Search results
Results from the WOW.Com Content Network
Hashiwokakero (橋をかけろ Hashi o kakero; lit. "build bridges!") is a type of logic puzzle published by Nikoli. [1] It has also been published in English under the name Bridges or Chopsticks (based on a mistranslation: the hashi of the title, 橋, means bridge; hashi written with another character, 箸, means chopsticks).
At first glance, it may seem that the odds are now even, 1:1, so that South should expect to do equally well with either of the two possible continuations. However, the principle of restricted choice tells us that while both lies of the cards are possible, the probabilities are 2:1 in favour of assuming West holds Q32 and to therefore play the ten.
In the partnership card game contract bridge, the Blackwood convention is a bidding convention developed by Easley Blackwood in 1933 [1] and still widely used in the modern game. Its purpose is to enable the partnership to explore its possession of aces, kings and in some variants, the queen of trumps to judge whether a slam would be a feasible ...
With LTC in effect, the required strength is about 4.5–7 losers, the latter only in favorable vulnerability. Similarly, a 4NT overcall shows an extreme two suiter (usually at least 6–5, often 6-6 or 7–6) and enough trick-taking potential so that a 5-level contract can be made, or a sacrifice will likely be profitable.
The difference in percentages is so close (the Bridge Encyclopedia states that the finesse is a 50% probability of success holding 8 cards, while the drop has a 53% holding 9 cards) that the slightest inference might influence a player to choose to finesse or to drop with nine cards.
Let ′ (,,,) be the probability of an East player with unknown cards holding cards in a given suit and a West player with unknown cards holding cards in the given suit. The total number of arrangements of (+) cards in the suit in (+) spaces is = (+)!
So, with 6.5 losers opposite 9.5 losers, we would calculate (19-16) = 3-level contract, or (25-16) = 9 tricks. With 4.5 losers opposite 7.5 losers: (19-12) = 7-level contract, or (25-12) = 13 tricks. This can help guide the bidding, as a standard opening hand typically has no more than 7.5 losers, and a typical hand with enough strength to ...
N W E S ♠ ♥ A ♥ Q J 10 ♦ — ♦ ♣ — ♣ — South to lead ♠ 4 ♥ 2 ♦ — ♣ A South needs all three remaining tricks in a notrump contract. South leads the squeeze card, the ♣ A, and West is squeezed in hearts and spades. If West discards the ♥ A, North's ♥ K becomes a winner. If West discards either spade, North's ♠ J becomes a winner. Note the following features of ...