(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[0.00]
PW[baduk]PB[movies]C[Parts of this sgf file are written by Jack Jin, 2p, jackjin1988 at hotmail dot com
Please ask him for permission of you want to re-use this material.]
(;B[qd]
;W[od]
;B[ld]
;W[ph]C[Do you remember this very large knight's move from episode 10? The Daidaigeima (大大ゲイマ).

])
(;B[pd]
;W[dp]
;B[pp]
;W[dd]
;B[fc]
;W[cf]
(;B[id]C[With the ogeima, black leaves some weaknesses behind.]
(;W[kc]C[White can invade here to attack blacks base.])
(;W[hc]C[Weak point of the shape.]))
(;B[jd]LB[fc:1][jd:2]C[But what about the daidaigeima?
It occurs frequently in progames, often in this such a formation. Do you know its weaknesses?
]
;W[qf]
;B[qh]
;W[qc]
;B[pc]
;W[qd]
;B[pe]
;W[rf]
;B[og]LB[hc:A]C[Let's start from this position, a common one.
The main weakness of the daidaigeima is the gap at A. ]
;W[hc]LB[dc:D][jc:C][gd:E][hd:A][he:B]C[When whte invades, black has a variety of ways to answer. Ranging from A to E. 

Let's start with black A in this episode. ]
(;B[hd]LB[ic:B][id:A]C[This is locally the most powerful way to respond, and it is also the most common one.

White can continue by playing at A or B. 

Locally playing at A is the most efficient move.
White A requires 2 favourable ladders. If one of the ladders is good for black, white should play B instead.]
(;W[gd]C[Note that this hane by white is wrong. ]
;B[gc]
;W[id]
;B[he]
(;W[ie]
;B[ic]C[White gets cut off and is in trouble. ]
;W[hb]
;B[ib])
(;W[ic]C[Also bad for white.]
;B[ie]
;W[jc]
;B[kc]
(;W[kd]
;B[je]
;W[lc]C[White can not capture the black stone. ]
;B[kb]
;W[lb]
;B[jb]C[He has a lack of liberties and ends up catured himself. ])
(;W[kb]C[Hane on the second line is the only move. ]
;B[kd]
;W[lb]
;B[hb]C[This result is painful. White is not alive, and black is strong in the surroundings.

])))
(;W[id]LB[og:A]C[White needs to have a favourable ladder. Or to be exact: 2 ladders. 



]
;B[ic]
;W[ie]
(;B[jc]C[The first ladder.]
;W[gd]C[Good for white, since white has the ladder now. But if black has the ladder...]
;AE[hc][ic][jc][gd][hd][id][ie]
;B[cn]
;W[fq]
;B[bp]
;W[cq]
;B[ck]LB[ck:A]C[A is a ladder breaker.]
;W[hc]
;B[hd]
;W[id]
;B[ic]
;W[ie]
;B[jc]
;W[gd]
;B[he]C[Black can extend.]
;W[gc]
;B[if]C[This is not good for white. ])
(;B[hb]C[The second ladder. ]
;W[jc]
;B[gc]
;W[ib]
;B[hc]
(;W[kd]
;B[je]LB[pf:B][og:A]C[Black can go out in this case, because A breaks the ladder. 
When black A is at B instead (another joseki choice) the ladder will be good for white.]
;AE[hb][ib][gc][ic][jc][hd][id][kd][ie][je][og]AW[hc]AB[pf]LB[hd:A]SQ[pf]C[When the marked stone is in place, the ladders will be good for white.

]
;B[hd]C[Dubious.]
;W[id]LB[ic:A]C[White can wedge because the ladder is good.

Cutting at A is therefore dubious for black. 

]
(;B[ie]C[Black usually blocks from this side.]
;W[ic]LB[jc:A]
(;B[jc]C[This block is one of the main joseki choices.]
;W[gd]
;B[he]
;W[gc]
(;B[je]C[Proper. Black fixes his cutting point.]
;W[fd]C[White usually plays here. In some cases white can choose to play tenuki too.

With blacks two walls facing eachother from a close distance, black is slightly overconcentrated in this situation. 

White's corner territory is better than black's influence.])
(;B[ge]C[Wrong!
This sort of play is vulgar. A lot of players make this mistake.]
;W[fd]LB[je:1]C[White is safe. Black still has a cutting point at 1. ]))
(;B[gd]C[Black can choose to play here, but this allows white to make a living group at the top and destroy blacks territory.]
;W[jc]
;B[kd]
;W[kc]
;B[ld]
;W[mb]C[Satisfactory for White.]
;B[hf]C[Black ususually fixes his weaknesses. White ends up in sente too!]))
(;B[ic]C[A special strategy.]
;W[ie]
;B[he]C[This move prevents the ladder.]
;W[jc]
;B[ib]
;W[if]
;B[kd]
;W[hf]
;B[fe]LB[hb:A][jb:B][lc:C]C[A sort of joseki shape. Black has weaknesses around A to C]))
(;W[oh]C[Tricky ladder breaker.]
;B[je]C[However, black can respond calmly.]
;W[pg]
;B[ng]
;W[ph]LB[qh:A]C[Eventhough A is cut off, this result is still good for black.])))
(;W[ic]LB[jc:A][id:B]C[Black can again choose: A or B. ]
(;B[jc]C[Reverts to a previous diagram.]
;W[id]
;B[ie]
;W[gd]
;B[he]
;W[gc]
;B[je]
;W[fd]C[Playable, but a little better for white here.])
(;B[id]C[More usual. ]
;W[jc]LB[dc:C][gc:B][kc:A]C[Black has three options.
C is the most common.  



