Elyk25 Posted December 19, 2018 Report Share Posted December 19, 2018 Elyk25-GIB 23-23 https://webutil.bridgebase.com/v2/tview.php?t=ARDCHALLENGE:84dc1e16.03d7.11e9.a82b.0cc47a39aeb4-1545255979&u=Elyk25 Link to comment Share on other sites More sharing options...
shuba Posted December 19, 2018 Report Share Posted December 19, 2018 Shuba GIB -12Shuba Natalie +21 Links will be laiter Link to comment Share on other sites More sharing options...
cyrenman Posted December 20, 2018 Report Share Posted December 20, 2018 Group B cyrenman 28 - 12 Gerardo http://webutil.bridgebase.com/v2/tview.php?t=ARDCHALLENGE:0063d95c.034f.11e9.a82b.0cc47a39aeb4-1545197345 Link to comment Share on other sites More sharing options...
xenoquatz Posted December 20, 2018 Report Share Posted December 20, 2018 Group Chttp://webutil.bridgebase.com/v2/tview.php?t=ARDCHALLENGE:31505d18.0336.11e9.a82b.0cc47a39aeb4-1545186690&u=xenoquatz&v3b=app Xenoquatz 46-26 Povratnik Link to comment Share on other sites More sharing options...
cyrenman Posted December 20, 2018 Report Share Posted December 20, 2018 Group Bcyrenman 40 - 29 olegruhttp://webutil.bridgebase.com/v2/tview.php?t=ARDCHALLENGE:0e2ec8a2.034f.11e9.a82b.0cc47a39aeb4-1545197368 Link to comment Share on other sites More sharing options...
sfi Posted December 20, 2018 Report Share Posted December 20, 2018 sfi 21 - 18 heart76 https://webutil.bridgebase.com/v2/tview.php?t=ARDCHALLENGE:2015ae50.037d.11e9.a82b.0cc47a39aeb4-1545217155&u=sfi Link to comment Share on other sites More sharing options...
gordontd Posted December 20, 2018 Report Share Posted December 20, 2018 gordontd - xbabarx37 - 23https://webutil.bridgebase.com/v2/tview.php?t=ARDCHALLENGE:4fee7062.03b6.11e9.a82b.0cc47a39aeb4-1545241717&u=gordontd Link to comment Share on other sites More sharing options...
derppp Posted December 20, 2018 Report Share Posted December 20, 2018 derppp 42-25 mlbridge http://webutil.bridgebase.com/v2/tview.php?t=ARDCHALLENGE:5342ae10.03ef.11e9.a82b.0cc47a39aeb4-1545266204&u=derppp&v3b=app#row- Link to comment Share on other sites More sharing options...
Icycookie Posted December 20, 2018 Report Share Posted December 20, 2018 icycookie - barmar 33 - 11https://webutil.bridgebase.com/v2/tview.php?t=ARDCHALLENGE:1948afa3.02fd.11e9.a82b.0cc47a39aeb4-1545162168&u=Icycookie Link to comment Share on other sites More sharing options...
cyrenman Posted December 20, 2018 Report Share Posted December 20, 2018 Group Bcyrenman.15 - 17 ranmithttp://webutil.bridgebase.com/v2/tview.php?t=ARDCHALLENGE:7d137a3d.040a.11e9.a82b.0cc47a39aeb4-1545277870&u=cyrenman&v3b=appHas Link to comment Share on other sites More sharing options...
Natali_ Posted December 20, 2018 Report Share Posted December 20, 2018 Natali 28 - Ranmit 4 Link to comment Share on other sites More sharing options...
barmar Posted December 20, 2018 Report Share Posted December 20, 2018 barmar - diana_eva 43 - 27https://webutil.bridgebase.com/v2/tview.php?t=ARDCHALLENGE:0c0c0787.02fd.11e9.a82b.0cc47a39aeb4-1545162146&u=barmar Link to comment Share on other sites More sharing options...
barmar Posted December 20, 2018 Report Share Posted December 20, 2018 You have my full respect and appreciation for the work you do. However, FWIW if I were the TD I'd take the consequence of it and have a policy to amend the results of those few horrendous outliers - not to be misunderstood, this of course applies to any player in tournaments where the blunder counts.We've tried to fix some of the worst bugs -- it used to double 6NT with 2 cashing aces, then not lead them! (Presumably it envisioned a small chance to get a 2nd undertrick if it didn't set up declarer's kings, and not enough of the simulated hands had 12 tricks available in the side suits.) This particular problem is harder. It's not so obvious when the results of the simulations need to be ignored. And we can't look at the result at the other table to ensure that it plays the same way, to prevent And if you think the situation you raised is bad, how about all the times that it leads its singleton trump king, which it probably would have won when declarer takes a finesse? This is a consequence of the use of double dummy simulation -- it "knows" that declarer will play for the drop instead of finessing. I've considered whether we should put in another special case to block this, but there's a reason why it thinks a trump lead is best, and in many cases it doesn't actually give away a trick (if the ace is over the king you were going to pick it up anyway, and if partner has the queen there's no finesse.), and we have to be careful when overruling these decisions. Everyone who plays robot tourneys learns that things like this happen from time to time; the underlying design that uses DD simulation and statistical analysis has some obvious flaws. Sometimes you're the beneficiary, sometimes you're the victim. If things like this really bother you, you should stay away from GIB. Our work on improving GIB is primarily focused on fixing problems in the bidding database. We actively welcome reports on these issues. Link to comment Share on other sites More sharing options...
