How to celebrate new years as a SDK.

judicata · **#41**

Chew Terr wrote:

Edit: Darn, Red beat me to it. Well, I'm going to go ahead and post mine too, as it goes into slightly more explanation of the ideas.
Edit edit: Okay, Judicata also beat me to it. I type like molasses. And molasses uses hunt&peck...

Yeah, but you have more explanation. The OP could skip mine and Red's posts and just read yours.

Marcus · **#42**

Many people have added notes, but here's my own little mini thing.

There are a couple of interesting thoughts concerning the hane at :b46:

, but first a quick note on your last diagram:

Click Here To Show Diagram Code: [go]$$B 8 played at a or b depending on surrounding stones $$ | . . . . . . . . . $$ | . . . . . . . . . $$ | . . . . . . . . . $$ | . . . . . . . . . $$ | . . . . . . . . . $$ | . . . . . . . . . $$ | . . 2 O . . . . . $$ | . a 1 3 4 6 c . . $$ | . . . . 5 7 b . . $$ | . . . . . . . . . $$ --------------------[/go]

b is wrong. It should be at c. Here's the joseki:

Click Here To Show Diagram Code: [go]$$B 3-3 invasion part 1 $$ | . . . . . . . . . $$ | . . . . . . . . . $$ | . . . . . . . . . $$ | . . . . . . . . . $$ | . . . . . . . . . $$ | . 0 . . . . . . . $$ | . 9 2 O . . . . . $$ | . . 1 3 4 6 8 . . $$ | . . . . 5 7 . . . $$ | . . . . . . . . . $$ --------------------[/go]

Click Here To Show Diagram Code: [go]$$Bm11 3-3 invasion part 2 $$ | . . . . . . . . . $$ | . . . . . . . . . $$ | . . . . . . . . . $$ | . . . . . . . . . $$ | . . 2 . . . . . . $$ | . O . . . . . . . $$ | . X O O . . . . . $$ | . 1 X X O O O . . $$ | . . . . X X b . . $$ | . . . . . . . . . $$ --------------------[/go]

To understand why playing b instead of :w8:

is correct, we should examine why it is necessary to play :w12:

. Suppose we omit :w12:

Click Here To Show Diagram Code: [go]$$Bm11 3-3 white 12 omitted, variaton 1 $$ | . . . . . . . . . $$ | . . . . . . . . . $$ | . . . . . . . . . $$ | . . . . . . . . . $$ | 9 3 6 . . . . . . $$ | 4 O 5 7 . . . . . $$ | . X O O 8 . . . . $$ | . 1 X X O O O . . $$ | . . . . X X b . . $$ | . . . . . . . . . $$ --------------------[/go]

Click Here To Show Diagram Code: [go]$$Bm11 3-3 white 12 omitted, variaton 2 $$ | . . . . . . . . . $$ | . . . . . . . . . $$ | . . . . . . . . . $$ | . 7 . . . . . . . $$ | . 3 4 . . . . . . $$ | 5 O 6 . . . . . . $$ | . X O O . . . . . $$ | . 1 X X O O O . . $$ | . . . . X X b . . $$ | . . . . . . . . . $$ --------------------[/go]

Without the defense of :w12:

, Black can clamp and escape. White will have to struggle to keep Black contained.

With that being said, why is this important for understanding :w8:

? Let's look.

Click Here To Show Diagram Code: [go]$$B 3-3 invasion part 1 $$ | . . . . . . . . . $$ | . . . . . . . . . $$ | . . . . . . . . . $$ | . . . . . . . . . $$ | . . . . . . . . . $$ | . 0 . . . . . . . $$ | . 9 2 O . . . . . $$ | . . 1 3 4 6 . . . $$ | . . . . 5 7 8 . . $$ | . . . . . . . . . $$ --------------------[/go]

Click Here To Show Diagram Code: [go]$$Bm11 3-3 invasion part 2 $$ | . . . . . . . . . $$ | . . . . . . . . . $$ | . . . . . . . . . $$ | . . . . . . . . . $$ | . . 2 . . . . . . $$ | . O . . . . . . . $$ | . X O O a . 7 . . $$ | . 1 X X O O 5 6 . $$ | . . . . X X O 3 . $$ | . . . . . . 4 . . $$ --------------------[/go]

What we find out is that the clamp can be used on this side with a similar result. Because we must play :w12:

to defend, we don't want to leave a weakness for Black to take advantage of on the other end of our chain of White stones.

