This month's question comes a student of George Rasmussen. The
score is tied 47-47*. You're pone, and get dealt
A-4-J-J-Q-Q. What do you keep? |
hide answers
Dan Barlow:
I toss the Qs. Dealer is unlikely to get a double
run, as I have two J. Keeping J-J-Q-Q
loses on all but three cuts. Tossing J-Q is actually
more likely to give up a double run. With a good cut, you
might steal dealer's crib here. If I needed 18 and dealer needed 10,
I'd keep J-J-Q-Q, and if I needed 20 and dealer
needed 30, I'd give him A-Q. But this early in the
game I am content to keep what will give me the most points on the
most cuts.
John Chambers:
With the score tied at 47-47, both players would be in good
position as the dealer. Since you are the nondealer, the dealer is
about three holes ahead of his average. In other words, on average
he would be at hole 44*. This being the case, as the nondealer, you
have to hope his hand and crib are below average, and minimize his
pegging. You could keep A-4-J-J but you're discarding
a pair of Qs to your opponent. In this situation this
could be dangerous. After all a tenth card is cut about
of
the time. You could keep J-J-Q-Q and discard
A-4 but the same principle applies as in the previous
example. I would keep the 4-J-J-Q in this position.
You are already in position. And It's not how many points you get
this time. It's how many points your opponent will get in his hand,
crib and pegging.. So break up the crib, and if your opponent gets a
below average hand and doesn't peg much you would be in good
position.
DeLynn Colvert:
I keep J-J-Q-Q. Since you hold four face cards, the
A-4 danger is diminished somewhat, and if you hit a
16 hand, the game is in your corner.
George Rasmussen:
Do I play six points here and chance Q-Q to
opponent crib? Or do I play A-4-J-Q for four points
and toss J-Q to crib? None of those sound good to me
at this point on board. Dealer is already four points beyond minimal
position on second street. If dealer has average hand, crib, pegs on
this deal and average on next hand as non-dealer, will have very
good position. Challenge to opponent is to keep crib small and avoid
pegs. In this situation at hole 47, there is nothing to be gained by
non-dealer playing six points and tossing Q-Q or
playing four points with J-Q discard. The major way
the position advantage of the dealer could be altered is to keep
crib size down. The only defensive discard in this entire hand is
the A-Q. Do it and play two points and take only safe
pegs. You can give the dealer an average hand in this position. You
just cannot afford to give anything else. Your position is fine to
deal if you can keep your opponent at holes 55–57.
Add a crib and pegs to that and you're in trouble. Strict adherence
to board position principals will dictate maximum defense for pone
in this area.
Michael Schell:
This is a damn hard problem to evaluate over the board. Let's
start by reviewing some theory. We're both near the positional hole,
so the four-to-one rule comes into play. I talk about this
rule, and the concept of the yellow zone
here. (And yes, the four-to-one
rule applies around every positional hole, not just the Fourth
Street one, although its impact is proportionately greater the
closer you are to home.) To summarize, if an aggressive keep gets me
four times as many points on average than it costs me in the crib, it's
worth doing, even in an ostensibly defensive position.
There seem to be four choices: the aggressive A-4-J-J, the
defensive 4-J-J-Q, the middling A-4-J-Q,
and the all-or-nothing J-J-Q-Q. I'll dispense with the
middling approach first: J-Q in opponent's crib gives up 5.5 points
on average. Q-Q gives up just .3 more at 5.8. Although the retained
Js appear to make the Q-Q toss less dangerous than usual, Hessel's
computer modeling shows that run blockers only have value if the
discarded card is between 2 and 8 (see
here). Nevertheless,
J-Q
is only nominally safer than Q-Q, and certainly isn't
worth a two point sacrifice.
I'll let HALSCRIB give the scoop on the interesting
J-J-Q-Q alternative. That leaves me with 4-J-J-Q.
It gives up 4.3
points on average, and here the retained 4 does count for
something (as a 15 blocker), subtracting about .05 points from the
relative risk in this particular case. Let's say that tossing A-Q is 1¼ points
safer than tossing Q-Q. A-4-J-J keeps
four points more than 4-J-J-Q (and in reality
averages 3½ points more). That clearly
doesn't reach the four-to-one threshold, so I'll just toss the safe
A-Q, planning to
lead the 4, and
hoping to prevail on the back end if my opponent's cards start to
falter.
Phyllis Schmidt:
I would keep A-4-J-Q. It's a variety of cards, and I'm
not giving any points to the crib, just potential!
Peter Setian:
I would keep 4-J-J-Q. Even with a lucky cut for 16
points (holding J-J-Q-Q), I would still be a little
short of a good dealing position on Third Street. So I would choose
the most conservative discard to try and hold the dealer back as
much as possible.
