(;PB[Iwamoto Kaoru]BR[8 dan]PW[Go Seigen]WR[8 dan]DT[1948-07-7,9]PC[Tokyo, Japan]RE[W+1]KM[]SO[]SZ[19]C[This game is famous for the result given above. At the end of the game Iwamoto maintained that he did not have to add an extra stone at the point A in the diagram, losing a point, as he had more ko threats than White. Go believed that the ko had to be resolved regardless of whether he could win it or not. Go had won the game anyway, but since the referee could not resolve the dispute, the result was published as shown above. 

Some days later it was discovered that many years earlier, in Shusai’s time, a committee of the Nihon Kiin had made a ruling on this type of position which agreed with Iwamoto’s argument, so the official result became a win by one point. 

However, the rules of go promulgated the next year by the Nihon Kiin took the opposite view, requiring all direct kos to be eliminated at the end of the game. Had these rules been in effect in 1948 Go would have won by two points. 
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