Now, on to the next topic:

Click Here To Show Diagram Code: [go]$$B 3-3 after Knight's approach, part 1 $$ | . . . . . . . . . $$ | . . . . . . . . . $$ | . . 2 . . . . . . $$ | . . . . . . . . . $$ | . . 1 . . . . . . $$ | . 8 0 . . . . . . $$ | . 7 4 O 6 . . . . $$ | . 9 3 5 a . . . . $$ | . . . . . . . . . $$ | . . . . . . . . . $$ --------------------[/go]

Click Here To Show Diagram Code: [go]$$Bm11 3-3 after Knight's approach, part 2 $$ | . . . . . . . . . $$ | . . . . . . . . . $$ | . . O . . . . . . $$ | . . . . . . . . . $$ | . . X . . . . . . $$ | . O O . . . 2 . . $$ | . X O O W . . . . $$ | . X X X a 1 3 . . $$ | . . . . . . . . . $$ | . . . . . . . . . $$ --------------------[/go]

I won't go into all the details on this joseki, but this is one possible variation. The point in question is why :w6:

(also marked :wc:

) is not at a. You saw the result in your game.

Click Here To Show Diagram Code: [go]$$B 3-3 after Knight's approach, tricked? $$ | . . . . . . . . . $$ | . . . . . . . . . $$ | . . 2 . . . . . . $$ | . . . . . . . . . $$ | . . 1 . . . . . . $$ | . . . . . . . . . $$ | . b 4 O a . . . . $$ | . 7 3 5 6 . . . . $$ | . . . . . . . . . $$ | . . . . . . . . . $$ --------------------[/go]

With

in place, Black uses :b7:

to strengthen his group before attacking at the cut at a. The idea is that White will play at b to try and keep Black surrounded. You did this in your game. You have another option ... play at a yourself.

Click Here To Show Diagram Code: [go]$$B 3-3 after Knight's approach, maybe not tricked $$ | . . B . . . . . . $$ | . . . . . . . . . $$ | . . 2 . . . . . . $$ | . . . . . . . . . $$ | . . 1 . . . . . . $$ | . . . . . . . . . $$ | . 9 4 O 8 . . . . $$ | . 7 3 5 6 . . W . $$ | . . . . . . . . . $$ | . . . . . . . . . $$ --------------------[/go]

In the game, you had a stone already where :wc:

is in the above diagram (and your opponent had a stion where :bc:

is ). So, for you this sequence would end up with your sente, as your group is safe. Black's corner isn't really all that big, and the shape isn't great for him.

There are a couple more variations that are interesting. Suppose :wc:

above was one space higher?

Click Here To Show Diagram Code: [go]$$B 3-3 after Knight's approach, Black forgot about surrounding stones, part 1 $$ | . . B . . . . . . $$ | . . . . . . . . . $$ | . . 2 . . . . . . $$ | . . . . . . . . . $$ | . . 1 . . . . . . $$ | . . . . . . . . . $$ | . 8 4 O 9 . . W . $$ | . 7 3 5 6 0 . . . $$ | . . . . . . . . . $$ | . . . . . . . . . $$ --------------------[/go]

Click Here To Show Diagram Code: [go]$$Bm11 3-3 after Knight's approach, Black forgot about surrounding stones, part 2 $$ | . . B . . . . . . $$ | . . . . . . . . . $$ | . . O . . . . . . $$ | . . . . . . . . . $$ | . . X . . . . . . $$ | . . . 1 2 4 6 . . $$ | . O O O X 3 5 W . $$ | . X X X O O 7 9 0 $$ | . . . . . . 8 . . $$ | . . . . . . . . . $$ --------------------[/go]

catches Black in a ladder ... disaster for Black!

One more variation, which might be useful to know:

Click Here To Show Diagram Code: [go]$$B 3-3 after Knight's approach, different punishment, part 1 $$ | . . B . . . . . . $$ | . . . . . . . . . $$ | . . 2 . . . . . . $$ | . . . . . . . . . $$ | . . 1 . . . . . . $$ | . 8 0 . . . . . . $$ | . 7 4 O . . . . . $$ | . 9 3 5 6 . . W . $$ | . . . . . . . . . $$ | . . . . . . . . . $$ --------------------[/go]

Click Here To Show Diagram Code: [go]$$Bm11 3-3 after Knight's approach, different punishment, part 2 $$ | . . B . . . . . . $$ | . . . . . . . . . $$ | . . O . . . . . . $$ | . . . . . . . . . $$ | . . X . . . . . . $$ | . @ @ . 5 . . . . $$ | . X @ @ 3 4 . . . $$ | . X X X O 1 . W . $$ | . . . . 2 . . . . $$ | . . . . . . . . . $$ --------------------[/go]

