Author: blass uri
Date: 00:49:12 10/22/98
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On October 21, 1998 at 23:57:40, Komputer Korner wrote: >Presently there is a huge argument about alternative point scoring systems on >the RGCC. The one that generated the hotly debated proposal was 3 points for a >win and 1 point for a draw. I mistakenly assumed that the proposal was for 1/2 >point for a draw. My original post on RGCC is copied below. However even if you >substitute 1 point for the 1/2 point in the equations below, the advantage ratio >of white will still be larger than under the present scoring system. For proff >of that I repeat the equations below with the 1 point for a draw. >White expects (3*0.31) + 1*0.50)= 1.43 points. Black expects (3*0.19) + >(1*0.50)= 1.07 points. The white to black ratio becomes 1.336448 which is >between the new ratio below (which mistakenly assumed 1/2 point for a draw) and >the old present rules ratio. The probabilties are not right I checked the ssdf games and I found something near 30% draws. I do not know about 50% draws in low levels and you said that the proposal was not about GM games > > >"It will only increase the advantage of playing white which is already >large enough. White players enjoy a 56-44% advantage. Assuming 50% of >games are draws (the advantage of playing white will be even more >under your new system if you assume less draws), this means that the >spread is 50% draws, 31% white wins and 19% black wins. If you give 3 >points for a win and 0.5 points for a draw , > white's expected score >will be now (3*0.31) + (0.5*0.50) = 1.18 points every game. >Black players will now expect (3*0.19) + (0.5*.50) = 0.82 points every game. I do not agree because the players will play differently and the probabilities can change to 40% for white and 27% for black In this case white expected score: 3*0.40+1*0.23=1.43 black expected score 3*0.27+1*0.23=1.04 Uri
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