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Approaching Enclosures http://www.lifein19x19.com/viewtopic.php?f=11&t=12063 |
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Author: | Joelnelsonb [ Sat Jul 18, 2015 4:46 pm ] |
Post subject: | Approaching Enclosures |
I'm thinking more locally here so pretend that each corner comes from a separate board position (yes, I realize that the overall board position matters a lot). I've been educated that these enclosures are all big moves but how would white go about approaching/reducing so that the black positions remain as small as possible? |
Author: | DrStraw [ Sat Jul 18, 2015 5:13 pm ] |
Post subject: | Re: Approaching Enclosures |
The two on the left would probably not be reduced on a local level. They would only be approached as part of a global strategy. Even locally the choice in all four corners depends on the global position. I have marked some of the possible points with a. That marked b are also possible in special situations. You will need to look up the sequences in SL. This list is not exhaustive, but understand these before looking elsewhere. |
Author: | ez4u [ Sat Jul 18, 2015 7:30 pm ] |
Post subject: | Re: Approaching Enclosures |
Joelnelsonb wrote: I'm thinking more locally here so pretend that each corner comes from a separate board position (yes, I realize that the overall board position matters a lot). I've been educated that these enclosures are all big moves but how would white go about approaching/reducing so that the black positions remain as small as possible? If we want to know about the situation without local stones, let's exclude them. Using kombilo on the 90,000 games in my database, the top ten choices by White faced with an otherwise open quadrant and a... Small-knight enclosure from 3-4 point Statistics: 16311 matches Wa: 6262 (Note the meaning of this is that out of 16,311 occurrences of this position, the next play in the region of the board shown was a White play at 'a' 6,262 times) Wb: 3730 Wc: 1133 Wd: 697 We: 550 Wf: 442 Wg: 400 Wh: 342 Wi: 293 Wj: 264 High enclosure from 3-4 point Statistics: 5002 matches Wa: 1553 Wb: 787 Wc: 466 Wd: 448 We: 440 Wf: 237 Wg: 222 Wh: 108 Wi: 93 Wj: 93 Large-knight enclosure from 3-4 point Statistics: 3473 matches Wa: 1518 Wb: 585 Wc: 360 Wd: 256 We: 130 Wf: 100 Wg: 57 Wh: 50 Wi: 39 Wj: 38 Small-knight enclosure from 4-4 point Statistics: 3003 matches Wa: 1169 Wb: 454 Wc: 125 Wd: 119 We: 116 Wf: 103 Wg: 100 Wh: 91 Wi: 82 Wj: 79 Do we see a pattern here? ![]() In addition, these are the results when White plays next. In all cases White plays next more often than Black. However, in all four cases Black sooner or later plays next more often than White plays 'a' (the most frequent White response). Indeed, in all cases the most frequent immediate play is tenuki. |
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