It is currently Thu Mar 28, 2024 4:48 am

All times are UTC - 8 hours [ DST ]




Post new topic Reply to topic  [ 25 posts ]  Go to page 1, 2  Next
Author Message
Offline
 Post subject: L19 Go Problem Championship: Round 4
Post #1 Posted: Thu Mar 09, 2017 11:57 pm 
Honinbo

Posts: 9545
Liked others: 1600
Was liked: 1711
KGS: Kirby
Tygem: 커비라고해
Welcome to Round 4 of the L19 Go Problem Championship.

All problems are black to play. As usual, provide your solutions either via hide tags, or direct private message to me.

Problem 1 (3 points)
Click Here To Show Diagram Code
[go]$$B
$$ ------------------
$$ . . . . . X . . . |
$$ . . . O X . X O . |
$$ . . O . O X X . . |
$$ . . . O O , O O . |
$$ . . . . . O . . . |
$$ . . . . . . . . . |[/go]




Problem 2 (6 points)
Click Here To Show Diagram Code
[go]$$B
$$ ------------------
$$ . . . X . . . . . |
$$ . . . X O . . . . |
$$ . . . X O X O O . |
$$ . . X . O O X O X |
$$ . . . X X X X X . |
$$ . . . . . . . . . |[/go]





Problem 3 (9 points)
Click Here To Show Diagram Code
[go]$$B
$$ | . . . . . . . . . .
$$ | . . . . X X X X . .
$$ | . . X X O O O X . .
$$ | . X . , O . O X . ,
$$ | . X O . O . . X . .
$$ | . X O . . . . . X .
$$ | . . . . O . . . X .
$$ ---------------------[/go]



Have fun! :salute:

_________________
be immersed

Top
 Profile  
 
Offline
 Post subject:
Post #2 Posted: Fri Mar 10, 2017 2:50 am 
Honinbo
User avatar

Posts: 8859
Location: Santa Barbara, CA
Liked others: 349
Was liked: 2076
GD Posts: 312
2017 Round 4.1 (010)
Click Here To Show Diagram Code
[go]$$B
$$ -------------------
$$ . . . . . X . . . |
$$ . . . O X . X O . |
$$ . . O . O X X . . |
$$ . . . O O , O O . |
$$ . . . . . O . . . |
$$ . . . . . . . . . |[/go]
At first I thought it was W to play. :)
Click Here To Show Diagram Code
[go]$$W
$$ ------------------
$$ . . . . . X . . . |
$$ . . . O X . X O . |
$$ . . O . O X X 1 . |
$$ . . . O O , O O . |
$$ . . . . . O . . . |
$$ . . . . . . . . . |[/go]
Click Here To Show Diagram Code
[go]$$B B dies
$$ -------------------
$$ . . . . . X 5 . 4 |
$$ . . . O X . X O 3 |
$$ . . O . O X X 1 2 |
$$ . . . O O , O O 6 |
$$ . . . . . O . . . |
$$ . . . . . . . . . |[/go]
Click Here To Show Diagram Code
[go]$$B ko
$$ -------------------
$$ . . . . . X . 5 4 |
$$ . . . O X . X O 3 |
$$ . . O . O X X 1 2 |
$$ . . . O O , O O . |
$$ . . . . . O . . . |
$$ . . . . . . . . . |[/go]
2017 Round 4.2 (011)
Click Here To Show Diagram Code
[go]$$B
$$ --------------------
$$ . . . X . . . . . |
$$ . . . X O . . . . |
$$ . . . X O X O O . |
$$ . . X . O O X O X |
$$ . . . X X X X X . |
$$ . . . . . . . . . |[/go]
Click Here To Show Diagram Code
[go]$$B :w2: @ (a) or (b) ; W dies
$$ --------------------
$$ . . . X . . . . . |
$$ . . . X O a b 1 . |
$$ . . . X O X O O 3 |
$$ . . X . O O X O X |
$$ . . . X X X X X . |
$$ . . . . . . . . . |[/go]
Click Here To Show Diagram Code
[go]$$B :w2: in 1st line grey area ; squeeze
$$ --------------------
$$ . . . X ? ? ? ? ? |
$$ . . . X O . 3 1 . |
$$ . . . X O X O O ? |
$$ . . X . O O X O X |
$$ . . . X X X X X . |
$$ . . . . . . . . . |[/go]
:study:
Click Here To Show Diagram Code
[go]$$B
$$ --------------------
$$ . . . X . . . . . |
$$ . . . X O . . 1 2 |
$$ . . . X O X O O . |
$$ . . X . O O X O X |
$$ . . . X X X X X . |
$$ . . . . . . . . . |[/go]

Click Here To Show Diagram Code
[go]$$B B kills only half, in sente ; hmm...
$$ --------------------
$$ . . . X . 5 . 6 . |
$$ . . . X O 3 4 1 2 |
$$ . . . X O X O O . |
$$ . . X . O O X O X |
$$ . . . X X X X X . |
$$ . . . . . . . . . |[/go]

