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BeginnersEndgameExercise2/Solution
Sub-page of BeginnersEndgameExercise2
Knowing that this is a problem, you can easily guess White's play.[1] If White played at a instead,
It may not be obvious, but
If White takes Black's stones, the result is -4.
Now White plays This shows the beauty of White's original play. Because of that sacrifice, Black cannot save his three stones. Because the effect of White's sacrifice depends upon White's later play where one of White's original stones was, this kind of play is referred to as an under the stones play.
The question now is subsequent play.
Black has captured 4 White stones, while White has captured 3 Black stones and has 3 points of territory. Result: -2.
The number of stones each side has captured is the same as above, but White has 1 point less territory. Result: -1. Making a sente play as sente does not change the local count. So all of the positions below, along with the captured stones, have the same count.
3 Black prisoners, 4 White prisoners.
4 White prisoners.
Since White can gain 1 point by playing first, this is a 1 point Black sente.
Since White can gain 3 points by playing first, this is a 3 point Black sente.
If Black plays first the local count is +6. If White plays first it is -1. The local count for the original position is their average, or 2 1/2. A play by either player gains 3 1/2 points, on average. This is a gote. [1] An example of the proverb, The opponent's move is my move. This is a copy of the living page "BeginnersEndgameExercise2/Solution" at Sensei's Library. ![]() |