时刻, 每个队均只能有11名队员在场上, 一方全是进攻队员, |
|
c***p
发帖数: 8 | 38 发信人: Babylon (波斯王子), 信区: Football
标 题: 橄榄球for dummies (1)
发信站: The unknown SPACE (Mon Jan 18 02:49:37 1999) WWW-POST
橄榄球for dummies
一. Overview
美式橄榄球的场地长为100码, 宽度我不清楚 (反正不重要 :). 从球场中间开始标
号, 也就是说中线是50, 然后向两端递减, 每隔10码画一道线, 依次为40, 30, 20,
10. 在0码线, 也就是端线, 以外的区域叫 end zone (端区). End zone 的长度也是
10码. 这样橄榄球场地的总长度其实是 120 码. 在这间隔120码的场地两端各立了一个
鱼叉状的球门, 是为踢定位球 (field goal) 或 附加分 (extra point) 而设的.
橄榄球赛分四个quarters, 每个quarter各有15分钟. 头两个quarter后是
中场休息. 中间有无数次的停表时间在此就不一一细表.
在比赛的任何时刻, 每个队均只能有11名队员在场上, 一方全是进攻队员, |
|
c***p
发帖数: 8 | 39 发信人: Babylon (波斯王子), 信区: Football
标 题: 橄榄球for dummies (1)
发信站: The unknown SPACE (Mon Jan 18 02:49:37 1999) WWW-POST
橄榄球for dummies
一. Overview
美式橄榄球的场地长为100码, 宽度我不清楚 (反正不重要 :). 从球场中间开始标
号, 也就是说中线是50, 然后向两端递减, 每隔10码画一道线, 依次为40, 30, 20,
10. 在0码线, 也就是端线, 以外的区域叫 end zone (端区). End zone 的长度也是
10码. 这样橄榄球场地的总长度其实是 120 码. 在这间隔120码的场地两端各立了一个
鱼叉状的球门, 是为踢定位球 (field goal) 或 附加分 (extra point) 而设的.
橄榄球赛分四个quarters, 每个quarter各有15分钟. 头两个quarter后是
中场休息. 中间有无数次的停表时间在此就不一一细表.
在比赛的任何时刻, 每个队均只能有11名队员在场上, 一方全是进攻队员, |
|
|
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X***R
发帖数: 2410 | 42 .22 只有 dummy round, 没有 snap cap.
这些 dummy round 每发比真的 round 贵大约20倍。 |
|
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M*4
发帖数: 2937 | 44 刚搞了第一支mosin,有两个问题请教
1)还没去打过,用dummy round试了下,close chamber是很费力,可以看到bolt的几个部
件相互间被挤得有点位移才能完全上膛.但不装round时,很smooth.正常吗?还是我的
dummy round有问题,尺寸有误差?
2)barrel里面膛线还好,就是很多dust,不确定是不是锈.枪其他部分被前任枪主清洗润
滑得很好,就是这个barrel很脏.是不是说明是锈,而且很难清除的?如果是,有没有安全
隐患? |
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c******g
发帖数: 123 | 45 that wiz is too simple,sometime naive
fy3 is actually a competetion of dummy
more dummies,more exp |
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