Click Here To Show Diagram Code
[go]$$B
$$ --------------------
$$ . . . X . . . . . |
$$ . . . X O 4 3 1 2 |
$$ . . . X O X O O . |
$$ . . X . O O X O X |
$$ . . . X X X X X . |
$$ . . . . . . . . . |[/go]
:study:
Click Here To Show Diagram Code
[go]$$B W lives
$$ --------------------
$$ . . . X . 6 . 5 . |
$$ . . . X O O X X O |
$$ . . . X O . O O . |
$$ . . X . O O X O X |
$$ . . . X X X X X . |
$$ . . . . . . . . . |[/go]
:study:
Click Here To Show Diagram Code
[go]$$B
$$ --------------------
$$ . . . X . . . . . |
$$ . . . X O . . . 1 |
$$ . . . X O X O O . |
$$ . . X . O O X O X |
$$ . . . X X X X X . |
$$ . . . . . . . . . |[/go]
2017 Round 4.3 (012)
Click Here To Show Diagram Code
[go]$$B
$$ | . . . . . . . . . .
$$ | . . . . X X X X . .
$$ | . . X X O O O X . .
$$ | . X . , O . O X . ,
$$ | . X O . O . . X . .
$$ | . X O . . . . . X .
$$ | . . . . O . . . X .
$$ ---------------------[/go]
:study:
Click Here To Show Diagram Code
[go]$$B W lives...
$$ | . . . . . . . . . .
$$ | . . . . X X X X . .
$$ | . . X X O O O X . .
$$ | . X . , O . O X . ,
$$ | . X O . O 2 . X . .
$$ | . X O . . 1 . . X .
$$ | . . . . O . . . X .
$$ ---------------------[/go]
:study:
Click Here To Show Diagram Code
[go]$$B
$$ | . . . . . . . . . .
$$ | . . . . X X X X . .
$$ | . . X X O O O X . .
$$ | . X . , O . O X . ,
$$ | . X O . O 1 2 X . .
$$ | . X O 0 8 3 4 . X .
$$ | . . 9 7 O 6 5 . X .
$$ ---------------------[/go]

Click Here To Show Diagram Code
[go]$$Bm11
$$ | . . . . . . . . . .
$$ | . . . . X X X X . .
$$ | . . X X O O O X . .
$$ | . X . 1 O . O X . ,
$$ | . X O . O X O X . .
$$ | . X O O O X O . X .
$$ | . 2 X X O O X . X .
$$ ---------------------[/go]
:study:
Click Here To Show Diagram Code
[go]$$Bm13 :b2: W dies...
$$ | . . . . . . . . . .
$$ | . . . . X X X X . .
$$ | . . X X O O O X . .
$$ | . X . X O . O X . ,
$$ | . X O . O X O X . .
$$ | . X O O O X O . X .
$$ | . O 1 . O O X . X .
$$ ---------------------[/go]

Top
 Profile  
 
Offline
 Post subject: Re: L19 Go Problem Championship: Round 4
Post #3 Posted: Sat Mar 11, 2017 4:39 pm 
Lives with ko

Posts: 149
Liked others: 276
Was liked: 49
Rank: 3d
KGS: 3d
DGS: 3d
OGS: 3d
1. Ko
Click Here To Show Diagram Code
[go]$$B
$$ ------------------
$$ . . . . . X . 5 4 |
$$ . . . O X . X O 3 |
$$ . . O . O X X 1 2 |
$$ . . . O O , O O . |
$$ . . . . . O . . . |
$$ . . . . . . . . . |[/go]


2.
Click Here To Show Diagram Code
[go]$$B
$$ ------------------
$$ . . . X . 2 . 4 . |
$$ . . . X O 1 . . 3 |
$$ . . . X O X O O 5 |
$$ . . X . O O X O X |
$$ . . . X X X X X . |
$$ . . . . . . . . . |[/go]


Variation:
Click Here To Show Diagram Code
[go]$$B
$$ ------------------
$$ . . . X . 2 . . . |
$$ . . . X O 1 5 . 3 |
$$ . . . X O X O O 4 |
$$ . . X . O O X O X |
$$ . . . X X X X X . |
$$ . . . . . . . . . |[/go]


Variation:
Click Here To Show Diagram Code
[go]$$B
$$ ------------------
$$ . . . X 5 3 4 . . |
$$ . . . X O 1 2 . . |
$$ . . . X O X O O . |
$$ . . X . O O X O X |
$$ . . . X X X X X . |
$$ . . . . . . . . . |[/go]


Variation:
Click Here To Show Diagram Code
[go]$$B
$$ ------------------
$$ . . . X . 4 . 2 . |
$$ . . . X O 1 . . 3 |
$$ . . . X O X O O 5 |
$$ . . X . O O X O X |
$$ . . . X X X X X . |
$$ . . . . . . . . . |[/go]


Variation: B fails
Click Here To Show Diagram Code
[go]$$B
$$ ------------------
$$ . . . X 1 2 3 . . |
$$ . . . X O 4 . 5 . |
$$ . . . X O X O O 6 |
$$ . . X . O O X O X |
$$ . . . X X X X X . |
$$ . . . . . . . . . |[/go]


3.

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


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


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


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


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


Seki, B5 fails
Click Here To Show Diagram Code
[go]$$B
$$ | . . . . . . . . . .
$$ | . . . . X X X X . .
$$ | . . X X O O O X . .
$$ | . X . 9 O . O X . ,
$$ | . X O a O 1 2 X . .
$$ | . X O . b 3 4 . X .
$$ | . c 7 8 O 5 6 . X .
$$ ---------------------[/go]


B5 fails
Click Here To Show Diagram Code
[go]$$B
$$ | . . . . . . . . . .
$$ | . . . . X X X X . .
$$ | . . X X O O O X . .
$$ | . X . 7 O . O X . ,
$$ | . X O 8 O 1 2 X . .
$$ | . X O . . 3 4 . X .
$$ | . . 5 6 O . . . X .
$$ ---------------------[/go]


B5 fails
Click Here To Show Diagram Code
[go]$$B
$$ | . . . . . . . . . .
$$ | . . . . X X X X . .
$$ | . . X X O O O X . .
$$ | . X . . O . O X . ,
$$ | . X O . O 1 2 X . .
$$ | . X O . . 3 4 . X .
$$ | . . 8 7 O 5 6 . X .
$$ ---------------------[/go]


