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“It” Happens!

Posted By: Taper_Mike
Date: Friday, 9 August 2013, at 6:15 a.m.

WTF Kind of Unlimited Game Is This?

According the analysis by GnuBg, I only made three errors in this practice game. Judging by the stacks you would have thought I played much worse.

The Snowie ER of –4.94 would have been a lot lower if I had not sacrificed 0.18 on the double whopper I made in this position. The only other errors were a 0.025 checker error and a 0.030 recube error late in the game.

Getting back to the whopper at right, what’s your play?

GnuBg60

4X2X4X2X2X ' ' ' ' ' ' '

7O1O1X ' '5O '2O ' ' ' '
Taper_Mike55
Position ID: b28DAAh/4TMAAA Match ID: cAkFACAAAAAA

 

Problem 11 from Advanced Backgammon

This was an unusual game that featured 54S-42P-32, an opening that appears as Problem 11 in Bill Robertie’s Advanced Backgammon. I screwed that up back in 2012, but got it right today. I posted a separate rollout and analysis last year.

GnuBg161

1O ' '2X1O4X '2X ' ' '4O

2X ' ' ' '5O '4O ' ' '5X
Taper_Mike158
Position ID: mGfwATDg8+ABIQ Match ID: cAkNACAAAAAA

 

So What’s with the Stacks?

I am still amazed that I got all stacked up without making beaucoup errors.

The set of diagrams at right and below show the sequence. The first five positions immediately preceded the position at the top of this post. The last one immediately followed it.

You can see that I rolled a series of 5s and 7s. Not hitting, while piling on the ace point, was correct on every roll. After playing the final 61, I ended up with a remarkable position that featured 8 checkers on the 1pt, 6 checkers on the 6pt, and nothing in between.

My only explanation is the one in the subject: “It” Happens!

Mike

GnuBg112

 '2X3X2X2X2X1X ' ' ' '2O

2O1O1X '2X4O '4O ' '2O '
Taper_Mike108
Position ID: dtsCgAkLz2MGAA Match ID: cIkWACAAAAAA

 

GnuBg106

 '2X3X2X2X2X1X ' ' ' ' '

2O1O1X '1X6O '6O ' '1X '
Taper_Mike88
Position ID: dtsCAgkLPz8AAA Match ID: cAkVACAAAAAA

GnuBg99

 '2X3X2X2X2X1X ' ' ' ' '

3O1O1X ' '6O '5O ' '1X1X
Taper_Mike81
Position ID: dtsCBQgXfj4AAA Match ID: cAkOACAAAAAA

GnuBg90

 '2X3X2X2X2X1X1X '1X ' '

4O1O1X ' '6O '4O ' ' ' '
Taper_Mike74
Position ID: dttKAAgv/DwAAA Match ID: cIkRACAAAAAA

 

GnuBg74

 '3X4X3X2X2X ' ' ' ' ' '

5O1O1X ' '6O '3O ' ' ' '
Taper_Mike67
Position ID: 7t0GAAhf+DkAAA Match ID: cAkVACAAAAAA

GnuBg68

2X2X4X3X2X1X ' ' ' ' ' '

6O1O1X ' '6O '2O ' ' ' '
Taper_Mike60
Position ID: 27sFAAi/8DMAAA Match ID: cIkJACAAAAAA

GnuBg54

4X2X4X2X2X ' ' ' ' ' ' '

7O1O ' ' '6O ' '1X ' ' '
Taper_Mike70
Position ID: b28DIAB/4QcAQA Match ID: UQkHACAAAAAA

 

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