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Problem of the week 2. Problem of the week 2.

08-26-2010 , 06:02 AM
Our second weekly problem is an advanced problem from the tail end of a game of nine ball. The table is a regulation American pool table, very well maintained with well cut and open pockets, a clean and even running cloth, and even bouncing rails.

The score is 4-3 to your opponent in a race to five in the opening round of a low buy in, alternating break tournament. The opponent in question is a very skilled semi-professional player – easily able to make long runs of balls and who has broke and cleared down to the seven, failed to break up a locked seven and nine, and played safe. You are too close to the nine to be able to jump shot or masse/swerve the cue ball into the seven direct.

Also, assume that barring a major fluke if you fail to pot the seven ball you will lose this frame (and match) pretty much 100% of the time, but that on the flip side, if you do pot it you are skilled enough that you will win the frame 100% of the time (and hopefully the match with the break next frame).

Best shot here and why?



Problem of the week 2: Solution.

***Will be doing the solutions within the same thread to limit the number of threads - although if the general concensus is for it to revert back to having it's own thread will switch back.***

Spoiler:

Our second weekly problem sees us in very deep trouble at the tail end of a game of nine ball. We are one frame away from losing the match, completely snookered behind the nine, and facing an opponent who is close to a professional standard.

When considering situations like this, the first and most important thing to consider is your opponent's skill level. This problem has a very different answer against a bad amateur, and in this case you are in extremely desperate territory against a very skilled player. There are very few shots that will reliably leave the seven safe, and even if you do against a player this good, you will pretty much always be in trouble again the next shot considering their available options.

The only two safety shots that leave you any hope of even getting back to the table in this situation are a very hard deliberate foul, or an also very hard two/three cushion nudge up to the seven. Not only are both of these shots very hard, neither carries a very high percentage success rate in terms of leaving your opponent in trouble, and you would be lucky just to get back to the table facing a hard snooker – with both the nine and/or eight in very good positions to set snookers behind for a skilled player.

This desperate situation leaves us only one option – all out attack. Against this player type, our key concern here has to be the shot with the best chance of potting the seven. There are only two realistic possibilities here:

a) the two cushion swing around like this (sorry the lines are so bad but you get the idea):



or,

b) the one cushion with lower right hand side like this:



Of these two choices, b) is vastly superior. Although judging side/English off cushions is always tricky, this is mitigated somewhat by the fact that the alternative shot both requires two cushion hits which always makes your shot harder; as well as the two cushion escape making the potting angle of the seven much smaller.

With shot b), we only have to hit one rail, but much more importantly, we leave a very large margin of error to pot the seven. Coming at it from such an angle leaves us by far the highest percentage chance of potting the seven – as any straighter shot has a much larger margin of error than a thin cut. If we hit it even roughly in line (or even if we hit the cushion first in many angles) we should pot the seven – something not the case from the two cushion escape where we have to be extremely accurate to have any hope of cutting it in.

Often pool is about weighing up risk/reward carefully, and just like in poker, taking a harder move on is frequently correct as long as the possible reward far outranks the extra risk. This is a classic example of this in action, and an area where skilled players will really shine as the opponent's rarely spots/takes on these shots, and therefore go on to lose a much higher percentage of these frames than someone able to think through these shots carefully.


Solution: You should take on the one cushion shot with lower right hand side/English, which despite being slightly harder than the two cushion escape, sinks the seven and keeps you alive a much higher percentage of the time.

Last edited by gregorio; 09-18-2010 at 02:42 PM.
08-26-2010 , 06:59 AM
Obviously, the worst thing you can do here is give your opponent ball-in hand, so you need to give yourself a good chance to make the hit while giving yourself the best chance for a winning outcome. I like kicking two rails here, first hitting the long cushion to the left of the side pocket at the top of the diagram, then the short rail. There are lots of potential positive outcomes here: you can clip the 7 and leave the CB on the opposite long rail, you could bank the 7 cross-side, you could hit the 7 thin and leave the CB behind the 8, or make a thin hit on the right side of the 7, leaving the 7 on the short rail and the CB uptable. Looking to kick precisely, I'd go with the last option and hit the CB with enough speed to make sure it gets to the opposite end of the table after clipping the 7. If your kicking game isn't that precise, swing away and let the balls lie as they may.

I did think about two other options here. going two rails, hitting the right-hand short rail first with the intent to pocket the 7 is a viable option. However, I thought it was a little dangerous, because the lower left corner pocket looms large of you end up hitting the 7 thin. If you don't make the 7, there's no possible good result - you're either leaving the ball close to the pocket, or your opponent will be left close to the 7 with a good opportunity to jam you up again. The other option I thought about was to roll the 9 into the 7, but that requires deadly accurate speed and directional control to be effective, and there's the likelihood that if you do execute the shot well, you'll come back to the table in another bad position.
08-26-2010 , 09:01 AM
hmm, i like either the deliberate foul, tie them up so that as we're looking, the 9 is frozen with the 7 about half a ball off the cushion, meaning he can't just kick it out and leave us behind it, or play off one cushion with right coming up and down, gives us a decent shot of hitting it, if not making it
08-26-2010 , 10:50 AM
Quote:
Originally Posted by sixfour
hmm, i like ... the deliberate foul, tie them up so that as we're looking, the 9 is frozen with the 7 about half a ball off the cushion, meaning he can't just kick it out and leave us behind it
me too
08-26-2010 , 11:04 AM
deliberate foul and lock the 7/9 ??
08-26-2010 , 03:01 PM
Fwiw i dont play much 9 ball i'd be coming off the rail near the black with left hand side off the bottom cushion and try to hit/lay on the ball
08-29-2010 , 06:35 AM
with the objectball close to the rail and the pocket and u got natural posiiton if u make it the 2 rail is an easier shot than a table length deliberate foul where your likely to lose even if u execute it perfectly
08-30-2010 , 01:21 AM
Quote:
Originally Posted by Ponder
with the objectball close to the rail and the pocket and u got natural posiiton if u make it the 2 rail is an easier shot than a table length deliberate foul where your likely to lose even if u execute it perfectly
+1, but i really rarely ever play 9ball. i'd actually go two rails, short rail on the 9 side to the long rail to pot. i would also miss because i suck
08-30-2010 , 01:30 PM
Off the top cushion with right-hand side to avoid the 9 and attempt to pot the 7, either direct or cushion first. This is assuming the assertion in the OP that "if you fail to pot the seven ball you will lose this frame (and match) pretty much 100% of the time", so assumedly the 3 cushion roll up is out of the question. I don't like the deliberate foul to tie up the 7 and 9 because 1) it's a very delicate, precise shot and 2) you're going to be in just as much trouble next turn anyway.
09-02-2010 , 09:17 AM
I just want to say that I love this forum and these weekly problems. A+ Wamy.
09-18-2010 , 02:43 PM
Here is the shot in action
http://www.youtube.com/watch?v=xsHAG8YrXG8#t=22m45s
09-18-2010 , 02:49 PM
Quote:
Originally Posted by gregorio
i was just about to show that


its a good shot, leaves more margin for error!
09-18-2010 , 03:29 PM
I stole the link from you, obviously

      
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