HALSCRIB:
Schell already explained why we can eliminate A-4-J-Q
from serious consideration. Otherwise we have one of those
troublesome questions of how aggressively to discard. I'm going to
run A-4-J-J, 4-J-J-Q and
J-J-Q-Q through my simulator and see where the distribution
of scores at deal's end comes out. I can then evaluate them based on
my knowledge of my winning chances at those different scores.
No matter what I do I'm an underdog here. The most likely result
is for the game to end five deals after this one, when my opponent
has first count. The problem with playing conservatively here by
tossing A-Q is that it commits me to a defensive game
plan and opens up the risk that even if my opponent falters, I might
not reach the game hole after he takes his first count. I'm at 47
now — so far so good —
but if I only keep two points, and I have to peg defensively
for a few deals, the prospect of falling short is a real one.
Alternatively I can keep six points with A-4-J-J.
It's not as good defensively in the crib, but it's a little safer in
the pegging (leading the 4 from 4-J-J-Q
is awkward on a 7 reply), and those extra points
could be very valuable down the stretch. My estimate is that this
weighs in favor of A-4-J-J to the tune of 1–2% better
winning chances.
J-J-Q-Q is an interesting try. It gets me to 63
points on eight cuts, a 17% shot. That's still several points short
of position, though, even after allowing for average pegging, so
I'll estimate that my chance of winning on the front end this way by
"jumping" my opponent is about 5%. Unfortunately tossing him
A-4 while also keeping a lousy defensive pegging hand (with
little diversity and no low card lead) rates to lower my back end
(defensive) winning chances by 6–7%. This isn't a good tradeoff
unless I'm desperate for a skunk. It's A-4-J-J for
me.
As hard as this problem is to evaluate accurately, you humans can
at least take comfort in knowing that unless you pick the clearly
inferior A-4-J-Q, you won't be making too bad a
mistake whatever you do.
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Panelists
Dan Barlow won the 1980 National Open Cribbage
Tournament, and made the 1985 All American Cribbage Team. His cribbage
strategy articles appeared in Cribbage World for many years, and
can be seen on the
ACC Web site.
He also provides strategy tips at
MSN
Gaming Zone. He has written seven books on cribbage, two of which have been glowingly reviewed in Games Magazine. All, including his latest book Winning Cribbage Tips, are available at
The Cribbage Bookstore.
John Chambers was one of the original founding
members of the ACC. He is a Grand Master, winner of seven major
tournaments, and author of
Cribbage: A New Concept, He also directs three annual
tournaments: the Ocean State Cribbage Classic, New England Peer
Championship and Charity Cribbage Challenge.
DeLynn Colvert (1931–2019) is the highest rated tournament player in the history of organized cribbage. He was a five-time National Champion, author of
Play Winning Cribbage, longtime editor of the monthly magazine Cribbage World,
and the ACC's only Life Master - Seven Stars. He also directed two annual tournaments in Missoula, MT, served as the ACC's President, and was one of the game's most affable emissaries. It's scarcely an exaggeration to say that Colvert's career defines modern cribbage. George "Ras" Rasmussen is a Life Master - Two Stars, a four-time All-American, the national Grass Roots Division 1 champion in 2009, a former state champion in Virginia, Montana and Washington, and holds a Gold Award and a President's Award. He also directs the Washington
State Championship, held each year in Centralia, WA. His articles on
cribbage are available on the
ACC Web site.
Michael Schell is a pioneer of modern cribbage theory, which synthesizes traditional concepts of expert play with new computer-informed insights and analysis. He has published Cribbage Forum since 2000. Schell holds a Bronze Award, is a Washington State Champion (2001), and was one of the principal architects of ACC Internet Cribbage.
Phyllis Schmidt is a charter member of the ACC, and has been
playing cribbage for about 40 years. She is a Life Master - One Star, a
Senior Judge, a National Champion (1992) and winner of the ACC Tournament of Champions (2005). She attends about 30
tournaments a year.
Peter Setian has played cribbage for over 20 years, and has
been a member of the ACC for about 14 years. During that time, he has
won seven major tournaments and earned his Life Master rating. He plays
in about eight tournaments per year, including the ACC Tournament of
Champions and the annual Grand National. He enjoys participation in
Grass Roots Club #72.
HALSCRIB is widely regarded as the world's strongest computer
cribbage player. Its opinion was solicited using a special analysis
version of the program. Since HALSCRIB only speaks binary, its thoughts
have been translated into English by Michael Schell and its creator, Hal Mueller, a retired mathematics professor and eight-time ACC tournament winner. For more information, see the
HALSCRIB home page.
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