Becoming 9 kyu - Lesson 20

Move 12

Black[2d]

0 captures

White[2d]

0 captures

+ 6.5

Unranked

Rules: Japanese

Review by: ...

Move 0 + 14

August 10, 2019

[15:10] TaBellaria[7k]: hi

[15:14] h223[1d]: Hi

[15:15] 0nironauta[4k]: playing bottom-left corner?

[15:15] kickaha[4d]: hey.

[15:16] Mitsunari[1d]: s16?

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[15:16] derekwisher5[11k]: is there sound to this?

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[15:17] mark5000[7d]: Text only.

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[15:17] derekwisher5[11k]: thanks

[15:17] derekwisher5[11k]: so you waiting for someone to supply the right answer?

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[15:17] h223[1d]: I think s16 too

[15:17] mark5000[7d]: Assume the other corners are taken and tenuki isn't good now. What local play keeps sente?

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[15:19] TaBellaria[7k]: s16 s14 p14 r13

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[15:19] TomaLexi[2k]: that literally jappened to me today

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[15:19] TaBellaria[7k]: is bad

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[15:19] derekwisher5[11k]: So S14?

[15:19] TomaLexi[2k]: when reading goes wrong.

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[15:20] Maro98[4k]: is p15 proper?

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[15:20] derekwisher5[11k]: but... haha

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[15:20] derekwisher5[11k]: no you lose sente and bad shape?

[15:20] Mitsunari[1d]: not sente

[15:20] TomaLexi[2k]: and W counterattacks

[15:20] TomaLexi[2k]: yea

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[15:21] Cement[6k]: isn't that still gote?

[15:21] derekwisher5[11k]: do you keep sente?

[15:21] kickaha[4d]: threatens s16

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[15:22] tpnZbonek[5k]: isnt it kind slow to capture those two stones now?

[15:23] TomaLexi[2k]: yes it is

[15:23] TaBellaria[7k]: eventually white will have to come back and defend

[15:23] TomaLexi[2k]: at this stage? not really

[15:24] mark5000[7d]: Actually, s16 is quite big, even in the opening. Remember: corners are the most efficient and most valuable areas.

[15:24] Cement[6k]: those two stones are +/- ~12 points

[15:24] Cement[6k]: for white

[15:24] mark5000[7d]: Thanks for the calc.

[15:25] mark5000[7d]: So that move rivals other opening moves. And we can assume other corners are somewhat developed, since taisha only shows up after move 5 or so.

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[15:26] mark5000[7d]: I'll show you another example.

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[15:28] TaBellaria[7k]: T18?

[15:29] tpnZbonek[5k]: still gote

[15:29] tpnZbonek[5k]: ah

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[15:29] TomaLexi[2k]: yeah, Wplays at S19 I think and then throw in if B doesnt react

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[15:30] clackie[6k]: doesn't that make it a' sente?

[15:30] TomaLexi[2k]: What if W plays S19 instead of tenuki?

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[15:31] TaBellaria[7k]: R18?

[15:33] tpnZbonek[5k]: P17?

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[15:33] TomaLexi[2k]: oh neat

[15:33] Shekomaru[6k]: Black can tenuki now

[15:33] Cement[6k]: now T19 doesn't work

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[15:35] TomaLexi[2k]: ko?

[15:37] mark5000[7d]: So yes, ko is the answer.

[15:38] roentgenium[5k]: I think the subject of Ko would be an idea for a future lecture :)

[15:38] mark5000[7d]: Will consider it!

[15:38] mark5000[7d]: The point of today's lesson is to show you how to fight for sente.

[15:38] TomaLexi[2k]: yeah its interesting

[15:38] TomaLexi[2k]: the last example is above 9k level i think

[15:38] mark5000[7d]: If you do not know about fighting for sente, you will miss the subtext of many games.

[15:38] Cement[6k]: also black can get sente later maybe and defend himself against ko

[15:38] TomaLexi[2k]: i will need to show that in our local go club :)

[15:39] mark5000[7d]: That concludes today's lecture. Any questions?

[15:39] clackie[6k]: ko's are always bad for me, I don't think I've ever had enough ko threats in my life ever

[15:39] derekwisher5[11k]: Thank you!

[15:39] Shekomaru[6k]: Thanks a lot Mark :)

[15:39] Cement[6k]: are there common things to look for midgame that might indicate that you can get sente?

[15:40] cascina-goban[?]: ty!

[15:41] mark5000[7d]: Yes, there are signs you can get sente. Those signs are visible through reading. We looked at one example today, that forcing moves aren't always good.

[15:41] mark5000[7d]: If you read a short sequence that ends in gote, try omitting one of the moves along the way and see if it works better.

[15:42] mark5000[7d]: You might stumble upon a sente sequence.

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[15:43] Cement[6k]: I see

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[15:43] Cement[6k]: perhaps "when to use forcing moves" is also a good lecture topic too, assuming it hasn't been done already

[15:44] mark5000[7d]: Indeed

[15:44] mark5000[7d]: There's so many topics in Go. This is my 20th lecture and I still get suggestions all the time.

[15:45] mark5000[7d]: See lectures 1-19 here: becoming 9-kyu-a-series-for-beginners

[15:45] tpnZbonek[5k]: mark.. i watched for your study session group

[15:45] tpnZbonek[5k]: you post some positions there.. what is the point? find the best move in the board?

[15:46] mark5000[7d]: Yes

[15:46] tpnZbonek[5k]: ah.. ok

[15:46] mark5000[7d]: To find the move the pro played, or that another strong player might play, and to sharpen your reading skill.

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[15:49] roentgenium[5k]: Thanks for taking the time to do these lectures

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[15:49] mark5000[7d]: You're welcome.

[15:50] mark5000[7d]: See you next Saturday about the same time. :)

[16:47] trohde[3k]: Thanks, @mark5000!