(;FF[4]
CA[UTF-8]
GM[1]
GN[Becoming 9 Kyu - Lesson 32]
PC[https://online-go.com/review/424261]
PB[Black]
PW[White]
BR[2d]
WR[2d]
OT[Error: time control missing]
RE[?]
SZ[19]
KM[6.5]
RU[Japanese]

(;AB[sq]
;AB[sp]
;AB[rp]
;AB[ro]
;AB[sn]
;AB[rm]
;AB[qn]
;AB[pm]
;AB[pn]
;AB[po]
;AB[pp]
;AB[pq]
;AB[pr]
;AW[rq]
;AW[sr]
;AW[rs]
;AW[qr]
;AW[qq]
;AW[qp]
;AW[qo]
;AW[on]
;AW[ln]
;AW[lp]
;AW[mq]
;AW[hp]C[Hi! Here, we'll look at tesuji for invading your opponent's territory. When invading, here's a tip: You should identify your opponent's weaknesses. If you do this, you'll be able to take advantage of those weaknesses more effectively.

Let's look at an example. Let's see how Black can invade White's territory now.]
(;B[nr]C[This one-space jump is not the answer. It's too small.]
)(;B[ms]C[The monkey jump is also not the answer.]
;AE[ms]C[If you look at the corner carefully, White has a weakness.]
;AB[ps]C[First, Black can descend in sente.]
(;W[qs]
;B[ls]C[After that, if Black can jump this far, it will be better than the other two moves. It looks too far from the black group, but White can't separate Black.]
(;W[nr]C[If White diagonals,]
;B[ns]C[Black can connect by attaching here.]
)(;W[mr]C[This move doesn't cut Black either.]
;B[ms]
)(;W[ns]C[In response to this move,]
;B[nr]C[Black can attach and capture the stone.]
)(;W[lr]
;B[ms]
;W[ks]
;B[nr]
;W[kr]
))(;AE[ps]C[But you can do even better than Q1! Let's look for another move. Some of you already found it. :)]
;AB[os]C[Some of you already came up with this diagonal. If you did, you have a good sense of tesuji. After this, it's hard for White to play elsewhere.]
(;W[cc]
;B[qs]C[This throw in is Black's aim. It's a ko.]
;W[ps]C[It's a ko in which Black has nothing to lose.]
)(;W[qs]C[So White has to connect here.]
;B[lr]C[After that, Black can slide this far into White's area. It's a reverse monkey jump.]
;W[mr]
;B[ms]
;W[kr]C[White should push and attach like this.]
(;B[ks]C[This hane is a good follow up for Black. ]
;W[jr]C[After White stretches,]
;B[js]C[Black can push here again in sente.]
)(;B[jr]C[Black can also attach here if Black has many ko threats.]
;W[lq]C[To separate Black, White has to atari here.]
;B[ks]C[After that, Black can start a ko to destroy White's territory. This is a situation that you'll be likely to see in actual games. ]
)))))(;AW[cc]
;AW[cd]
;AW[dd]
;AW[fc]
;AW[fd]
;AW[ge]
;AW[ee]
;AW[ef]
;AW[eg]
;AW[dg]
;AB[ch]
;AB[bf]
;AB[be]
;AB[bc]
;AB[cb]
;AB[dc]
;AB[ec]
;AB[ed]
;AB[de]
;AB[df]
;AB[hc]
;AB[id]
;AB[je]
;B[le]C[Let's look at another similar example. White should reduce this area as much as possible.]
(;W[gb]C[This diagonal isn't good enough.]
)(;W[fb]C[Many players would descend and play a monkey jump.]
(;B[db]
;W[ia]C[Like this. But White can do more.]
)(;AE[fb]C[If you look at the corner closely, you'll see that the three white stones are dead. But you can still make good use of them.]
(;AW[db]C[It might be hard, but this cut is a good tesuji.]
;B[eb]C[Black has to play here.]
;W[fb]C[Then White ataris again.]
;B[da]C[After Black captures,]
;W[fa]C[Descending here is sente.]
;B[ea]C[If there's a forcing move on the first line, you can often find a good follow up.]
(;W[ib]C[After this, you can jump into Black's territory.]
)(;W[ja]
;B[ib]
))(;AW[bb]C[Some of you mentioned this cut.]
;B[ce]
;W[db]
;B[bd]C[But it doesn't help you break Black's territory. It does, however, take a bite out of the corner. So you can decide what is more important to you in your game.]
)))))