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BGonline.org Forums
Sportive Cubing
Posted By: Daniel Murphy In Response To: Sportive Cubing (Phil Simborg)
Date: Monday, 3 December 2012, at 4:40 p.m.
That's what I have done with "The Simborg Rule" which I think is a major improvement to the game (you can't make a point or run with 6-5 on the opening move). It was used in side events at many tournaments. The players had no problem adjusting, all agreed it made the game more interesting, challenging and fun and took away some of the advantage of getting a great first roll, but I doubt it will ever become the rule of the game. Why? Because it is different. New. Not because it is worse.
The obvious counterobservation is that a reason players might find the rule interesting, challenging and fun is because it is novel, not because it is better.
It does reduce the advantage of the opening roll a little, but the types of positions it creates by forcing major or minor splits are not unfamiliar, since similar positions are reached with normal plays of 63, 62, 54, 52, 51, 43, 41, 32 and 21, and of 64. It makes a difference only on these plays:
Roll Equity with best play Equity with best allowed play difference 31 +0.262 +0.022 (minor split) -0.240 61 +0.184 -0.024 (double split) -0.209 42 +0.204 +0.059 (major split) -0.145 53 +0.113 +0.077 (minor split) -0.036 65 +0.102 +0.066 (major split) -0.036 64 +0.014 +0.011 (major split) -0.003 So the rule reduces the cubeful advantage of winning the opening roll by about 0.045. Winning the opening roll should still be advantageous, perhaps by about +0.040 (the average advantage is about 0.040 cubeless, per rollouts at bkgm.com gi) Equities above are cubeful from Gnubg 4-ply evaluations except for a rollout for 64.
Further reading: http://www.bkgm.com/rgb/rgb.cgi?view+1244
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