Pro game backwards, Game 1, moves 219 to 248
Bill: I believe that - is a 3 point sente. At first blush, it looks like a 4 point sente. would gain 2 points for the stone plus the 2 points, but if White has played at , Black will connect at a instead of when White saves the stone. Then White would get the 4th point only by playing the 1 point gote at .
(Actually, things are a bit more complicated. It is possible that some lines of play on the right side will affect the point on the fourth line, and I calculated the play with that in mind, but I still get to be a 3 point sente.)