Dusk Eagle wrote:lorill, in your variation, isn't the ladder still good for black? I think white has to push in the top-right once more to achieve a ladder-breaker.
Yes, it's still good for black for now, but still a nice exercice I guess.
Post your ladders!
-
lorill
- Lives with ko
- Posts: 281
- Joined: Wed Apr 21, 2010 1:03 am
- Rank: yes
- GD Posts: 0
- Location: France
- Has thanked: 69 times
- Been thanked: 25 times
Re: Post your ladders!
Yes, it's still good for black for now, but still a nice exercice I guess.
-
mitsun
- Lives in gote
- Posts: 553
- Joined: Fri Apr 23, 2010 10:10 pm
- Rank: AGA 5 dan
- GD Posts: 0
- Has thanked: 61 times
- Been thanked: 250 times
Re: Post your ladders!
Here is the most difficult problem I have seen involving a ladder. The solution is over 20 moves deep and makes a good reading exercise even when you know the answer.
Start:
Finish:
Start:
Finish:
-
jts
- Oza
- Posts: 2662
- Joined: Sat Sep 18, 2010 4:17 pm
- Rank: kgs 6k
- GD Posts: 0
- Has thanked: 310 times
- Been thanked: 632 times
Re: Post your ladders!
Ah, that's a good one. It reminds me of this: http://senseis.xmp.net/?TheFirstRecorde ... derBreaker
-
daal
- Oza
- Posts: 2508
- Joined: Wed Apr 21, 2010 1:30 am
- GD Posts: 0
- Has thanked: 1304 times
- Been thanked: 1128 times
Re: Post your ladders!
Here is a set of ladder problems that usagi presented a while ago on KGS. Apparently he made several sets at various levels. An excerpt of the kibbitz:
usagi [1d]: this is level 5
usagi [1d]: my own designs hehe
...
adoreme [-]: ddk level?
usagi [1d]: This one is sdk level
adoreme [-]: orly?
pentatonic [8k]: i already got one wrong earlier
adoreme [-]: penta did you read kageyama?
pentatonic [8k]: what's kageyama?
goatsunday [6k]: ^^
..
adoreme [-]: kageyama's fundamentals of go
goatsunday [6k]: he says that you should practice reading ladders until reading them is easy
pentatonic [8k]: ah okay
usagi [1d]: He just passed away a year or two ago.
adoreme [-]: yes very sad
usagi [1d]: Yes that is why I made these problems, in his honor
...
adoreme [-]: for anyone who read kageyama those problems should be ddk level
usagi [1d]: Not #4
usagi [1d]: #4 is one of those problems where you have to know the tesuji
usagi [1d]: this is level 5
usagi [1d]: my own designs hehe
...
adoreme [-]: ddk level?
usagi [1d]: This one is sdk level
adoreme [-]: orly?
pentatonic [8k]: i already got one wrong earlier
adoreme [-]: penta did you read kageyama?
pentatonic [8k]: what's kageyama?
goatsunday [6k]: ^^
..
adoreme [-]: kageyama's fundamentals of go
goatsunday [6k]: he says that you should practice reading ladders until reading them is easy
pentatonic [8k]: ah okay
usagi [1d]: He just passed away a year or two ago.
adoreme [-]: yes very sad
usagi [1d]: Yes that is why I made these problems, in his honor
...
adoreme [-]: for anyone who read kageyama those problems should be ddk level
usagi [1d]: Not #4
usagi [1d]: #4 is one of those problems where you have to know the tesuji
- Attachments
-
- usagi's ladder probs nr. 5.sgf
- (334 Bytes) Downloaded 971 times
Patience, grasshopper.
-
Laman
- Lives in gote
- Posts: 655
- Joined: Thu May 06, 2010 10:24 pm
- Rank: 1d KGS
- GD Posts: 0
- KGS: Laman
- Location: Czechia
- Has thanked: 29 times
- Been thanked: 41 times
- Contact:
Re: Post your ladders!
this thread reminded me an ultimate ladder game i saw few weeks ago at a go camp. unfortunately i don't remember names of the players (i think they were Korean, game few years old) and i was able to obtain only short part of sgf that is not even guaranteed to be correct (and failed to find the game in the GoGoD). if anyone recognizes the game, please tell me, it would be great to have the complete sgf
short commentary:
short commentary:
- Attachments
-
- ultimate-ladder1.sgf
- (501 Bytes) Downloaded 912 times
Spilling gasoline feels good.
I might be wrong, but probably not.
