Level indicators

   

Progress means making fewer mistakes. Some typical mistakes disappear at a certain level. A player of lower rank might get it right, of course, but a player of higher rank never gets it wrong [1].

For example, I noticed that IGS 6k* (3k* at present) quite often make the following error.

[Diagram]

White loses

At some point of the game White decides to save WC. But W1 is a mistake. White cannot play hanetsugi a now: Black has hane b that leaves White with a ridiculous shape.

At IGS 5k* (2k*) level this error did not occur anymore.

[Diagram]

Correct

W1 is the correct way to save WC.

Charles Or at a: White at a means that Black at b is less of a forcing move. But it claims one point less.

Andre Engels I think the difference is considerably less than a point, since after white has played the hane and connection at c, d will be black's sente, taking away that point again. I personally always play a, never W1.

Charles Me too. I could find just one pro example of precisely this position. It seems that Yu Ch'ang-hyeok disagrees with us.

jwaytogo As I recall, my former go teacher, who is 6p, also reccommends "a".


An IGS 1k* indicator that I noticed:

[Diagram]

Black 2 does not happen at IGS 1k* level

The correct reply is sagari at a. The difference is very small, but giving the opponent a chance for a point without strong reason is bad.

Knowing these moves does not make anyone a 1k* or 2k* player. Progress to this level includes many such small points but if anyone misses the correct answer here, he or she is weaker for certain.

[1] Bildstein: I'm 1k* on IGS, and a local 3 dan at my club, who is stronger than me, thinks B2 is correct. I recently heard him explain it to a weaker player, explaining that it could conceivably lose a point, but it leaves the opponent with fewer ko threats than the sagari. This is a counter-example to the "a player of higher rank never gets it wrong" statement. It looks like strength is still an elusive beast.

Vincent: I would play a as an endgame move since there will propbably be few, if any, ko's left. If it is still relatively early in the game I would play B2 using the same reasoning as your 3 dan.

Bill: B2 loses 1/3 point, on average. That is usually more than a ko threat is worth. I think that the 3 dan is getting confused with this kind of situation, where a dominates if there are no kos.

[Diagram]

B2 leaves fewer ko threats



Vincent, early in the game I think you will probably tenuki. :-)


Please, bring and post here some other level indicators.

ilan: I've recently noticed that in some situation where there isn't so much room (for Black here), playing at a gives better prospects for making life.


The idea of a level indicator for me applies in games against an unranked player on the net. How strong would this guy/girl be ?

In the opening you don't see much of an indicator. 2d or 9k, we all imitate pro play in the opening. But suddenly you see something like this:

[Diagram]

White loses

Aha ! The cursed angle play. Now I definitely know my opponent is of the kind that remembers certain shapes, regardless of the opponent's stones. He can't be stronger than 6k. I'll win this one ...

--Dieter

Reading the angle play link, I'm not sure WHY this play is a bad one. Can you please explain why in this situation, angle play was 'cursed' ?

--Anonymous Beginner

The reason they call it a "cursed" angle play is because here it makes the same shape as if you had ignored a shoulder hit.

--Mef

Bill: W1 is not necessarily bad, depending upon the surroundings. However, Black will normally be able to push the White group around, because of its relative weakness. For instance, Black might play at a to make thickness.

This might deserve a mention at common mistakes in fuseki. --Charles

And it is dangerous, some players have what I call an "Internet style" : a lack of theoretical knowledge, but many games played and some fighting strength, mainly in fast games. How irritating to lose against someone who plays such angle plays!

--phenomene


[Diagram]

Corner

There is no black stone around a. Then B2 and B6 are bad moves, but some beginners feel the need to protect the corner this way. (See clumsy double contact.)

No idea exactly what kind of level indicator is this, but I don't think this is seen in the single digit kyus.

--unkx80

Klaus: I have seen an 6 kyu player playing the contact at B2 quite often. (without a stone at a of course, ande he still plays like that even though some players tried to explain the mistake to him...) So I guess it is not an indicator for a double digit kyu.

Paul Clarke: I regularly see both B2 and B6 from players of around British 5kyu strength.


BobMcGuigan: I wonder how well a person's over-the-board strength can be characterized by presence or absence of characteristic moves. Phenomene has mentioned internet players who make theoretically bad moves but win a lot of games because they are good fighters and can handle fast games well. I used to play a lot with a Korean man whose office was down the hall from mine. He had a 3-gup ranking (which he had earned 50 years ago) but had never studied seriously or had formal lessons. He made a lot of bad moves but he was a ferocious fighter and won a lot of games despite the bad moves. I had to respect his brute force strength but I often wondered how much stronger he would be if he knew more about good style.


BlueWyvern: There's one I try not to do, but still do sometimes so I'm not sure what level it disappears at. I've noticed a lot players at my level tend to to play forcing moves that are better left unplayed, either for tactical reasons, or just to save a ko threat. Here is an example....

[Diagram]

Don't do this....

Black wants to play B4: just play it, don't make the B2 W3 exchange. (See One-Two-Three.)

[Diagram]

Comments

unkx80: Or consider B2 to get ahead, usually better than a.

[Diagram]

Comments

Alternatively, tenuki and leave the possibility of B2, which aims at the placement at a.

Charles See also related analysis at aji keshi.


kokiri This last example is something that I have been presented with a few times and really only come completely to terms with recently as a British 4kyu or so. Another lesson that I think marks a similar sort of standard is:

[Diagram]

Black's Gote

Here Black fixes White's shape and is Gote, whereas

Vincent: Gote? Are you sure? I would say white almost has to play a to capture the cutting stone, giving black sente.

[Diagram]

In the 2nd diagram, Black's 5 leaves white to decide, play at a and give up Sente, or leave the potential ladder at b.

Imagist It seems to this lowly 5 kyu that the issue is not whether or not white should capture the cutting stone, but whether black wants white to capture the cutting stone with a net or a ladder. The atari forces the net, while the extension forces the ladder. If black can make use of a ladder breaker in the d area, black should play B5, whereas if thickness toward e would be more useful black should play B5 at c. If it is not yet clear which would be more useful, B5 in the diagram above leaves the situation flexible so that black can choose which move to play later.

[Diagram]

Mixed up?

Chris Hayashida: Is it possible that you are getting the position mixed up with something from this joseki? W6 is proper, a is not.

[Diagram]

Imagist: At the lower levels (my level), this play against a 3-3 invasion usually indicates that someone hasn't devoted much time to joseki.


This is a copy of the living page "Level indicators" at Sensei's Library.
(OC) 2007 the Authors, published under the OpenContent License V1.0.
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