Here, White has caused himself grief with his :ws:

stones in trouble. The better way to defend:

Click Here To Show Diagram Code: [go]$$Bm11 3-3 after Knight's approach, different punishment, part 2 $$ | . . B . . . . . . $$ | . . . . . . . . . $$ | . . O . . . . . . $$ | . . . . . . . . . $$ | . . X . . . . . . $$ | . O O . . . . . . $$ | . X O O 4 2 . . . $$ | . X X X O 1 . W . $$ | . . . . 3 5 . . . $$ | . . . . . . . . . $$ --------------------[/go]

This is a bit subtle, but is highlighted when :wc:

is sitting there ... let's add :wc:

to the result of what's considered joseki

Click Here To Show Diagram Code: [go]$$W 3-3 after Knight's approach, later reduction $$ | . . . . . . . . . $$ | . . . . . . . . . $$ | . . O . . . . . . $$ | . . . . . . . . . $$ | . . X . . . . . . $$ | . O O . . . . . . $$ | . X O O W . . . . $$ | . X X X 2 X . W . $$ | . . . 4 1 3 5 . . $$ | . . . . . . . . . $$ --------------------[/go]

Now,

isn't supposed to be played immediately, but is something you have as a reduction later. In the previous diagram, Black has removed this weakness.

There are many, many variations of the 3-3 invasion. It's something that I think deserves some study from time to time for most DDK and even SDK players.

SinK · **#43**

This is great. Thanks guys for taking the time to explain all this stuff to me. I think I'm gonna have to go over it a few time to make sure it all sinks in.

SinK · **#44**

I've lost some traction over the last few days and have found it quite hard to make myself play. I'm hoping tonights teaching game with Marcus will get me back into the groove.

Tomorrow I will definitely start back up on the puzzles. Definitely.

judicata · **#45**

SinK wrote:

I've lost some traction over the last few days and have found it quite hard to make myself play. I'm hoping tonights teaching game with Marcus will get me back into the groove.

Tomorrow I will definitely start back up on the puzzles. Definitely.

Suggestion: if you don't feel like playing, don't play. Taking breaks is important and making yourself play when you don't want to can be counterproductive.

Marcus · **#46**

SinK wrote:

I've lost some traction over the last few days and have found it quite hard to make myself play. I'm hoping tonights teaching game with Marcus will get me back into the groove.

Tomorrow I will definitely start back up on the puzzles. Definitely.

Looks like I just missed you when I got online. Sorry about that! Work got in the way, and I ended up doing extra hours. Hopefully I'll see you online soon enough.

SinK · **#47**

Marcus wrote:

Looks like I just missed you when I got online. Sorry about that! Work got in the way, and I ended up doing extra hours. Hopefully I'll see you online soon enough.

No problem. Some other time maybe?

SinK · **#48**

First game in a while. 16/100
[sgf-full]http://files.gokgs.com/games/2010/10/21/konfucijus-S1NK.sgf[/sgf-full]

Marcus · **#49**

I'm still looking through the game, but there's one item that stands out, because it's a known corner shape, and killing it would have made thegame much closer (if not giving you the win outright). Here's the position at move 193:

Click Here To Show Diagram Code: [go]$$Wcm193 $$ +---------------------------------------+ $$ | . . . O X . X X O . . . . . . 1 . . . | $$ | . . . O X X X O . O . . . X @ . . . . | $$ | . O O . O . X O O . O O X X X @ @ @ a | $$ | . . O O X X . X X O . . O X . X X X . | $$ | O O X O O X . X O O . O . O X . . . . | $$ | X X X X O X . X X O . O . O X . . . . | $$ | . X O X X . . . O X O . O X . . . . . | $$ | O O O X . X . . . X X O O . X . . . . | $$ | . . O X . . . . . . . X . . . . . . . | $$ | . . O O X X X . . , . X . X . , X . . | $$ | . O . O O O O X X X X O O X . X . . . | $$ | . . X X O . . O X . O . O O . O X . . | $$ | . X . . . O . O X X X O . . . O X X . | $$ | . O X X X O . O X O O O O . . O O O X | $$ | . O X . O . O X . X X O . X X . . O . | $$ | . . O X X O O O X X X O . O . X X O . | $$ | . . O X . O X X . . . X O O . O X . . | $$ | O . O X . X . . . . . X O . . O O . . | $$ | . O X X . . . . . . . X X O . . . . . | $$ +---------------------------------------+[/go]