After B5, W8 fails

Click Here To Show Diagram Code
[go]$$B
$$ | . . . . . . . . . .
$$ | . . . . X X X X . .
$$ | . . X X O O O X . .
$$ | . X . b O . O X . ,
$$ | . X O . O 1 2 X . .
$$ | . X O a 8 3 4 . X .
$$ | . . 9 7 O 6 5 . X .
$$ ---------------------[/go]


However, W8 has strong resistance:
Click Here To Show Diagram Code
[go]$$B
$$ | . . . . . . . . . .
$$ | . . . . X X X X . .
$$ | . . X X O O O X . .
$$ | . X . , O . O X . ,
$$ | . X O . O 1 2 X . .
$$ | . X O . . 3 4 . X .
$$ | . . . 7 O 6 5 8 X .
$$ ---------------------[/go]


(Cont'd) B fails
Click Here To Show Diagram Code
[go]$$B
$$ | . . . . . . . . . .
$$ | . . . . X X X X . .
$$ | . . X X O O O X . .
$$ | . X . , O . O X . ,
$$ | . X O . O X O X . .
$$ | . X O . 1 X O . X .
$$ | . . 2 X O O . O X .
$$ ---------------------[/go]


(Cont'd) W has a and b miai, B fails
Click Here To Show Diagram Code
[go]$$B
$$ | . . . . . . . . . .
$$ | . . . . X X X X . .
$$ | . . X X O O O X . .
$$ | . X . a O . O X . ,
$$ | . X O . O X O X . .
$$ | . X O 2 . X O b X .
$$ | . . 1 X O O . O X .
$$ ---------------------[/go]


B1 fails
Click Here To Show Diagram Code
[go]$$B
$$ | . . . . . . . . . .
$$ | . . . . X X X X . .
$$ | . . X X O O O X . .
$$ | . X . . O . O X . ,
$$ | . X O 6 O 2 . X . .
$$ | . X O 5 3 1 4 . X .
$$ | . . . . O . . . X .
$$ ---------------------[/go]



B1 fails
Click Here To Show Diagram Code
[go]$$B
$$ | . . . . . . . . . .
$$ | . . . . X X X X . .
$$ | . . X X O O O X . .
$$ | . X . , O . O X . ,
$$ | . X O . O 2 . X . .
$$ | . X O . 4 1 3 . X .
$$ | . . . . O . . . X .
$$ ---------------------[/go]


B1 fails
Click Here To Show Diagram Code
[go]$$B
$$ | . . . . . . . . . .
$$ | . . . . X X X X . .
$$ | . . X X O O O X . .
$$ | . X . . O . O X . ,
$$ | . X O . O . . X . .
$$ | . X O 1 2 . . . X .
$$ | . . . . O . . . X .
$$ ---------------------[/go]



B1 fails
Click Here To Show Diagram Code
[go]$$B
$$ | . . . . . . . . . .
$$ | . . . . X X X X . .
$$ | . . X X O O O X . .
$$ | . X . 1 O . O X . ,
$$ | . X O 3 O 2 . X . .
$$ | . X O 4 . . . . X .
$$ | . . . . O . . . X .
$$ ---------------------[/go]

Top
 Profile  
 
Offline
 Post subject: Re: L19 Go Problem Championship: Round 4
Post #4 Posted: Sat Mar 11, 2017 5:52 pm 
Tengen

Posts: 4380
Location: North Carolina
Liked others: 499
Was liked: 733
Rank: AGA 3k
GD Posts: 65
OGS: Hyperpape 4k
Click Here To Show Diagram Code
[go]$$B
$$ ------------------
$$ . . . . . X . 5 4 |
$$ . . . O X . X O 3 |
$$ . . O . O X X 1 2 |
$$ . . . O O , O O . |
$$ . . . . . O . . . |
$$ . . . . . . . . . |[/go]

Ko.

Well, here's a move that doesn't work!

Click Here To Show Diagram Code
[go]$$B
$$ ------------------
$$ . . . X 7 6 . 5 . |
$$ . . . X O 2 1 3 4 |
$$ . . . X O X O O . |
$$ . . X . O O X O X |
$$ . . . X X X X X . |
$$ . . . . . . . . . |[/go]


Click Here To Show Diagram Code
[go]$$B
$$ ------------------
$$ . . . X . 7 6 5 . |
$$ . . . X O 2 1 3 4 |
$$ . . . X O X O O . |
$$ . . X . O O X O X |
$$ . . . X X X X X . |
$$ . . . . . . . . . |[/go]


Click Here To Show Diagram Code
[go]$$B
$$ ------------------
$$ . . . X . . 3 . . |
$$ . . . X O 4 1 2 . |
$$ . . . X O X O O . |
$$ . . X . O O X O X |
$$ . . . X X X X X . |
$$ . . . . . . . . . |[/go]


I think this works.
Click Here To Show Diagram Code
[go]$$B
$$ ------------------
$$ . . . X . 5 . . . |
$$ . . . X O 3 4 1 . |
$$ . . . X O X O O 2 |
$$ . . X . O O X O X |
$$ . . . X X X X X . |
$$ . . . . . . . . . |[/go]


Click Here To Show Diagram Code
[go]$$B
$$ ------------------
$$ . . . X 6 . 7 . 5 |
$$ . . . X O 2 . 1 4 |
$$ . . . X O X O O 3 |
$$ . . X . O O X O X |
$$ . . . X X X X X . |
$$ . . . . . . . . . |[/go]

