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6

In the deviated form, white can play at B18 and the corner will live or die as a ko, or it can end up in seki. Even if black has more than enough ko threats to win the battle, it is unlikely ever worth it. $$Wcm4 Continuation of deviation: Ko $$ +---------------------------------------+ $$ | 7 . 3 6 5 . . . . . . . . . . . . . . | $$ | 2 1 a X X O . . . . ...


6

Josekipedia http://www.josekipedia.com/ This is a kind of wiki for joseki. This system has the big advantage of offering explanations, deviations from joseki and refutations,... But I don't know how complete or accurate it is.


5

This question may look simple at first, but refuting the deviation is pretty difficult - there are no original sources on this to my knowledge. Not answering the hane directly $$Bcm1 $$ ------------------- $$ . . . . . . . . . | $$ . . . . . . . . . | $$ . . . . a 0 4 8 . | $$ . . . . b 1 5 6 . | $$ . . . . . . 9 7 . | $$ . . . . . . 2 . . | $$ . . . . . . ...


5

Brugo http://www.brugo.be/ Brugo is probably the only dictionary maintained by pros. It includes a few variations not seen anywhere else and tends to be very reliable (as far as I can confirm this). There are a few tools (like a joseki quiz) rarely found anywhere else.


5

Kogo's Joseki Dictionary Kogo's Joseki Dictionary is certainly the best known resource in the west. It's an SGF file that contains a huge list of common and uncommon joseki moves including some comments, some even with the game where they occurred. It is reliable in general, even though there are some mistakes (that are probably difficult to spot unless ...


4

White's connection and pincer sequence in another answer works well only if White has a stone (or stones) around the star point D16 in the upper left corner. Then, the 7th stone on J16 is both a pincer and an extension. $$Wcm1 Good for W $$ +-------------------+ $$ |...................| $$ |...................| $$ |...........2.1.....| $$ ...


4

First, let's notice that b in the following: $$Bcm1 $$ ------------------- $$ . . . . . . . . . | $$ . . . . . . . . . | $$ . . . . a 0 4 8 . | $$ . . . . b 1 5 6 . | $$ . . . . . . 9 7 . | $$ . . . . . . 2 . . | $$ . . . . . . . . . | $$ . . . . . . 3 . . | $$ . . . . . . . . . | reverts to a well known joseki where 10 is played before 6. It seems ...


3

It is difficult to tell if the pincer at 3 was the right choice. Generally, such a wide pincer is good if you plan on a moyo on the right side. I'm assuming that W1 was in the upper left and B2 a hoshi in the lower right, as in this: $$Wcm1 $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . ...


3

Daily Joseki http://dailyjoseki.com/browse This joseki database is condensed from a database of pro-games. One problem with this approach is that it doesn't contain any explanations or refutations. It also offers some joseki memorization system, but I never tried it myself.


3

Good question. White usually jumps into the corner in this joseki; if he jumps out he is ready to fight if necessary. When Black peeps he is giving you a wall that you can use to counterattack his pincer stone. eidogo recommends W7, which denies Black a base on the side while being harder to press down. $$Wcm1 $$ +-------------------+ $$ ...


2

W1 seems like a good move to me. B can't get a rhythm to fight well even if he ignores it to make something happen. I may be wrong but B's deviation looks like a gross overplay to me. I can't see W playing a "solid be get better result" so starting a fight seems good for W. The only other option I can think of, other than W1, is the 5th line shoulder hit ...


2

The attachment is fine but B will resist in a different way, I guess (maybe pushing?). $$W Attachment, black resists $$ ------------ $$ -........... $$ -.OX........ $$ -.OOXXO..... $$ -..XOX..1X,. $$ -...O2...... $$ -...34...... $$ -........... In the (expected) variation move 2 shouldn't be a jump, rather a nobi (extension) to get a more solid shape, ...


2

When White hanes at 10, you need to play 11 at 13, then connect after he does. You cannot answer a contact move with a non-contact move in this situation (and most others).


2

This is in Josekipedia, just with a different move order. (I don't know how to link to a specific josekipedia variation, but taking the moves as numbered in your question and reordering 1, 2, 3, 4, 5, 10, you can see your marked stone as a bad move, with 2 ways to punish. A hane at P17 is standard for a 3-3 invasion without an approach stone, but you cannot ...


2

That should be simple - don't play at 14 in your final diagram. Instead, try this: $$Bm7 $$ . . . . . . . . . . . | $$ . . . . . . . . . . . | $$ . . . . . . . . . . . | $$ . . . . . . . . . . . | $$ . . . . . . . . O . . | $$ . . . . . . . B . . . | $$ . . . . . . . 7 X 5 . | $$ . . X . 8 . O 3 O 1 . | $$ . . . . . . . 6 4 2 . | $$ . . . . . . . . . . . | ...


1

a is not the joseki move b is do tewari black starpoint white kakari black pincer white invade 3-3 black blocks white nobi (move 10) black b then black hane and connect before jump



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