The shape that White has just made (marked with :w93:

and

stones) is called the J group, and it can be killed by making a move at a. You even start the kill correctly, but you don't know the sequence. Here's one variation:

Click Here To Show Diagram Code: [go]$$Bcm $$ +---------------------------------------+ $$ | . . . O X . X X O . . . . 5 a @ 6 3 . | $$ | . . . O X X X O . O . . . X @ 7 . 4 2 | $$ | . O O . O . X O O . O O X X X @ @ @ 1 | $$ | . . O O X X . X X O . . O X . X X X . | $$ | O O X O O X . X O O . O . O X . . . . | $$ | X X X X O X . X X O . O . O X . . . . | $$ | . X O X X . . . O X O . O X . . . . . | $$ | O O O X . X . . . X X O O . X . . . . | $$ | . . O X . . . . . . . X . . . . . . . | $$ | . . O O X X X . . , . X . X . , X . . | $$ | . O . O O O O X X X X O O X . X . . . | $$ | . . X X O . . O X . O . O O . O X . . | $$ | . X . . . O . O X X X O . . . O X X . | $$ | . O X X X O . O X O O O O . . O O O X | $$ | . O X . O . O X . X X O . X X . . O . | $$ | . . O X X O O O X X X O . O . X X O . | $$ | . . O X . O X X . . . X O O . O X . . | $$ | O . O X . X . . . . . X O . . O O . . | $$ | . O X X . . . . . . . X X O . . . . . | $$ +---------------------------------------+[/go]

Since White cannot play at a, Black can falsify one eye, killing the group.

There are a ton of variations, of course. It takes a bit of study before you're comfortable with the shape and the killing variations.

SinK · **#50**

Very angry with myself; after the approach/3-3 invasion in the north west I thought to myself, "Hah. I know this one", then promptly played on completely the wrong side rendering all you guys patient explanations of this sequence utterly moot.

Also frustrated that I missed 64 at C4.

17/100
[sgf-full]http://files.gokgs.com/games/2010/10/22/alladin45-S1NK.sgf[/sgf-full]

I checked out the first pages of GGPFB Vol 2+3 and found the first few problems of 2 I could do pretty much on sight while I had to think for quite a while to get the Vol 3 ones so I will work through both. Vol 2 for speed and insta-recognition and Vol 3 much slower for reading practice.

Chew Terr · **#51**

Trying in-sgf comments. Also, you said northwest, but meant northeast. Just a few thoughts. Overall, the game was just fine.

Stefany93 · **#52**

Good luck!

SinK · **#53**

Haven't played for a few days and felt a bit rusty despite having gained a stone in the meantime by simply sitting on my hands for a week still after this game I was still 13kyu so I feel I have officially broken that line on the graph. Go me.

I was a little bit confused about this 10k asking for 3 stones against me but I felt I held my own strategically but made some seriously foolish tactical errors that I simply shouldn't have.

I post it only as a record of my progress as I don't think the level of play on my part was of a high enough standard to make a review useful.

[sgf-full]http://files.gokgs.com/games/2010/11/1/S1NK-furuchya.sgf[/sgf-full]

Suji · **#54**

SinK wrote:

Haven't played for a few days and felt a bit rusty despite having gained a stone in the meantime by simply sitting on my hands for a week still after this game I was still 13kyu so I feel I have officially broken that line on the graph. Go me.

I was a little bit confused about this 10k asking for 3 stones against me but I felt I held my own strategically but made some seriously foolish tactical errors that I simply shouldn't have.

I post it only as a record of my progress as I don't think the level of play on my part was of a high enough standard to make a review useful.

Yeah, that's a bit backward there. You should have received 3 stones from him. Perhaps he thought that the higher the number, the stronger?

Or, he had seen you play and was very, very worried about how strong he thought you were.

For the record, I thought that you played fairly well considering the circumstances.

Chew Terr · **#55**

I know you're not really digging for a review, but I'll point out a couple of thoughts.

7: This is a really urgent time to continue locally. C10 or C11 is normal, and works well with your top left stone. If black pincers, you have to heavy stones running and are in trouble. That said, I believe that black's G4 was too far, so you can also potentially follow up later at E4 to punish. Additionally, as far as the tenuki you chose, I prefer O3, because otherwise K3 looks good for black.
17: Makes your opponent stronger. Better to leave this move for when you need support in the area, so you're not helping your opponent unless you need it.
19: F16 is simpler, and works okay with your top. Something like G17 is also tempting, but it's weird and may be bad.
33: This move can be left out, because, though black could capture a stone, it would be small and gote. Better to take D10 or something.
87: P12 seems to work.