shuba Posted December 20, 2018 Report Share Posted December 20, 2018 SHUBA : - Natali +21https://webutil.bridgebase.com/v2/tview.php?t=ARDCHALLENGE:c2577d4a.03da.11e9.a82b.0cc47a39aeb4-1545257370&u=shuba - GIB -12 https://webutil.bridgebase.com/v2/tview.php?t=ARDCHALLENGE:c2577d4a.03da.11e9.a82b.0cc47a39aeb4-1545257370&u=shuba - Cyrenman +12 https://webutil.bridgebase.com/v2/tview.php?t=ARDCHALLENGE:10f6dbec.0400.11e9.a82b.0cc47a39aeb4-1545273394&u=shuba Link to comment Share on other sites More sharing options...
cyrenman Posted December 20, 2018 Report Share Posted December 20, 2018 Group B cyrenman 32 - 31 GiB http://webutil.bridgebase.com/v2/tview.php?t=ARDCHALLENGE:a9db74d8.0486.11e9.a82b.0cc47a39aeb4-1545331203 Link to comment Share on other sites More sharing options...
Povratnik Posted December 20, 2018 Report Share Posted December 20, 2018 Group C Povratnik 35 : 10 ye17 Boards Link to comment Share on other sites More sharing options...
Mkgnao Posted December 20, 2018 Report Share Posted December 20, 2018 pio_magic-Mkgnao 19-45 https://webutil.bridgebase.com/v2/tview.php?t=ARDCHALLENGE:736d74b2.0315.11e9.a82b.0cc47a39aeb4-1545172627&u=mkgnao Link to comment Share on other sites More sharing options...
gordontd Posted December 20, 2018 Report Share Posted December 20, 2018 Two of my games seem to have been missed off the spreadsheet - #34 & #39 above. Link to comment Share on other sites More sharing options...
smerriman Posted December 20, 2018 Author Report Share Posted December 20, 2018 Two of my games seem to have been missed off the spreadsheet - #34 & #39 above.Thanks - fixed a glitch in my script. Link to comment Share on other sites More sharing options...
twisterrz Posted December 21, 2018 Report Share Posted December 21, 2018 https://webutil.bridgebase.com/v2/tview.php?t=ARDCHALLENGE:ea52bf01.0426.11e9.a82b.0cc47a39aeb4-1545290079&u=twisterrz#row- twisterrz 38-41 mlbridge Link to comment Share on other sites More sharing options...
mlbridge Posted December 21, 2018 Report Share Posted December 21, 2018 We've tried to fix some of the worst bugs -- it used to double 6NT with 2 cashing aces, then not lead them! (Presumably it envisioned a small chance to get a 2nd undertrick if it didn't set up declarer's kings, and not enough of the simulated hands had 12 tricks available in the side suits.) This particular problem is harder. It's not so obvious when the results of the simulations need to be ignored. And we can't look at the result at the other table to ensure that it plays the same way, to prevent And if you think the situation you raised is bad, how about all the times that it leads its singleton trump king, which it probably would have won when declarer takes a finesse? This is a consequence of the use of double dummy simulation -- it "knows" that declarer will play for the drop instead of finessing. I've considered whether we should put in another special case to block this, but there's a reason why it thinks a trump lead is best, and in many cases it doesn't actually give away a trick (if the ace is over the king you were going to pick it up anyway, and if partner has the queen there's no finesse.), and we have to be careful when overruling these decisions. Everyone who plays robot tourneys learns that things like this happen from time to time; the underlying design that uses DD simulation and statistical analysis has some obvious flaws. Sometimes you're the beneficiary, sometimes you're the victim. If things like this really bother you, you should stay away from GIB. Our work on improving GIB is primarily focused on fixing problems in the bidding database. We actively welcome reports on these issues. One of the problem I see with the bidding (at least for me) is the use of law of total tricks when one opens a weak 2 in fourth seat. GIB will raise you even though it may have a very weak hand and opp did not bid. Link to comment Share on other sites More sharing options...
mlbridge Posted December 21, 2018 Report Share Posted December 21, 2018 Mlbridge / Hrothgar 17-34 https://webutil.bridgebase.com/v2/tview.php?t=ARDCHALLENGE:97be9fee.035d.11e9.a82b.0cc47a39aeb4-1545203612&u=mlbridge Link to comment Share on other sites More sharing options...
mlbridge Posted December 21, 2018 Report Share Posted December 21, 2018 Mlbridge / Xbabarx 37-28 https://webutil.bridgebase.com/v2/tview.php?t=ARDCHALLENGE:a8e4ee04.035d.11e9.a82b.0cc47a39aeb4-1545203641&u=mlbridge Link to comment Share on other sites More sharing options...
mlbridge Posted December 21, 2018 Report Share Posted December 21, 2018 Mlbridge / Elyk25 64-22 https://webutil.bridgebase.com/v2/tview.php?t=ARDCHALLENGE:e43a993d.0426.11e9.a82b.0cc47a39aeb4-1545290069&u=mlbridge Link to comment Share on other sites More sharing options...
hrothgar Posted December 21, 2018 Report Share Posted December 21, 2018 Mlbridge / Hrothgar 17-34 https://webutil.bridgebase.com/v2/tview.php?t=ARDCHALLENGE:97be9fee.035d.11e9.a82b.0cc47a39aeb4-1545203612&u=mlbridge Thanks for a fun match! Link to comment Share on other sites More sharing options...
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