[ View Thread ] [ Post Response ] [ Return to Index ] [ Read Prev Msg ] [ Read Next Msg ]

BGonline.org Forums

Summary of the “Isight Method”

Posted By: Taper_Mike
Date: Thursday, 11 December 2014, at 9:42 p.m.

In Response To: Summary of the “Isight Method” (Christian Munk-Christensen)

How do the opponent's checkers on his 4-, 5-, and 6-points influence the number of rolls I need to bear off? Pls explain why the opponent's checkers are relevant for how my pipcount needs to be adjusted. Thanks! :-)

Axel Reichert, the inventor of the Isight Method, explains why in his publication Insights with Isight.

The short answer is simply that the trial-and-error process used by his parameter optimization generated that result. In addition to the penalties he eventually decided upon, Axel tried assigning penalties for gaps independent of the opponent’s position. The best such forumalas gave incorrect cube actions for the 50,000+ positions he tested more often than the relative penalty he adopted.

If he had done it the other way, there would be offsetting penalties when both players had the same gap. The difference between their adjusted counts would be the same, but the base used for the leader would be different from the Isight formula he eventually adopted.

Note that Isight also uses a “relative” penalty in two other places. The penalties for having fewer checkers off and for needing more crossovers to get home are both based on the difference between you and your opponent. The only penalties in Isight that are not relative are the ones for stacks on the 1pt, 2pt, and 3pt. A side benefit to using relative penalties is that there are fewer adjustments that must be made to a player’s count.

Hope this helps.


Messages In This Thread


Post Response

Your Name:
Your E-Mail Address:

If necessary, enter your password below:




[ View Thread ] [ Post Response ] [ Return to Index ] [ Read Prev Msg ] [ Read Next Msg ]

BGonline.org Forums is maintained by Stick with WebBBS 5.12.