You did fine, your groups just got a bit too separated. 87 at P12 may have been enough to keep you from getting split so harshly. Good luck, and I look forwards to seeing the next one! If you can hold your own so well while giving somebody 3 stones when you should be taking 3, your play is solid enough to be impressive!

Koroviev · **#56**

Good luck with your goals, SinK. I'm a similar level to you, but don't have anywhere near as rigorous a study programme as you do! :bow:

Looks like you'll be overtaking me soon. :grumpy:

SinK · **#57**

Koroviev wrote:

Good luck with your goals, SinK. I'm a similar level to you, but don't have anywhere near as rigorous a study programme as you do! :bow:

Looks like you'll be overtaking me soon. :grumpy:

I hope so.

Although rigorous probably isn't the word for it, I've still only done about 6 pages of puzzles total.

In other news I did drop by my university's go club last night and played a couple of games with a friend of mine. He's probably about 25kyu so it wasn't as much fun as it could have been but I have arranged to play a few better players next week though so I'm looking forward to some proper OTB action then.

SinK · **#58**

A strange game. I ended up resigning in disgust at my own play rather than the position although I am definitely not a favourite in the game by the end.

I really need to get back into the habit of reading at least one move ahead every single move to avoid silly mistakes like those below.

[sgf-full]http://files.gokgs.com/games/2010/11/7/SBJS2000-S1NK.sgf[/sgf-full]

Chew Terr · **#59**

A few suggestions:

Marcus · **#60**

I'll add a few ideas to Chew's excellent review:

[sgf-full](;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]RU[Japanese]SZ[19]KM[0.50]TM[1800]OT[5x10 byo-yomi]PW[SBJS2000]PB[S1NK]WR[12k]BR[13k]DT[2010-11-07]PC[The KGS Go Server at http://www.gokgs.com/]RE[W+Resign];B[pd]BL[1796.663];W[dq]WL[1793.175];B[pq]BL[1793.568];W[cd]WL[1789.757];B[qo]BL[1790.943];W[fc]WL[1783.976];B[co]BL[1787.742];W[gq]WL[1777.463];B[jq]BL[1778.88]C[Marcus: I'm not as worried about your C5 stone. I think this is an excellent move. White's G3 move was very passive. It's too far away from C5 to really cause you any issues, in my opinion. See variation on next move.]
(;W[mq]WL[1766.751]
(;B[lp]BL[1771.453]C[Marcus: I don't like this. The proverb says not to touch weak stones. Chew's suggestion of the one point jump to K5 is a good one, I think.];W[np]WL[1763.63];B[mp]BL[1730.949];W[no]WL[1756.782];B[nq]BL[1721.833];W[oq]WL[1747.591];B[nr]BL[1720.015];W[pp]WL[1744.122];B[or]BL[1701.779];W[oo]WL[1726.689];B[qp]BL[1695.637];W[po]WL[1719.169];B[qn]BL[1683.382];W[om]WL[1710.801]
(;B[qk]BL[1641.386]TR[pd]C[Marcus: I think this move is too local. It's too far to be a long extension from Q16, it strengthens your already-strong lower right group, and it doesn't play towards the center.