_________________
Occupy Babel!

Top
 Profile  
 
Offline
 Post subject: Re: L19 Go Problem Championship: Round 4
Post #5 Posted: Tue Mar 14, 2017 5:14 pm 
Lives in sente
User avatar

Posts: 1206
Liked others: 51
Was liked: 192
Rank: KGS 5d
KGS: Str1fe, Midorisuke
Problem 1 (3 points)
Click Here To Show Diagram Code
[go]$$B
$$ ------------------
$$ . . . . . X . 5 4 |
$$ . . . O X . X O 3 |
$$ . . O . O X X 1 2 |
$$ . . . O O , O O . |
$$ . . . . . O . . . |
$$ . . . . . . . . . |[/go]




Problem 2 (6 points)
Click Here To Show Diagram Code
[go]$$B
$$ ------------------
$$ . . . X . 4 . . . |
$$ . . . X O 3 . 2 1 |
$$ . . . X O X O O 5 |
$$ . . X . O O X O X |
$$ . . . X X X X X . |
$$ . . . . . . . . . |[/go]





Problem 3 (9 points)
Click Here To Show Diagram Code
[go]$$B
$$ | . . . . . . . . . .
$$ | . . . . X X X X . .
$$ | . . X X O O O X . .
$$ | . X . , O . O X . ,
$$ | . X O . O 1 2 X . .
$$ | . X O . . 3 4 . X .
$$ | . . . 5 O . . . X .
$$ ---------------------[/go]

Top
 Profile  
 
Offline
 Post subject: Re: L19 Go Problem Championship: Round 4
Post #6 Posted: Tue Mar 14, 2017 10:08 pm 
Honinbo

Posts: 9545
Liked others: 1600
Was liked: 1711
KGS: Kirby
Tygem: 커비라고해
@EdLee:
Quote:
Looks like you are still studying for the last two problems. Did you want any comments?

I don't always check the edits, so let me know if you make an update and want feedback before Friday.

_________________
be immersed

Top
 Profile  
 
Offline
 Post subject: Re: L19 Go Problem Championship: Round 4
Post #7 Posted: Tue Mar 14, 2017 10:08 pm 
Honinbo

Posts: 9545
Liked others: 1600
Was liked: 1711
KGS: Kirby
Tygem: 커비라고해
gamesorry wrote:
1. Ko
Click Here To Show Diagram Code
[go]$$B
$$ ------------------
$$ . . . . . X . 5 4 |
$$ . . . O X . X O 3 |
$$ . . O . O X X 1 2 |
$$ . . . O O , O O . |
$$ . . . . . O . . . |
$$ . . . . . . . . . |[/go]


2.
Click Here To Show Diagram Code
[go]$$B
$$ ------------------
$$ . . . X . 2 . 4 . |
$$ . . . X O 1 . . 3 |
$$ . . . X O X O O 5 |
$$ . . X . O O X O X |
$$ . . . X X X X X . |
$$ . . . . . . . . . |[/go]


Variation:
Click Here To Show Diagram Code
[go]$$B
$$ ------------------
$$ . . . X . 2 . . . |
$$ . . . X O 1 5 . 3 |
$$ . . . X O X O O 4 |
$$ . . X . O O X O X |
$$ . . . X X X X X . |
$$ . . . . . . . . . |[/go]


Variation:
Click Here To Show Diagram Code
[go]$$B
$$ ------------------
$$ . . . X 5 3 4 . . |
$$ . . . X O 1 2 . . |
$$ . . . X O X O O . |
$$ . . X . O O X O X |
$$ . . . X X X X X . |
$$ . . . . . . . . . |[/go]


Variation:
Click Here To Show Diagram Code
[go]$$B
$$ ------------------
$$ . . . X . 4 . 2 . |
$$ . . . X O 1 . . 3 |
$$ . . . X O X O O 5 |
$$ . . X . O O X O X |
$$ . . . X X X X X . |
$$ . . . . . . . . . |[/go]


Variation: B fails
Click Here To Show Diagram Code
[go]$$B
$$ ------------------
$$ . . . X 1 2 3 . . |
$$ . . . X O 4 . 5 . |
$$ . . . X O X O O 6 |
$$ . . X . O O X O X |
$$ . . . X X X X X . |
$$ . . . . . . . . . |[/go]


3.

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


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


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


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


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


Seki, B5 fails
Click Here To Show Diagram Code
[go]$$B
$$ | . . . . . . . . . .
$$ | . . . . X X X X . .
$$ | . . X X O O O X . .
$$ | . X . 9 O . O X . ,
$$ | . X O a O 1 2 X . .
$$ | . X O . b 3 4 . X .
$$ | . c 7 8 O 5 6 . X .
$$ ---------------------[/go]


B5 fails
Click Here To Show Diagram Code
[go]$$B
$$ | . . . . . . . . . .
$$ | . . . . X X X X . .
$$ | . . X X O O O X . .
$$ | . X . 7 O . O X . ,
$$ | . X O 8 O 1 2 X . .
$$ | . X O . . 3 4 . X .
$$ | . . 5 6 O . . . X .
$$ ---------------------[/go]


B5 fails
Click Here To Show Diagram Code
[go]$$B
$$ | . . . . . . . . . .
$$ | . . . . X X X X . .
$$ | . . X X O O O X . .
$$ | . X . . O . O X . ,
$$ | . X O . O 1 2 X . .
$$ | . X O . . 3 4 . X .
$$ | . . 8 7 O 5 6 . X .
$$ ---------------------[/go]


After B5, W8 fails

Click Here To Show Diagram Code
[go]$$B
$$ | . . . . . . . . . .
$$ | . . . . X X X X . .
$$ | . . X X O O O X . .
$$ | . X . b O . O X . ,
$$ | . X O . O 1 2 X . .
$$ | . X O a 8 3 4 . X .
$$ | . . 9 7 O 6 5 . X .
$$ ---------------------[/go]


