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All comments by Adam Wildavsky
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Typo corrected - Tuesday, July 31 is the date. Thanks, Debbie!
June 29
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Glenn wrote to tell me that a memorial service for Margie will be held on Tuesday evening July 31 at the Summer NABC in Atlanta.
June 29
Adam Wildavsky edited this comment June 29
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To be clear, I meant the general format. We could use some of the same formats with shorter match lengths.
June 23
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I like that idea, David. We don't do it in the Open because we have drop-ins. That won't be a factor in the Mixed.
June 23
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Why not just use the scheme for the Open? It typically draws more entries, but it has (or used to have) plans for smaller entry sizes as well.
June 23
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Surely you are correct, Julian, though it might not make much difference in practice. Someone make the same point in the original thread.
June 20
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You mean in the “Butler Overview” pane, correct?

I see a Team filter but no Pair filter. Are they one and the same?

I found the Sort icon and pressed it. The pairs are sorted by relative Butler but it's tricky to tell because the display in one line tall. I can get a few more lines if I make the text smaller. I'm using Chrome on MacOS with a 13" screen. Should I try a different browser or a taller screen? How can I export the data, say to Excel or a SQL DB?
June 20
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It would! Also the ACBL and USBF, and NBOs around the world. For that matter, the online bridge DBs could be treasure troves too.
June 20
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Is there a way to view a list of the Relative Butlers for all pairs, ideally including full pair names and countries and sorted from highest to lowest? This would correspond to the Butler presentation on the EBL site but for Relative Butlers instead of raw Butlers.
June 20
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Richard Pavlicek has compiled some excellent statistics here:

http://rpbridge.net/rpme.htm

They're well worth a look.

He's not updated them in a few years, in part because he was disappointed that the ACBL and USBF moved to 15-board sets for their major KO events.
June 19
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Ante tells me he does IMP against the average, calculated after discarding the 4 highest and 4 lowest scores on the deal. That doesn't seem best to me. I had always assumed that “Butler” (named for England's Geoffrey Butler) and “Cross-IMPs” were synonyms, but it seems I was mistaken. Surely Cross-IMPs makes for a truer result, averaging after IMPing rather than before. That's how the Cavendish Pairs does things. IMPing against a datum ought to be a relic of the past, before computer scoring was introduced.

Does anyone know whether the EBL Butlers are calculated Cross-IMPs or IMPs against a datum?
June 19
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I've never seen a justification for removing the top and bottom scores. Do you know what it is? I can understand it in the old days when we IMPed against an average, but that's not a consideration here.

How does this method affect the score of a pair who achieve a top or bottom 25% score on a deal? Won't it tend to exaggerate their result there?

I'd love to see a comparison of the Butlers with and without the dropped scores.
June 19
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Thanks! I love your site, though I don't yet understand all of it.

I agree that calculating a relative Butler by adding a pair's Butler to the sum of its opponents' Butlers is a reasonable way to go. One can tweak it further, as other correspondents have suggested, but it is easy to calculate and further refinements are unlikely to make the relative rankings substantially truer. There will be some luck involved regardless.

I don't understand what “Butler was calculated with 25% cut” means.

I'm not convinced that ignoring the opposing Butler for pairs that have played fewer than 10 matches is an improvement. Surely 64 boards, or four matches, would have statistical significance. Even the Butler for a pair that has played two matches, one against us and one against another team, provides some data. If you are determined to discount Butlers for pairs with fewer boards than some threshold you could discount them partially rather than completely.
June 18
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I would love to see your site! When I try, though, I get a 404 error.
June 18
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Partner is a favorite to hold the JT, as otherwise declarer would likely have played a diamond from dummy after the 9 held. If you don't see the squeeze then a heart pitch will usually get the job done.
June 18
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That's a great resource, Ben. Thanks for sharing.
June 1
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As best I recall it was some combination of getting married, moving to Chicago, and his teaching career.

I first met Ivar around 1990 when he entered the NY Reisinger with Kaplan, Sheinwold, and his old regular partner Lenny Harmon. We started playing a few years later, in NABCs, Team Trials, and the Rosenblum Teams in Montreal.
May 31
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Works now both from iPhone and from MacOS browser. Thanks!
May 15
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Same result on my iPhone…
May 12
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When I'm on my Mac and I click the Apple App Store link above I get a message from iTunes saying “The item you've requested is not currently available in the U.S. store.” Perhaps I have to click from my phone…
May 12
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