losing sente example
Sente or gote is often a large difference: If you do the same thing in gote that could also be done in sente, that is a big difference - you lose a whole move. Players obviously will prefer sente sequences, other things being equal.
An example where this error has been made is in this diagram. Black plays atari with , White answers at , and Black connects at . Black has defended the right hand side here, but would have done better by playing at immediately. This also threatens to capture the two white stones (by playing 2), but if White now answers, Black has sente and can play elsewhere.
Also note that sente is relative: If Black play at here early in the game, White will not answer at , but play elsewhere, because the threat of capturing the two stones is not large enough. Of course, also in this case rather than is still the correct move.
Comment: If the area to the right is Black's, is unlikely to be sente. It would be larger than the threat to take White's stones. -- Bill Spight
Bill: This is not a losing sente. It is not a good example of losing sente instead of keeping it. It is probably an example of making the wrong gote.
Alex Weldon: I think there's some confusion here because of the expression "to lose sente" (lose as a verb) and the noun "a losing sente" (losing as an adjective). No doubt the creator of this page wasn't aware of the second expression and believed he was creating example of "a play that loses sente (when it could have been kept)." Of course, it's still not a good example of that because, as you point out, at high enough levels of play, even the sagari will be gote, since the two-stone capture is relatively small. However, if we switch the example around a bit, we DO get a losing sente example:
If Black plays the right gote move here, and White correctly tenukis, then Black's best local follow-up (not immediately, of course, but in the endgame) would be . is the losing sente, since it gains very little and removes the option of a larger follow-up later.
Of course, almost no one would play like this - anyone who knows enough to play to start with would not play later - but it makes an effective tewari to show why in the first diagram is wrong.
Could please s.o. point out the (a) correct terminology to me?
tderz: What could happen after White's gote -?
The white attachment a is threatening.
If there are white stones around or , then clamp is quite threatening.
Alan, thanks for your example. And TDerz, your construction is nice. - may be sente there.