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Unread post by irishwolf » Sat Feb 19, 2022 3:06 pm
Unread post by Wes (aka the legend) » Sun Feb 20, 2022 2:37 pm
Good order by S2. This is a "now or never" situation and S2 does not have to worry about blocking his P's loner down 9-8. So this "best I got" order with 2 trump + a green ace should be completely standard. I've also studied this hand configuration and based on my work this is +EV order. Ray's work also backs me up on this as he also got a +EV result although only slightly. The hand he tested was:
Unread post by irishwolf » Mon Feb 21, 2022 12:56 am
Unread post by Wes (aka the legend) » Mon Feb 21, 2022 2:55 am
For S2 it's not about scoring 2 pts, it's about surviving. Down 9-8, he's gotta make this "best I got" call, not just becuz if S4 passes they'll probably lose, but also becuz S2 doesn't have to worry about blocking his P's loner either at this score. On top of that we actually have hard data that backs up this call. In my own kitchen table sample of this hand type I reached the conclusion that this is a +EV call at a greater than 95% confidence interval. Ray's simulator also backs this up (although his EV is significantly lower than my EV it still backed up the claim that calling is better than passing from this hand configuration). IOW not only is this a call down 9-8, this is a call at ANY score except arguably those times we are down a significant amount and we're hunting for loners. For example, say we're in a typical weak euchre game and we are down 9-6 with this holding. In that case I am going to make the negative EV play and pass with this holding hoping to get lucky--hoping my P has that game winning loner. Is it correct to make a -EV play hoping to get lucky? IDK. That's a whole other debate, and a difficult proposition to prove, but that's what I would do.
Yes things can go wrong with leading trump, but this still comes down to what line is best overall for S2's range. Even taking into account that S2's range should in theory be wider than normal in this spot, I would be shocked if Ray's simulator showed that leading a quadrupleton off ace is better than leading trump in this spot.irishwolf wrote: ↑Mon Feb 21, 2022 12:56 amOrdering weak, leading the AD on 2nd trick only requires S3 to the JD/KD (JH buried or with S1) or JD/JH, or JH/KD (if JD buried) all sorts of combinations to get euchred. You have to score a point first and stay alive for the next deal to have a chance.
IRISH
Unread post by irishwolf » Mon Feb 21, 2022 11:09 am
Unread post by LeftyK » Mon Feb 21, 2022 12:02 pm
Unread post by irishwolf » Mon Feb 21, 2022 12:12 pm
Unread post by LeftyK » Mon Feb 21, 2022 12:21 pm
Unread post by Wes (aka the legend) » Mon Feb 21, 2022 1:06 pm
Unread post by raydog » Mon Feb 21, 2022 6:04 pm
Unread post by irishwolf » Mon Feb 21, 2022 6:25 pm
Unread post by Tbolt65 » Mon Feb 21, 2022 7:41 pm
Unread post by raydog » Mon Feb 21, 2022 7:56 pm
Unread post by irishwolf » Mon Feb 21, 2022 8:19 pm
Unread post by irishwolf » Tue Feb 22, 2022 10:22 am
Unread post by irishwolf » Tue Feb 22, 2022 12:03 pm
Unread post by raydog » Tue Feb 22, 2022 3:35 pm
Unread post by LeftyK » Tue Feb 22, 2022 5:29 pm
Unread post by Wes (aka the legend) » Tue Feb 22, 2022 5:52 pm
I would say we all are. The general recommendations on Seat 2 play are too tight. Good players are too concerned with blocking their P's loners. Your simulator can certainly help a lot of players improve in this area.raydog wrote: ↑Mon Feb 21, 2022 6:04 pmI had a look at this hand. First of all, my program doesn't bid this hand from S2 but should: EV = +0.39 if bid vs. EV = 0.21 if pass. It's the usual story of S1 getting a lot of good bids in, R2, if S2 and S4 both pass. I'm still working on optimizing bidding from S2.
Good stuff Ray. Even if we call this a statistical tie, I still would say I am shocked leading trump in this spot did not win out here. Looking back at this hand, I think you're on to something with your explanation. With an effective quadrupleton off Ace, after S4 leads his final trump there's a good chance he now has a strategically worthless hand whereas if he leads his dirty off ace at least it will do something like force out enemy trump for example and sometimes his team will get really lucky and his ace will walk.raydog wrote: ↑Mon Feb 21, 2022 6:04 pmThe next thing I did was fix S4's cards + the turn and randomize all the other cards. I then played 1,000,000 hands and isolated those where:
1) S2 bid with partner; and
2) S4 wins the first trick with trump and gets to lead 2nd trick.
This happened about 120,000 times.
This sets up the scenario as S4 sees it. Should they lead the AD or the AH?
AD lead: (66,403 / 155,455 / 11,116) [2 pts / 1 pt / euchred] EV = 1.142
AH lead: (45,964 / 183,741 / 3,269) EV = +1.155
So very close, with a slight edge to leading the AH (statistical significance?) Note the higher volatility if trump is led: more sweeps but also more euchres, in an appropriate ratio to balance out the EV effect.