]
(;B[kc]
(;W[kb]
;B[gc]C[Blocking from this side puts pressure on the white group]
;W[lc]
;B[kd]C[White still has to make life.]
;W[mb]
;B[hb]
(;W[ib]C[A common mistake. ]
;B[ia]
;W[jb]
;B[md]
;W[qb]
;B[pb]C[The group at the top will be at risk.]
;W[gb]C[Black can make a ko for the life of the whole group.]
;B[ga]C[Ko!])
(;W[ia]C[The correct move.]
(;B[me]C[This keima is important for black. 
If white gets this point, there is no potential in the centre anymore and blacks right group will become weak. ]
(;W[qb]C[The extension is necessary. ]
;B[cc]C[An OK result for both. ])
(;W[db]C[Wrong. If white does not spend one more move in the upper right, there will be a severe attack on whites groups. ]
;B[qb]C[Black attacks two groups at the same time.]
;W[rb]
;B[ob]
;W[ib]C[White has to come back to live. ]
;B[ra]C[Painful corner for white.]
;W[rh]
;B[ri]
;W[qi]
;B[qg]
;W[rg]
;B[rj]C[It is hard for white. ]))
(;B[jq]C[Tenuki is wrong. ]
;W[me]C[Painful.])))
(;W[gc]
;B[gd]
(;W[kb]
;B[lc]
;W[ec]C[Powerful Tesuji! black can not extend onto the second line.
]
(;B[fb]C[Wrong.]
;W[fd]
;B[gb]
;W[hb]C[The three black stones are captured.]
;B[lb]
;W[jb]
;B[ia]
;W[ha]C[Black has 3 liberties, white has 4. ])
(;B[fd]C[Old joseki. Suboptimal.]
;W[fb]
;B[eb]C[There is still a lot of aji in this corner. 
]
(;W[ga]
;B[df]C[This contactmove is an interesting trick play.
]
(;W[dg]C[This looks natural, but is the wrong response. White is tricked. ]
;B[de]
;W[ce]
;B[dc]
;W[ed]
;B[cd]
;W[ee]
;B[ef]C[Ladder.])
(;W[cg]C[Extending is also wrong. ]
;B[dc]
;W[ed]
;B[cd]
;W[db]
;B[ee]
;W[cc]
;B[de]
;W[ea]
;B[ce]C[Painful.])
(;W[de]C[Also suboptimal. ]
;B[cg]
;W[bf]
;B[ef])
(;W[ce]C[Correct. White has to play solid. ]
;B[dh]C[Black can switch tactics and go for the centre.]))
(;W[db]C[Another choice. ]
;B[lb]C[However, that will make this black block sente. ]))
(;B[de]C[Not that long ago Gu Li 9p came up with this solution for black. 
White needs to be very careful how to respond. ]
(;W[ce]C[Wrong.]
;B[ed]
;W[fb]
;B[dc]
;W[fd]
;B[cd]C[Catastrophe.])
(;W[ee]
;B[fd]
;W[fb]
;B[ed]
;W[dc]
;B[ce]C[Catastrophe too. ])
(;W[cd]C[Correct. This move looks passive, but it's the only one. ]
;B[ed]
;W[fb]
;B[fd]
;W[db]
;B[dg]C[Black can gain strength on the outside for free.])))
(;W[ec]C[White can play here immediately too. ]
;B[fd]
;W[fb]
;B[eb]
;W[ga]
(;B[kb]
;W[dc]C[An even result, according to "A Dictionary of Modern Fuseki - The Korean Style" by the Kiseido Publishing Company.])
(;B[db]C[An agressive sequence.

]
(;W[cc]C[Wrong. This will be a ko. ]
;B[cb]
;W[bc]
;B[jb]
;W[bb]
;B[ib]
;W[hb]
;B[ea]
;W[dc]
;B[fa]
;W[ca]
;B[gb]C[White has no ko threats in the fuseki. ])
(;W[kb]C[Correct. An exchange.]
;B[cd]
;W[ce]
;B[cc]
;W[lc]
;B[kd]
;W[di]C[Also playable.])))))
(;B[gc]LB[kc:A]C[This can become almost the same as the variation when black plays hane at A immediately. 
However, white has options. 

