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| OCA's log http://www.lifein19x19.com/viewtopic.php?f=48&t=10474 |
Page 8 of 20 |
| Author: | Marcus [ Thu Aug 21, 2014 7:45 am ] |
| Post subject: | Re: OCA's log |
Knotwilg wrote: I think you have a misread in your second "shortage of liberties" diagram. Black can still play: |
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| Author: | Knotwilg [ Thu Aug 21, 2014 9:38 am ] |
| Post subject: | Re: OCA's log |
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| Author: | oca [ Mon Aug 25, 2014 1:26 am ] |
| Post subject: | Re: OCA's log |
Knotwilg wrote: ... Black 223 what could he have done instead? So, White 222, what could you have done instead? Hi Knotwilg, Thx for your comments, this is where I finally got to : |
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| Author: | Knotwilg [ Mon Aug 25, 2014 1:40 am ] |
| Post subject: | Re: OCA's log |
Great analysis! |
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| Author: | oca [ Thu Aug 28, 2014 3:26 am ] | ||
| Post subject: | Re: OCA's log | ||
Overall I start to win more often than I lose. I was on a nice 8 wins in a row when this game bring me back to reality... I'm not sure at which point did that game turned so bad for me... Any comment welcome. I commented a bit to nearly move 50.
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| Author: | Uberdude [ Thu Aug 28, 2014 4:04 am ] |
| Post subject: | Re: OCA's log |
s7 hane is a mistake, but that doesn't mean you should necessarily cut at r7 immediately (though I think it's probably ok). q2 to live first would be simple. Then you could cut, or just play a big move somewhere: if black takes gote to fix the cut you just tenuki again as black is being slow (Imagine he extended and you did q2 normal joseki, then end in sente to play a big move like top left corner knight's move, then black s7 turn now would be obviously slow and too early endgame move and you could play top left kosumi to complete the corner). p7 atari was good, actually better than double atari as it threatens q5 to capture the r5/6 stones which are the important cutting stones. q7 is not an important stone, capturing that was slow. Better to q2 to make the corner live. Can you see a better move for black 31? Hint: viewtopic.php?p=171661#p171661 . c9 must be c7 cut, this uses c5 and you will get an ok result. The game was ok for you until c5 died on a big scale. |
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| Author: | Marcus [ Thu Aug 28, 2014 4:33 am ] |
| Post subject: | Re: OCA's log |
I like leaving the aji from the s7 mistake for later, as it's often possible to reduce your opponent's territory later with the clamp at s8. Continuing at q2 and being patient can provide you with more options, depending on how your opponent plays. If Black finishes the joseki as normal, you can clamp (now or later) at s8: If Black decides that he needs to protect the r7 cut instead of finishing the joseki, you have another clamp you can use: Hope that gives you a few more ideas. 
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| Author: | Knotwilg [ Thu Aug 28, 2014 4:37 am ] |
| Post subject: | Re: OCA's log |
 is worthy of the "end of comments" remark, as the sequence starting at  went wrong for White and put Black in the lead. By :w118: the game is effecively over at our level.The basic technique for  is to crosscut. White has the advantage of supporting stones. What follows is often a atari-connect sequence in which White gets the central influence and Black some side territory. Instead you block and let Black cut off your stone easily.Then  suddenly remembers the lone stone and tries to save it, at the expense of a ponnuki for Black.Next decides to forget about the lone stone after all and strenghten the stones that are left.This result is far inferior to the technique I referred to, where you get the upper hand in the local fight. Other than that I second Uberdude's comments that the opening was well played. Myself I would always cut the premature hane, except if the central black influence would be overwhelming. EDIT: looking back at this position, I'd cut at q5 with 
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| Author: | oca [ Thu Aug 28, 2014 11:43 am ] |
| Post subject: | Re: OCA's log |
Thank you all !!! your so helpfull  Uberdude wrote: Can you see a better move for black 31? Hint: viewtopic.php?p=171661#p171661 . My best try is this one, where I didn't find any sequence to live for white playing  at either "a" or "b"but I'm still not 100% sure what happend in that case... I think I can live as white... |
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| Author: | Uberdude [ Thu Aug 28, 2014 11:58 am ] |
| Post subject: | Re: OCA's log |
33 is better at t6 then r1 hane. Remember the proverb "there is death in the hane": first try hanes from the outside to reduce the eyespace and then inside placements and then only if they don't work read inside moves first. How do you kill this one (Seems like sente seki to me)? Or at b looks like a ko. 32 here is a nice idea, but how do you live after (or perhaps how do you kill, I find black's killing move harder to find than white's attempts to live): |
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| Author: | oca [ Sun Aug 31, 2014 2:08 am ] | ||
| Post subject: | Re: OCA's log | ||
thx for your comment Uberdude, I think I made a lot of mistake in my reading... these L and L+1 are style very difficult for me  In the mean time I also played a new game, 3 stones handicap, that went also really bad for me. but at the really end, when removing the dead stones, my opponent resigned  ... weird... he would have won by something like 30 points or so....here is the game... with a few comments of mine. Any comments welcome.