This is much closer than I would have expected. I suspect the issue here is that, though S4 has a tripleton next Ace (little chance of winning) and would like to give it a better chance by first playing a round of trump, doing so leaves them with just those Hearts and no obvious entry into their hand. S1 is probably going to be re-leading whatever suit was trumped on the 1st trick (to create a bit of trumping havoc), and seats 2 and 3 are going to be playing their own Aces or promoting their Kings in the other suits. Unless someone else plays a Heart, that AH is just going to languish in S4's hand. But if S4 leads the AH, there's a small chance it could win, or a somewhat better chance that partner in S2 can win with trump or over-trump, and take control of the hand. And leave S4 in an excellent position to trump another trick.
Unread post by Tbolt65 » Tue Feb 22, 2022 10:09 pm
You might want to reread thoroughly instead of seeing a couple sentences.irishwolf wrote: ↑Tue Feb 22, 2022 10:22 amED,
Since you jumped in on the conversation. Your statement below on this, are you fully telling what you know about the what S2 held? Did you not not see the Hesitation. If not then you are as good as I think you are? Secondly, you conveniently not mention about Left not leading trump on Trick 5? And about the AS misclick? About the misclick, he had 3 days to say it was a misclick. It was not until Wes say, must be a misclick, lol. Left has previously not told the truth. Wes gives him an out and he jumps on it to save his bad play.
I know you are friends with Left - so don't candy coat this!
i KNOW B.S. WHEN I SEE IT!
IRISH
et's take everyones position who's in the hand and look at how it played out. Wolf's read was that his partner was thin and his only concern was playing for the point. He understands the score and the pause so he went into the hand with the mindset of his partner is very light. He specifically says he puts him on 9, 10 of trump. As for the rest of the possible holdings we don't know wolfs further assessment if any and this is what we have.
Unread post by Tbolt65 » Tue Feb 22, 2022 11:03 pm
Unread post by Tbolt65 » Tue Feb 22, 2022 11:19 pm
Tbolt65 wrote: ↑Mon Feb 21, 2022 7:41 pm
Lefty states that the ace of spade was a misclick. We have to give him the benefit of the doubt here. However if his thinking was short suit themselves. It's a bad idea since they dont have any trump high enough to take or force a bigger one if left hand opponent is void as well.
Tbolt65
Edward
Unread post by Wes (aka the legend) » Wed Feb 23, 2022 2:09 am
As someone who almost always chooses option 3, I'm very glad you tested this Ray. I gotta say I'm very shocked at the results. I certainly would've predicted that option 3 would comfortably beat option 2. I don't know what to think about this. Mind is blown. At least I know that my line of taking option 3 isn't costing me much as your results suggest this is close to a statistical tie. Btw there are hand configurations I would always trump in on the first lead. Hands like 2 trump+2 aces, 3 trump+2 aces, and 3 trump+suited ace. Basically when I deem that trumping in on 1st street and then leading trump on 2nd street is best for my hand then that's what I'll do.raydog wrote: ↑Mon Feb 21, 2022 6:04 pmAnyway, I looked at the play of the hand and noticed that S2 was always trumping the 1st trick with a low trump whenever possible, no matter the rank of the led card. I know this is considered poor play by many, so I tried to run a simulation to see if it was nonetheless the best play.
I played 1,000,000 completely random hands and isolated the cases where S2, as declarer, had the option to trump the 1st lead (about 49,000 hands). Here are the results:
1) always play off: (11,603 / 31,744 / 5,589) EV = +0.89
2) always trump low: (14,571 / 30,853 / 3,512) EV = +1.08
3) trump low if A led, else play off: (14,454 / 30,678 / 3,804) EV = +1.06
So always trumping yielded slightly better results (statistical significance?) than selectively trumping, and never trumping was easily the worst strategy. A few more sweeps and a few less euchres. I ran this twice with virtually identical results.
Even with this hand configuration I play off on 1st street on a non-ace lead but I've never felt that great about it. There's a bigger EV difference with this hand vs your data on overall 2S calls. I think I have a good idea why. With the 2 lowest trump we have no way of overtrumping the enemy later in the hand. So the value of laying off the first lead and holding back our 2 trump goes down. My prediction would be if S2 had AdXd in trump then playing off on a non-ace lead would be better. Either way your analysis has changed the way I will play these 2 low trump calls. From now on I'm always trumping in on the first lead. Incidentally someone like Edward who has vast experience in being partner will actually be able to read my hand in this spot. Since I usually play off in this spot unless I'm trumping in to send trump on 2nd street, whenever I do trump in on 1st street and then lead garbage on 2nd st Edward will know I started with 2 low trump. I like the idea that this strategy adjustment communicates a clear message to my P.raydog wrote: ↑Mon Feb 21, 2022 6:04 pmI then tested this hypothesis again using the hand dealt to S2 in this instance. I ran this for 100,000 hands, with about 18,500 of them offering S2 the option (Hearts was not a popular lead).
