The first one is the "early" Hanezeki Exchange of , , after , which was more or less questionable.

After our second throw-in, this exchange can be played much later, because a White move at is no longer sente, as it was in the professional solutions without the second throw-in. So, we corrected our previous sequence.

Concerning the outcome of the later Main Semeai itself, it does not matter, which side gets to play the point of .

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If Black - later in the game - lets White play , this move is gote. So Black can follow the "usual" sequence with , for example.

However, thereafter is sente, this time forcing Black to take himself an own liberty, with . So Black loses the move, he had gained before. Not to mention the three points (163, ), he has given White for free.

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If Black answers with the kikashi of here, to prevent a jigo, he has to play immediately. Again, neither side has won a move, compared to our solution. However, will become an additional prisoner, so Black wins the game by only one point.