See variations.];W[kl]WL[1697.954];B[jc]BL[1619.184];W[qg]WL[1687.934];B[qe]BL[1600.305];W[qj]WL[1683.732];B[pj]BL[1595.906];W[qi]WL[1681.272];B[pk]BL[1576.481];W[oh]WL[1677.29];B[md]BL[1493.391];W[ln]WL[1658.804];B[ed]BL[1478.138];W[ec]WL[1655.8];B[dd]BL[1469.326];W[dc]WL[1652.965];B[dg]BL[1465.848];W[ci]WL[1641.165];B[ck]BL[1454.739];W[cg]WL[1634.611];B[ch]BL[1444.953];W[dh]WL[1629.39];B[bh]BL[1441.891];W[df]WL[1626.118];B[eg]BL[1439.979];W[cf]WL[1615.753];B[ef]BL[1424.383];W[ee]WL[1598.989];B[de]BL[1420.552];W[fe]WL[1595.569];B[ce]BL[1417.902];W[be]WL[1590.381];B[bf]BL[1403.917];W[fd]WL[1587.311];B[di]BL[1398.469]C[Not a bad sequence. I won't add to Chew's already detailed points here.];W[nc]WL[1558.185];B[mc]BL[1383.84];W[qc]WL[1552.305];B[pc]BL[1381.068];W[od]WL[1539.421];B[oe]BL[1376.794];W[pb]WL[1525.999];B[oc]BL[1371.23];W[ob]WL[1521.697];B[nb]BL[1366.288];W[qd]WL[1517.827];B[nd]BL[1362.927];W[rb]WL[1511.854];B[rd]BL[1353.74];W[rc]WL[1506.193];B[re]BL[1336.818];W[pf]WL[1497.263];B[pe]BL[1329.089];W[qf]WL[1478.123]
(;B[of]BL[1321.198]C[Marcus: Seems small ...];W[og]WL[1475.653];B[mf]BL[1315.429];W[mh]WL[1465.742];B[mj]BL[1274.836];W[eh]WL[1459.366];B[gg]BL[1261.621];W[fg]WL[1455.394];B[ff]BL[1258.474];W[gf]WL[1453.668];B[hr]BL[1167.458];W[gr]WL[1449.646];B[hq]BL[1156.278];W[kp]WL[1434.411];B[kq]BL[1152.716];W[ko]WL[1429.913];B[gp]BL[1145.128];W[fp]WL[1427.191];B[go]BL[1142.873];W[kj]WL[1416.725];B[li]BL[1136.446];W[lh]WL[1407.636];B[ki]BL[1131.833];W[ji]WL[1402.925];B[kh]BL[1130.001];W[kg]WL[1395.882];B[jh]BL[1128.588];W[hg]WL[1382.732];B[gh]BL[1121.167];W[hh]WL[1378.324];B[gi]BL[1117.996];W[hi]WL[1375.828];B[ii]BL[1116.466];W[jj]WL[1370.561];B[hj]BL[1104.821];W[ij]WL[1367.993];B[ih]BL[1094.739];W[gj]WL[1361.853];B[ig]BL[1088.343];W[hf]WL[1355.798];B[fi]BL[1077.719];W[ei]WL[1351.396];B[fj]BL[1062.249];W[gk]WL[1345.137];B[dj]BL[1046.492];W[ej]WL[1340.799];B[fk]BL[1042.743];W[dk]WL[1323.025];B[cj]BL[1027.343];W[fl]WL[1312.763];B[ek]BL[1014.123];W[dl]WL[1308.701]
(;B[el]BL[1009.1]C[Marcus: I'm sure you've already looked at this, but G8 first looks promising.];W[em]WL[1305.601];B[gl]BL[1006.412]C[SBJS2000 [12k\]: thanks
])
(;B[gl]
(;W[el];B[hk])
(;W[hk];B[el];W[fm];B[em])))
(;B[mj]C[Marcus: Here's that splitting attack Chew was talking about.]))
(;B[cj]C[Marcus: I'm not really sure about how good this move is, so it might not be a good idea to listen to my advice on this one.

However, it's at a critical point, restricting any extension from the shimari. C10 also makes it difficult for White to gain much from attacking the C5 stone. I'll show a few variations.

As a side note, this is probably the move I'd make on this board. I'm crazy like that.]
(;W[ch]
;B[ej]C[This, while still invadable, really breaks up the left side.])
(;W[cm];B[cg]
;W[do]TR[bd]C[Marcus: Your R13 group has a base, and gives you the later option of probing at B16. The C5 stone still has some aji, even though White has played 3 moves against it.]))
(;B[fp]C[Marcus: This is another possible continuation for you to try. Remeber, though, that the left side is going to be important.];W[fq]
(;B[dk]C[Marcus: Apparently, this is one possible continuation, but not often played at all.])
(;B[cq];W[cr];B[dp];W[eq];B[bq]
;W[cl]C[Marcus: C5 is strong, and C8 is too far from C16 to be considered an extension. Easily invadeable, if needed.]))
(;B[jd]C[Marcus: This is another big point, though the top is uninteresting, as there are fewer points to be gained.]))
(;B[jo]TR[mq]C[N3 is a weak stone for you to attack, and the G5 group is low and easily contained.]))
(;W[cm]C[Even if your opponent plays a tight pincer ...];B[fp];W[fq];B[cq];W[cr];B[dp];W[eq]
;B[bq]C[Something like this keeps C5 fairly strong.]))[/sgf-full]

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