Article View: rec.games.backgammon
Article #1845-2 problem
From: MIKA JOHNSSON
Date: Mon, 12 Oct 1992 19:46
Date: Mon, 12 Oct 1992 19:46
53 lines
2856 bytes
2856 bytes
HI ALL !
this is a problem from a game played on server
O to move 5-2 (actually O rolled 2-6, but 5-2 is a problem 2-6 is not)
X owns the cube at 9-7 (in 11 pointer)
the question is should O move to 18 or stay back at 20:
if O stays at 20: O gets 9 indirect shots (1/6) and 2 direct shots (11/36)
if O moves to 18: O gets 9 direct shots (11/36-13/36) and 4 inderect shots
(1/18)
so if O moves to 18 he gets more shots next time, but won't get any further
shots (ok in some rare cases yes X rolls 12, 12 or X prefers to hit for some
reason), but if he stays on 20 he will perhaps get many times shots on 12 or 13
(may even get shot on 19)
I would move 18/20 11/6 because in this case you get the shot next roll or not
(and if not O stll has some chances in race) O is well in the race in case X
rolls small and even if O doesn't hit (since X has rollled small and O big)
If O stays back he risks many pick and pass numbers also.
+-------------------------------------------------------------+
|\------------------------+-----+----------------------------/|
|| 13 14 15 16 17 18 | | 19 20 21 22 23 24 || ||
|| | | X O X X X X || ||
|| | | X X X X X || ||
|| | | X X X || ||
|| | | X || ||
|| | | || ||
|| | | || ||
|| | B 64| || ||
|| | A | ||--||
|| | R | || ||
|| | | || ||
|| | | || ||
|| | | || ||
|| | | O || ||
|| O | | O O O O O || ||
|| X O O | | O O O O O || ||
|| 12 11 10 09 08 07 | | 06 05 04 03 02 01 || ||
|/------------------------+-----+----------------------------\|
+-------------------------------------------------------------+
O to move 5-2:
-mika
Technical Details
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<1992Oct12.124313.1@sara.cc.utu.fi>Path:
arc1-ca.pugleaf.net!sparky!uunet!charon.amdahl.com!pacbell.com!ames!agate!doc.ic.ac.uk!uknet!mcsun!fuug!funic!polaris!sara.cc.utu.fi!johnssonShow Full Headers
Complete Article Headers
Path: arc1-ca.pugleaf.net!sparky!uunet!charon.amdahl.com!pacbell.com!ames!agate!doc.ic.ac.uk!uknet!mcsun!fuug!funic!polaris!sara.cc.utu.fi!johnsson From: johnsson@sara.cc.utu.fi (MIKA JOHNSSON) Newsgroups: rec.games.backgammon Subject: 5-2 problem Message-ID: <1992Oct12.124313.1@sara.cc.utu.fi> Date: 12 Oct 92 19:46:51 GMT Sender: news@polaris.utu.fi (Usenet News admin) Organization: University of Turku, Finland Lines: 53