]
(;W[lc]C[Wrong. This jump is a mistake by white. 




]
(;B[kc]C[Wrong too. 
If black wedges, we return to the same position we just saw.]
;W[kb]
;B[kd]
;W[mb]
;B[hb]
;W[ia]
;B[me]LB[kb:2][kc:1]C[Playable for both. Note that black exchanged 1 for white 2. ])
(;B[kd]C[Correct. Extending is the right move. ]
;W[mb]
;B[hb]
;W[ia]
;B[me]LB[kb:A]C[If white plays the same variation, black is better than in the previous variation.
In this situation black can still peep at A which is a vital point, threatening the life of the white group]))
(;W[mb]C[Wrong too. 
]
;B[kc]C[Black flattens white.]
;W[kb]
;B[lc]
;W[lb]
;B[hb]
;W[ia]
;B[qb]
;W[rb]
;B[ob]LB[lb:B][rb:A]C[White is under huge pressure again. Attacking the A or B group is miai for black. ])
(;W[kc]C[Correct. ]
(;B[le]
;W[mb]
;B[qb]
;W[rb]
;B[ob]
;W[qa]C[In this variation black can't attack whites group at the top, so this is ok for white. ])
(;B[mc]C[If black wants to attack white immediately, it will be risky for black. ]
;W[kd]
;B[kf]
;W[md]
;B[nc]
;W[lf]LB[gd:A]C[Because there is a severe cutting point at A, it is impossible for black to kill white. ])
(;B[cc]C[Black can get the corner first. ]
;W[dc]
;B[db]
(;W[cd]C[Wrong. ]
;B[bb]
;W[bc]
;B[cb]
;W[ci]
;B[mc]
;W[kd]
;B[kf]LB[gd:A]SQ[fc][gc]C[Now the cut at A is not severe anymore, since the marked stones are already alive. This would be bad for white.])
(;W[eb]C[Blocking from this side is good. ]
;B[cb]
;W[ec]
(;B[be]C[Normal continuation.]
;W[ce]
;B[bf]
;W[gb]
;B[kd]C[Playable for both. ])
(;B[cd]C[Another choice.]
;W[ce]
;B[fb]C[Cut!]
;W[ea]
;B[fe]
;W[ef]
;B[bd]
;W[le]C[A difficult fight for both. 
If you like fighting, this might be for you.])))))
(;B[dc]C[This tricky move is the most common response for black. ]
(;W[cc]C[Blocking is a mistake!]
;B[kc]
;W[kb]
;B[lc]
;W[lb]
;B[mb]
;W[gc]
;B[gd]LB[cc:2][dc:1][ec:A]C[Note that at this point white can't play at A anymore to link up his stones.

The exchange of black 1 for white 2 prevents this. ]
(;W[fb]
;B[eb]
;W[fd]
;B[ec]
(;W[ed]C[Wrong. ]
;B[gb]
;W[hb]
;B[fa]
;W[cb]
;B[ia]
;W[ha]
;B[jb]C[White dies. ])
(;W[fe]C[Wrong.]
;B[gb]
;W[hb]
;B[fa]
;W[mc]
;B[md]
;W[nc]
;B[nb]
;W[kd]
;B[ld]
;W[ke]
;B[le]
;W[nd]
;B[ne]
;W[lf]
;B[me]
;W[je]
;B[ie]
;W[if]
;B[jf]
;W[kf]
;B[hf]
;W[ig]
;B[hg]
;W[hh]
;B[gg]C[White can't capture black. ])
(;W[ga]C[Best, but still not great. ]
;B[ed]C[White can't be satisfied. ]))
(;AE[cc][dc]
;W[ec]C[Like this white could link up. ]))
(;W[kd]C[The proper move for white. ]
(;B[cc]
(;W[lc]C[This is a trade, playable for both. ])
(;W[ke]C[Extending is a mistake. ]
;B[lc]C[This peep can later become severe. ]
;W[kc]
;B[lb]TR[hd][id][jd]C[Depending on the surroundings and the stability of the marked stones, white is heavy and without a base. ]))
(;B[cd]
(;W[lc]
;B[de]C[Black becomes very thick. ])
(;W[cc]C[Whites crosscut is an overplay. ]
;B[de]
;W[ed]
;B[ec]
;W[ce]
;B[bd]LB[bc:A][ee:B]C[A and B are miai for black. ])
(;W[de]C[White needs to extend. ]
;B[cc]
;W[lc]LB[cd:A][de:B]C[It is very hard to say if the exchange of black A for white B is good for black or white. ])))))))
(;B[fe]C[Wrong.]
;W[jb]
(;B[kc]
;W[kb]
;B[lc]
;W[id]LB[fe:A]C[White is comfortable. Black A is weak. ])
(;B[hd]C[Blocking white from this side also ends up better for white. ]
;W[ic]
;B[id]
;W[lc]C[White is comfortable. ])))))