However, W8 has strong resistance:
Click Here To Show Diagram Code
[go]$$B
$$ | . . . . . . . . . .
$$ | . . . . X X X X . .
$$ | . . X X O O O X . .
$$ | . X . , O . O X . ,
$$ | . X O . O 1 2 X . .
$$ | . X O . . 3 4 . X .
$$ | . . . 7 O 6 5 8 X .
$$ ---------------------[/go]


(Cont'd) B fails
Click Here To Show Diagram Code
[go]$$B
$$ | . . . . . . . . . .
$$ | . . . . X X X X . .
$$ | . . X X O O O X . .
$$ | . X . , O . O X . ,
$$ | . X O . O X O X . .
$$ | . X O . 1 X O . X .
$$ | . . 2 X O O . O X .
$$ ---------------------[/go]


(Cont'd) W has a and b miai, B fails
Click Here To Show Diagram Code
[go]$$B
$$ | . . . . . . . . . .
$$ | . . . . X X X X . .
$$ | . . X X O O O X . .
$$ | . X . a O . O X . ,
$$ | . X O . O X O X . .
$$ | . X O 2 . X O b X .
$$ | . . 1 X O O . O X .
$$ ---------------------[/go]


B1 fails
Click Here To Show Diagram Code
[go]$$B
$$ | . . . . . . . . . .
$$ | . . . . X X X X . .
$$ | . . X X O O O X . .
$$ | . X . . O . O X . ,
$$ | . X O 6 O 2 . X . .
$$ | . X O 5 3 1 4 . X .
$$ | . . . . O . . . X .
$$ ---------------------[/go]



B1 fails
Click Here To Show Diagram Code
[go]$$B
$$ | . . . . . . . . . .
$$ | . . . . X X X X . .
$$ | . . X X O O O X . .
$$ | . X . , O . O X . ,
$$ | . X O . O 2 . X . .
$$ | . X O . 4 1 3 . X .
$$ | . . . . O . . . X .
$$ ---------------------[/go]


B1 fails
Click Here To Show Diagram Code
[go]$$B
$$ | . . . . . . . . . .
$$ | . . . . X X X X . .
$$ | . . X X O O O X . .
$$ | . X . . O . O X . ,
$$ | . X O . O . . X . .
$$ | . X O 1 2 . . . X .
$$ | . . . . O . . . X .
$$ ---------------------[/go]



B1 fails
Click Here To Show Diagram Code
[go]$$B
$$ | . . . . . . . . . .
$$ | . . . . X X X X . .
$$ | . . X X O O O X . .
$$ | . X . 1 O . O X . ,
$$ | . X O 3 O 2 . X . .
$$ | . X O 4 . . . . X .
$$ | . . . . O . . . X .
$$ ---------------------[/go]



@gamesorry:
Looks good. Kudos to your thorough variations!

_________________
be immersed


This post by Kirby was liked by: gamesorry
Top
 Profile  
 
Offline
 Post subject: Re: L19 Go Problem Championship: Round 4
Post #8 Posted: Tue Mar 14, 2017 10:14 pm 
Honinbo

Posts: 9545
Liked others: 1600
Was liked: 1711
KGS: Kirby
Tygem: 커비라고해
hyperpape wrote:
Click Here To Show Diagram Code
[go]$$B
$$ ------------------
$$ . . . . . X . 5 4 |
$$ . . . O X . X O 3 |
$$ . . O . O X X 1 2 |
$$ . . . O O , O O . |
$$ . . . . . O . . . |
$$ . . . . . . . . . |[/go]

Ko.

Well, here's a move that doesn't work!

Click Here To Show Diagram Code
[go]$$B
$$ ------------------
$$ . . . X 7 6 . 5 . |
$$ . . . X O 2 1 3 4 |
$$ . . . X O X O O . |
$$ . . X . O O X O X |
$$ . . . X X X X X . |
$$ . . . . . . . . . |[/go]


Click Here To Show Diagram Code
[go]$$B
$$ ------------------
$$ . . . X . 7 6 5 . |
$$ . . . X O 2 1 3 4 |
$$ . . . X O X O O . |
$$ . . X . O O X O X |
$$ . . . X X X X X . |
$$ . . . . . . . . . |[/go]


Click Here To Show Diagram Code
[go]$$B
$$ ------------------
$$ . . . X . . 3 . . |
$$ . . . X O 4 1 2 . |
$$ . . . X O X O O . |
$$ . . X . O O X O X |
$$ . . . X X X X X . |
$$ . . . . . . . . . |[/go]


I think this works.
Click Here To Show Diagram Code
[go]$$B
$$ ------------------
$$ . . . X . 5 . . . |
$$ . . . X O 3 4 1 . |
$$ . . . X O X O O 2 |
$$ . . X . O O X O X |
$$ . . . X X X X X . |
$$ . . . . . . . . . |[/go]


Click Here To Show Diagram Code
[go]$$B
$$ ------------------
$$ . . . X 6 . 7 . 5 |
$$ . . . X O 2 . 1 4 |
$$ . . . X O X O O 3 |
$$ . . X . O O X O X |
$$ . . . X X X X X . |
$$ . . . . . . . . . |[/go]


@hyperpape:
Problem 1 looks good.

For problem 2, did you consider this move?