1) always play off: (1,934 / 9,611 / 7,053) EV = -0.04
2) always trump low: (2,060 / 11, 565 / 4,973) EV = +0.31
3) trump low if A led: (2,362 / 10,736 / 5,500) EV = +0.24
[remember, I didn't fix S4's cards - this is the scenario as seen from S2's perspective - so the AH can be led]
Once again, always trumping low seems to be the best strategy, but in this instance it reduces overall volatility: less sweeps but also less euchres.
That's awesome stuff Ray. The value of going for 2 down 9-8 and the fact that the math changes cuz the cost of getting euchred is now only 1 pt....we can generalize this idea to tons of hands. Basically any hand where the EV is close between two paths, down 9-8 always play for 2. For example, if I recall correctly for this S1-R1 call the EV of leading garbage was very slightly better than leading the Right:raydog wrote: ↑Mon Feb 21, 2022 6:04 pmThe final consideration with this hand is the score, and that proves to be quite important. S2/S4 would love to get 2 pts here, because that would give them the game right now and they don't have the next deal. On the other hand, the opponents are already at 9, so getting euchred is like getting -1, not -2 (which alters up the significance EV calculations).
Looking at the first set of outcomes (S4 leading the AD vs leading the AH on trick 2), the trump lead yields 20,450 more sweeps vs only 7,850 more euchres - almost a 3/1 ratio. Both of these outcomes will immediately end the game, so it looks quite favorable for S4 to lead the AD.
Indeed, plugging the results from that one decision into the probability-of-winning-the-game program, leading the AD yields a 50.4% chance of winning the game, while leading the AH yields a 45.7% chance. So my conclusion is that leading the AH is not actually a bad play given the EV stats, but given the score in this particular scenario it is better to lead the AD.
Unread post by irishwolf » Wed Feb 23, 2022 2:40 am
Unread post by irishwolf » Wed Feb 23, 2022 2:45 am
Unread post by Tbolt65 » Wed Feb 23, 2022 1:08 pm
Unread post by irishwolf » Wed Feb 23, 2022 3:32 pm
Unread post by irishwolf » Wed Feb 23, 2022 3:44 pm
Unread post by Tbolt65 » Wed Feb 23, 2022 3:48 pm
Unread post by irishwolf » Wed Feb 23, 2022 6:18 pm
Unread post by irishwolf » Wed Feb 23, 2022 6:49 pm
Unread post by Wes (aka the legend) » Wed Feb 23, 2022 6:57 pm
Yep, the AH was the best lead overall for S2's entire range. Something I clearly did not see coming. The only question is, is the EV difference between leading the AD vs the AH statistically significant?
Unread post by Tbolt65 » Wed Feb 23, 2022 7:45 pm
Unread post by irishwolf » Wed Feb 23, 2022 9:52 pm
Unread post by irishwolf » Fri Feb 25, 2022 12:25 am
Unread post by Tbolt65 » Fri Feb 25, 2022 2:42 pm
irishwolf wrote: ↑Fri Feb 25, 2022 12:25 amThis is in two Parts:
Part A is for Ray, your Simulations. Part B is for anyone!
A) The issue with Item 2, (see below in red), I still have heard from Ray as to this scenario? Item 2 should be broken down into 2 categories. A) Always trump IF YOU ONLY HAVE A DOUBLETON KING OR BELOW vs B) DON'T IF YOU CAN CREATE A VOID. Good players play it this way. This then can realistically be compared with 1) & 2). If not you can elevate that EV, IMO. In addition, playing off all depends. Such as JH/JD, or JD/KD, should not trump except an ACE. JH/JD - never trump even with an ace If you hold 9D/10D you always should trump unless you can create a void. 9D/10D/QD - you should always trump regardless of those other two cards. Does Ray's simulator do this? I SERIOUSLY DOUBT IT!
Thus I will always take those simulations as pointing in the right direction, NOT THE HOLY GRAIL! Just me, sorry Ray, not intended to offend you!
B) Next issue, I contend playing the AH (hand as Posted originally) will out perform even stronger hands that S2 might hold. Euchre rates will be low and S2 can over trump S1. Or he can even trump the AH if he thinks he can win all the rest of the tricks. He knows where the AD. As far as simulations, they have to be played optimally. For example, when AH is led, two unknown hearts, 26% of the time those will be split between S1 & S3. When this occurs or anytime the AH wins a trick, NOW S4 leads his AD (not the KH). Is the simulator programmed to do this? S2 can over trump S1 51% of the time or create a void. What does the simulator do if S2 wins the 2nd or 3rd trump?
Since S2 knows where the AD is, S2 should even use the JH to over trump should S1 trump the AH lead. However, he should not use the JD at the 2nd trick, slough unless he has an ace. Again, how does the simulator play in those situations?
Thus I contend the AH is a better lead to trick 2. So who can refute it, give the STATS that will?
IRISH
Unread post by LeftyK » Fri Feb 25, 2022 7:12 pm
Unread post by irishwolf » Fri Feb 25, 2022 11:16 pm
Unread post by Tbolt65 » Sat Feb 26, 2022 12:30 am
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