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| Author: | Charles Matthews [ Sun Aug 31, 2014 2:57 am ] |
| Post subject: | Re: OCA's log |
oca wrote: In the mean time I also played a new game, 3 stones handicap, that went also really bad for me. All-out fighting.  Must be Q6, no choice. Can try Q3 to make White over-concentrated, and settle your stone. You can try S5 to fight. Otherwise the result will be poor. Must be double hane at G2 to make sense of your way of playing. Not a good idea. Interesting. But this doesn't work ... ...because the other atari is better than this one, given the cutting point at E3. Spot the shunt. Should probably just be N8, though Black also has to worry about getting cut. As it is, Black's shape falls apart.
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| Author: | oca [ Tue Sep 02, 2014 11:39 pm ] | ||
| Post subject: | Re: OCA's log | ||
Thank you very much Charles ! at Q6 was my first instinct, I should listen to him somethimes, too much thinking is not always good...Here is a game I'm happy with. it's a 9 stones handicap, where I tried to not focus to much on territory. the game went fine for me despite I think I missed a nice killing move at 138 and certainly a lot of other things... So here is the game
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| Author: | S2W [ Wed Sep 03, 2014 4:32 am ] |
| Post subject: | Re: OCA's log |
Some ideas about the variation on move 48: But it's late so take them with a grain of salt. |
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| Author: | oca [ Wed Sep 03, 2014 10:35 am ] |
| Post subject: | Re: OCA's log |
Thx for your variations S2W, really a lot of possibilities... (to die...  )
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| Author: | oca [ Thu Sep 04, 2014 3:42 am ] | ||
| Post subject: | Re: OCA's log | ||
Hi, Here is a game where I did a 3-3 invasion on a hoshi stone. This situation arrived again (see moves 31 - 42), where black plays this hane at  which should be at "a"I liked marcus idea of clamp (viewtopic.php?p=172237#p172237) but here that  is bit annoying ...I still tried these clamps during the game and that was somehow was ok... but I'm curious what you would have done in that situation. Here is the game
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| Author: | S2W [ Thu Sep 04, 2014 7:16 am ] |
| Post subject: | Re: OCA's log |
I think the move above protects against the clamp on the right, but leaves a big endgame reduction at A5 - see in the variations below at move 40 |
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| Author: | Uberdude [ Thu Sep 04, 2014 7:29 am ] |
| Post subject: | Re: OCA's log |
p7 = ???!!! |
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| Author: | skydyr [ Thu Sep 04, 2014 7:32 am ] | ||
| Post subject: | Re: OCA's log | ||
It's slightly more reasonable with the supporting stones, but here are a few ideas:
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| Author: | Uberdude [ Thu Sep 04, 2014 8:08 am ] |
| Post subject: | Re: OCA's log |
Move 43 should be r16 (or maybe something more adventurous like q17), it's absolutely massive to connect your stones there. Your 3-3 lived in sente. A fine result already. Those cuts or clamps are some bad aji of black's that you may exploit later. Other areas of the board are far more important now. |
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