Click Here To Show Diagram Code
[go]$$B
$$ ------------------
$$ . . . X . . . . . |
$$ . . . X O . . 1 2 |
$$ . . . X O X O O . |
$$ . . X . O O X O X |
$$ . . . X X X X X . |
$$ . . . . . . . . . |[/go]

_________________
be immersed

Top
 Profile  
 
Offline
 Post subject: Re: L19 Go Problem Championship: Round 4
Post #9 Posted: Tue Mar 14, 2017 10:18 pm 
Honinbo

Posts: 9545
Liked others: 1600
Was liked: 1711
KGS: Kirby
Tygem: 커비라고해
Shaddy wrote:
Problem 1 (3 points)
Click Here To Show Diagram Code
[go]$$B
$$ ------------------
$$ . . . . . X . 5 4 |
$$ . . . O X . X O 3 |
$$ . . O . O X X 1 2 |
$$ . . . O O , O O . |
$$ . . . . . O . . . |
$$ . . . . . . . . . |[/go]




Problem 2 (6 points)
Click Here To Show Diagram Code
[go]$$B
$$ ------------------
$$ . . . X . 4 . . . |
$$ . . . X O 3 . 2 1 |
$$ . . . X O X O O 5 |
$$ . . X . O O X O X |
$$ . . . X X X X X . |
$$ . . . . . . . . . |[/go]





Problem 3 (9 points)
Click Here To Show Diagram Code
[go]$$B
$$ | . . . . . . . . . .
$$ | . . . . X X X X . .
$$ | . . X X O O O X . .
$$ | . X . , O . O X . ,
$$ | . X O . O 1 2 X . .
$$ | . X O . . 3 4 . X .
$$ | . . . 5 O . . . X .
$$ ---------------------[/go]



@Shaddy:
Problems 1 and 3 look good. For Problem 2, did you consider if white responds in this way?
Click Here To Show Diagram Code
[go]$$B
$$ ------------------
$$ . . . X . . . . . |
$$ . . . X O 2 . . 1 |
$$ . . . X O C O O . |
$$ . . X . O O X O X |
$$ . . . X X X X X . |
$$ . . . . . . . . . |[/go]

_________________
be immersed

Top
 Profile  
 
Offline
 Post subject:
Post #10 Posted: Wed Mar 15, 2017 1:07 am 
Honinbo
User avatar

Posts: 8859
Location: Santa Barbara, CA
Liked others: 349
Was liked: 2076
GD Posts: 312
Hi Kirby, I appreciate any tips or comments. :) Thanks.

Top
 Profile  
 
Offline
 Post subject: Re: L19 Go Problem Championship: Round 4
Post #11 Posted: Wed Mar 15, 2017 2:10 am 
Lives in sente
User avatar

Posts: 1206
Liked others: 51
Was liked: 192
Rank: KGS 5d
KGS: Str1fe, Midorisuke
@Kirby

I didn't. Please mark me wrong on that one - thanks!

Top
 Profile  
 
Offline
 Post subject: Re:
Post #12 Posted: Wed Mar 15, 2017 7:43 am 
Honinbo

Posts: 9545
Liked others: 1600
Was liked: 1711
KGS: Kirby
Tygem: 커비라고해
EdLee wrote:
2017 Round 4.1 (010)
Click Here To Show Diagram Code
[go]$$B
$$ -------------------
$$ . . . . . X . . . |
$$ . . . O X . X O . |
$$ . . O . O X X . . |
$$ . . . O O , O O . |
$$ . . . . . O . . . |
$$ . . . . . . . . . |[/go]
At first I thought it was W to play. :)
Click Here To Show Diagram Code
[go]$$W
$$ ------------------
$$ . . . . . X . . . |
$$ . . . O X . X O . |
$$ . . O . O X X 1 . |
$$ . . . O O , O O . |
$$ . . . . . O . . . |
$$ . . . . . . . . . |[/go]
Click Here To Show Diagram Code
[go]$$B B dies
$$ -------------------
$$ . . . . . X 5 . 4 |
$$ . . . O X . X O 3 |
$$ . . O . O X X 1 2 |
$$ . . . O O , O O 6 |
$$ . . . . . O . . . |
$$ . . . . . . . . . |[/go]
Click Here To Show Diagram Code
[go]$$B ko
$$ -------------------
$$ . . . . . X . 5 4 |
$$ . . . O X . X O 3 |
$$ . . O . O X X 1 2 |
$$ . . . O O , O O . |
$$ . . . . . O . . . |
$$ . . . . . . . . . |[/go]
2017 Round 4.2 (011)
Click Here To Show Diagram Code
[go]$$B
$$ --------------------
$$ . . . X . . . . . |
$$ . . . X O . . . . |
$$ . . . X O X O O . |
$$ . . X . O O X O X |
$$ . . . X X X X X . |
$$ . . . . . . . . . |[/go]
Click Here To Show Diagram Code
[go]$$B :w2: @ (a) or (b) ; W dies
$$ --------------------
$$ . . . X . . . . . |
$$ . . . X O a b 1 . |
$$ . . . X O X O O 3 |
$$ . . X . O O X O X |
$$ . . . X X X X X . |
$$ . . . . . . . . . |[/go]
Click Here To Show Diagram Code
[go]$$B :w2: in 1st line grey area ; squeeze
$$ --------------------
$$ . . . X ? ? ? ? ? |
$$ . . . X O . 3 1 . |
$$ . . . X O X O O ? |
$$ . . X . O O X O X |
$$ . . . X X X X X . |
$$ . . . . . . . . . |[/go]
:study:
Click Here To Show Diagram Code
[go]$$B
$$ --------------------
$$ . . . X . . . . . |
$$ . . . X O . . 1 2 |
$$ . . . X O X O O . |
$$ . . X . O O X O X |
$$ . . . X X X X X . |
$$ . . . . . . . . . |[/go]