I might be wrong, but probably not.
-
lorill
- Lives with ko
- Posts: 281
- Joined: Wed Apr 21, 2010 1:03 am
- Rank: yes
- GD Posts: 0
- Location: France
- Has thanked: 69 times
- Been thanked: 25 times
-
crux
- Lives with ko
- Posts: 200
- Joined: Wed Apr 21, 2010 6:42 am
- Rank: IGS 2d+
- GD Posts: 0
- KGS: venkman, M2Brett1
- Has thanked: 35 times
- Been thanked: 23 times
Re: Post your ladders!
mitsun wrote:Here is the most difficult problem I have seen involving a ladder. The solution is over 20 moves deep and makes a good reading exercise even when you know the answer.
Yes, that's one of my favourites too. In case someone wants to see the whole game, it's Cho Chikun - Kobayashi Satoru, 20th Kisei Final Game 2 (1996). Go World 76 has commentary. The game result is slightly different from the one given in mitsun's answer.
-
jts
- Oza
- Posts: 2662
- Joined: Sat Sep 18, 2010 4:17 pm
- Rank: kgs 6k
- GD Posts: 0
- Has thanked: 310 times
- Been thanked: 632 times
Re: Post your ladders!
This file is what I have so far. I haven't added Laman's game because I'm not quite sure how to present it as a problem, and I somehow missed Lorrill's latest.
I've been doing at least one every day it and makes reading ladders in games a lot easier. I can now read ladders where the sequence that creates the ladder isn't on the board yet, which wasn't possible two weeks ago.
I've been doing at least one every day it and makes reading ladders in games a lot easier. I can now read ladders where the sequence that creates the ladder isn't on the board yet, which wasn't possible two weeks ago.
- Attachments
-
- Ladders and Nets.sgf
- (5.82 KiB) Downloaded 562 times
-
Solomon
- Gosei
- Posts: 1848
- Joined: Tue Apr 20, 2010 9:21 pm
- Rank: AGA 5d
- GD Posts: 0
- KGS: Capsule 4d
- Tygem: 치킨까스 5d
- Location: Bellevue, WA
- Has thanked: 90 times
- Been thanked: 835 times
Re: Post your ladders!
For some reason, I found myself trying to figure out the most feasible way this could come up in a game...:mitsun wrote:Here is the most difficult problem I have seen involving a ladder. The solution is over 20 moves deep and makes a good reading exercise even when you know the answer.
-
Shaddy
- Lives in sente
- Posts: 1206
- Joined: Sat Apr 24, 2010 2:44 pm
- Rank: KGS 5d
- GD Posts: 0
- KGS: Str1fe, Midorisuke
- Has thanked: 51 times
- Been thanked: 192 times
-
Solomon
- Gosei
- Posts: 1848
- Joined: Tue Apr 20, 2010 9:21 pm
- Rank: AGA 5d
- GD Posts: 0
- KGS: Capsule 4d
- Tygem: 치킨까스 5d
- Location: Bellevue, WA
- Has thanked: 90 times
- Been thanked: 835 times
-
Marcus
- Gosei
- Posts: 1387
- Joined: Tue Apr 20, 2010 8:51 am
- GD Posts: 209
- KGS: Marcus316
- Has thanked: 139 times
- Been thanked: 111 times
Re: Post your ladders!
There's a nifty ladder problem I posted in my Study Journal here: http://lifein19x19.com/forum/viewtopic.php?p=65592#p65592
-
jts
- Oza
- Posts: 2662
- Joined: Sat Sep 18, 2010 4:17 pm
- Rank: kgs 6k
- GD Posts: 0
- Has thanked: 310 times
- Been thanked: 632 times
Re: Post your ladders!
Here's the latest version, with new ladder problems from lorill, araban, marcus, and ez4u. There are now 26 problems.
If you see an interesting ladder somewhere else in the forum feel free to link to it. I'll probably see it anyway, but I might forget to add it the next time I update the SGF.
I'm also on the lookout for more problems where capturing in a ladder is a failure, because there is a net available. I only have two problems like that.
edit: added the sgf inside the viewer
If you see an interesting ladder somewhere else in the forum feel free to link to it. I'll probably see it anyway, but I might forget to add it the next time I update the SGF.
I'm also on the lookout for more problems where capturing in a ladder is a failure, because there is a net available. I only have two problems like that.
edit: added the sgf inside the viewer
- Attachments
-
- Ladders and Nets.sgf
- (8.21 KiB) Downloaded 748 times