To put in more westernized chess terms, this would be like beating a 2100Elo master without bishops. Yoshio is a professional and very skilled, but he hasn't won a major tourniquet since 1989. Really not an achievement, its nice to see Computer Go advancing.
A 4 stone handicap between master's is massive. The difference between a 9d (dan) and 1d isn't actually 8 stones. With an 8 stone handicap a 1d will play a 9d off the board (provided both are profession dans not amateur). Source http://www.amazon.com/Kages-Secret-Chronicles-Handicap-Go/dp...
Generally I would say that this should put it around US 2-4d (for US Go Association, or KGS online). Maybe 2k-1d in professional amateur circles. I doubt it work warrant a 1-3p 'professional ranking'.
A 4 stone handicap between master's is massive. The difference between a 9d (dan) and 1d isn't actually 8 stones. With an 8 stone handicap a 1d will play a 9d off the board (provided both are profession dans not amateur). Source http://www.amazon.com/Kages-Secret-Chronicles-Handicap-Go/dp...
Generally I would say that this should put it around US 2-4d (for US Go Association, or KGS online). Maybe 2k-1d in professional amateur circles. I doubt it work warrant a 1-3p 'professional ranking'.