Click Here To Show Diagram Code
[go]$$B B kills only half, in sente ; hmm...
$$ --------------------
$$ . . . X . 5 . 6 . |
$$ . . . X O 3 4 1 2 |
$$ . . . X O X O O . |
$$ . . X . O O X O X |
$$ . . . X X X X X . |
$$ . . . . . . . . . |[/go]

Click Here To Show Diagram Code
[go]$$B
$$ --------------------
$$ . . . X . . . . . |
$$ . . . X O 4 3 1 2 |
$$ . . . X O X O O . |
$$ . . X . O O X O X |
$$ . . . X X X X X . |
$$ . . . . . . . . . |[/go]
:study:
Click Here To Show Diagram Code
[go]$$B W lives
$$ --------------------
$$ . . . X . 6 . 5 . |
$$ . . . X O O X X O |
$$ . . . X O . O O . |
$$ . . X . O O X O X |
$$ . . . X X X X X . |
$$ . . . . . . . . . |[/go]
:study:
Click Here To Show Diagram Code
[go]$$B
$$ --------------------
$$ . . . X . . . . . |
$$ . . . X O . . . 1 |
$$ . . . X O X O O . |
$$ . . X . O O X O X |
$$ . . . X X X X X . |
$$ . . . . . . . . . |[/go]
2017 Round 4.3 (012)
Click Here To Show Diagram Code
[go]$$B
$$ | . . . . . . . . . .
$$ | . . . . X X X X . .
$$ | . . X X O O O X . .
$$ | . X . , O . O X . ,
$$ | . X O . O . . X . .
$$ | . X O . . . . . X .
$$ | . . . . O . . . X .
$$ ---------------------[/go]
:study:
Click Here To Show Diagram Code
[go]$$B W lives...
$$ | . . . . . . . . . .
$$ | . . . . X X X X . .
$$ | . . X X O O O X . .
$$ | . X . , O . O X . ,
$$ | . X O . O 2 . X . .
$$ | . X O . . 1 . . X .
$$ | . . . . O . . . X .
$$ ---------------------[/go]
:study:
Click Here To Show Diagram Code
[go]$$B
$$ | . . . . . . . . . .
$$ | . . . . X X X X . .
$$ | . . X X O O O X . .
$$ | . X . , O . O X . ,
$$ | . X O . O 1 2 X . .
$$ | . X O 0 8 3 4 . X .
$$ | . . 9 7 O 6 5 . X .
$$ ---------------------[/go]

Click Here To Show Diagram Code
[go]$$Bm11
$$ | . . . . . . . . . .
$$ | . . . . X X X X . .
$$ | . . X X O O O X . .
$$ | . X . 1 O . O X . ,
$$ | . X O . O X O X . .
$$ | . X O O O X O . X .
$$ | . 2 X X O O X . X .
$$ ---------------------[/go]
:study:
Click Here To Show Diagram Code
[go]$$Bm13 :b2: W dies...
$$ | . . . . . . . . . .
$$ | . . . . X X X X . .
$$ | . . X X O O O X . .
$$ | . X . X O . O X . ,
$$ | . X O . O X O X . .
$$ | . X O O O X O . X .
$$ | . O 1 . O O X . X .
$$ ---------------------[/go]


@EdLee:
Problem 1 looks good.

Problem 2 looks to be on the right track. Did you consider this variation?
Click Here To Show Diagram Code
[go]$$B
$$ --------------------
$$ . . . X . . . . . |
$$ . . . X O 2 . . 1 |
$$ . . . X O C O O . |
$$ . . X . O O X O X |
$$ . . . X X X X X . |
$$ . . . . . . . . . |[/go]


For Problem 3, did you consider this option?
Click Here To Show Diagram Code
[go]$$B
$$ | . . . . . . . . . .
$$ | . . . . X X X X . .
$$ | . . X X O O O X . .
$$ | . X . , O . O X . ,
$$ | . X O . O 1 2 X . .
$$ | . X O . . 3 4 . X .
$$ | . . . 7 O 6 5 8 X .
$$ ---------------------[/go]

_________________
be immersed

Top
 Profile  
 
Offline
 Post subject: Re: L19 Go Problem Championship: Round 4
Post #13 Posted: Wed Mar 15, 2017 7:45 am 
Honinbo

Posts: 9545
Liked others: 1600
Was liked: 1711
KGS: Kirby
Tygem: 커비라고해
Shaddy wrote:
@Kirby

I didn't. Please mark me wrong on that one - thanks!


@Shaddy:
It's your call if you want to make an update. FWIW, you are very close.

_________________
be immersed

Top
 Profile  
 
Offline
 Post subject: Re: L19 Go Problem Championship: Round 4
Post #14 Posted: Wed Mar 15, 2017 8:47 am 
Tengen

Posts: 4380
Location: North Carolina
Liked others: 499
Was liked: 733
Rank: AGA 3k
GD Posts: 65
OGS: Hyperpape 4k
Kirby wrote:
For problem 2, did you consider this move?
Click Here To Show Diagram Code
[go]$$B
$$ ------------------
$$ . . . X . . . . . |
$$ . . . X O . . 1 2 |
$$ . . . X O X O O . |
$$ . . X . O O X O X |
$$ . . . X X X X X . |
$$ . . . . . . . . . |[/go]


Not sure, but it transposes, right?
Click Here To Show Diagram Code
[go]$$B
$$ ------------------
$$ . . . X . . . 5 . |
$$ . . . X O 4 3 1 2 |
$$ . . . X O X O O . |
$$ . . X . O O X O X |
$$ . . . X X X X X . |
$$ . . . . . . . . . |[/go]

_________________
Occupy Babel!

Top
 Profile  
 
Offline
 Post subject: Re: L19 Go Problem Championship: Round 4
Post #15 Posted: Wed Mar 15, 2017 8:52 am 
Tengen

Posts: 4380
Location: North Carolina
Liked others: 499
Was liked: 733
Rank: AGA 3k
GD Posts: 65
OGS: Hyperpape 4k
Problem 3:
Two moves jump out at me. I thought both failed, but now I'm unsure about the second. I'll have to review my attempt when I have more time.

Click Here To Show Diagram Code
[go]$$B
$$ | . . . . . . . . . .
$$ | . . . . X X X X . .
$$ | . . X X O O O X . .
$$ | . X . , O . O X . ,
$$ | . X O . O b . X . .
$$ | . X O . . a . . X .
$$ | . . . . O . . . X .
$$ ---------------------[/go]


Click Here To Show Diagram Code
[go]$$B
$$ | . . . . . . . . . .
$$ | . . . . X X X X . .
$$ | . . X X O O O X . .
$$ | . X . , O . O X . ,
$$ | . X O . O 4 3 X . .
$$ | . X O . 6 1 2 . X .
$$ | . . . . O . 5 . X .
$$ ---------------------[/go]


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

_________________
Occupy Babel!

Top
 Profile  
 
Offline
 Post subject: Re: L19 Go Problem Championship: Round 4
Post #16 Posted: Wed Mar 15, 2017 9:08 am 
Honinbo

Posts: 9545
Liked others: 1600
Was liked: 1711
KGS: Kirby
Tygem: 커비라고해
hyperpape wrote:
Kirby wrote:
For problem 2, did you consider this move?
Click Here To Show Diagram Code
[go]$$B
$$ ------------------
$$ . . . X . . . . . |
$$ . . . X O . . 1 2 |
$$ . . . X O X O O . |
$$ . . X . O O X O X |
$$ . . . X X X X X . |
$$ . . . . . . . . . |[/go]


Not sure, but it transposes, right?
Click Here To Show Diagram Code
[go]$$B
$$ ------------------
$$ . . . X . . . 5 . |
$$ . . . X O 4 3 1 2 |
$$ . . . X O X O O . |
$$ . . X . O O X O X |
$$ . . . X X X X X . |
$$ . . . . . . . . . |[/go]


@hyperpape:

Is white alive or dead?

_________________
be immersed

Top
 Profile  
 
Offline
 Post subject: Re: L19 Go Problem Championship: Round 4
Post #17 Posted: Wed Mar 15, 2017 9:18 am 
Honinbo

Posts: 9545
Liked others: 1600
Was liked: 1711
KGS: Kirby
Tygem: 커비라고해
hyperpape wrote:
Problem 3:
Two moves jump out at me. I thought both failed, but now I'm unsure about the second. I'll have to review my attempt when I have more time.

Click Here To Show Diagram Code
[go]$$B
$$ | . . . . . . . . . .
$$ | . . . . X X X X . .
$$ | . . X X O O O X . .
$$ | . X . , O . O X . ,
$$ | . X O . O b . X . .
$$ | . X O . . a . . X .
$$ | . . . . O . . . X .
$$ ---------------------[/go]


Click Here To Show Diagram Code
[go]$$B
$$ | . . . . . . . . . .
$$ | . . . . X X X X . .
$$ | . . X X O O O X . .
$$ | . X . , O . O X . ,
$$ | . X O . O 4 3 X . .
$$ | . X O . 6 1 2 . X .
$$ | . . . . O . 5 . X .
$$ ---------------------[/go]


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



@hyperpape:
You are pretty close.

Did you consider this?

Click Here To Show Diagram Code
[go]$$B
$$ | . . . . . . . . . .
$$ | . . . . X X X X . .
$$ | . . X X O O O X . .
$$ | . X . . O . O X . ,
$$ | . X O . O 1 2 X . .
$$ | . X O . . 3 4 . X .
$$ | . . . 7 O 6 5 8 X .
$$ ---------------------[/go]

_________________
be immersed

Top
 Profile  
 
Offline
 Post subject: Re: L19 Go Problem Championship: Round 4
Post #18 Posted: Fri Mar 17, 2017 11:42 pm 
Honinbo

Posts: 9545
Liked others: 1600
Was liked: 1711
KGS: Kirby
Tygem: 커비라고해
Solutions and the next round will be postponed until this weekend. I had some personal business today to attend to.

_________________
be immersed

Top
 Profile  
 
Offline
 Post subject: Re: L19 Go Problem Championship: Round 4
Post #19 Posted: Sat Mar 18, 2017 4:55 am 
Dies with sente

Posts: 122
Liked others: 20
Was liked: 13
Rank: 12kyu
Cool, maybe I can get one in just in time!


I can only find a solution that ends in Ko. Anything else baffles me!


Click Here To Show Diagram Code
[go]$$B
$$ ------------------
$$ . . . . . X . 5 4 |
$$ . . . O X . X O 3 |
$$ . . O . O X X 1 2 |
$$ . . . O O , O O . |
$$ . . . . . O . . . |
$$ . . . . . . . . . |[/go]

Top
 Profile  
 
Offline
 Post subject: Re: L19 Go Problem Championship: Round 4
Post #20 Posted: Sun Mar 19, 2017 12:42 pm 
Honinbo

Posts: 9545
Liked others: 1600
Was liked: 1711
KGS: Kirby
Tygem: 커비라고해
@mongus:
Looks good!

_________________
be immersed

Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 25 posts ]  Go to page 1, 2  Next

All times are UTC - 8 hours [ DST ]


Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group