Posts Tagged ‘cho chikun’

Kisei Title: the final game

Wednesday, March 19th, 2008
The first day of game 7 of the Kisei title has ended. This is the last game of the series because the Kisei title follows a “best of seven” system, and the score so far is 3-3. The following diagram shows the position at the end of day 1. The last move was Yamashita’s (White) 44. Cho will likely play the sealed move as a jump to the left of his stones in the center, putting pressure on the White group in the center-left.

Kisei 2008, game 7, day 1

The rest of the game tomorrow will decide who will hold the top Japanese Go title this year. (Link to the game record)

Kisei title goes all the way to the 7th game

Friday, March 14th, 2008
Cho Chikun won game 6 of Kisei by 4.5 points and evened the score to 3-3 (after being led 3-1 earlier).

Kisei 2008, game 6

Yamashita’s early attack in the upper right during day 1 and the resulted thickness in the center didn’t pay off in the end, though: Cho’s territory prevailed so the Kisei title is going all the way to the 7th game! The following diagram shows what happened after Yamashita’s attack in the upper-right ended: Black took profit on the left side (although the captured White stones still have aji), but White also became very strong in the lower-left. Also, White’s kikashi with 72 is put to good use later, when White cuts with 94.

Kisei 2008, game 6, moves 72-94

(Link to the title page)

Kisei Title, game 6, day 1

Thursday, March 13th, 2008
Yamashita leads 3 to 2 after the first 5 games: one more win and he can keep the Kisei title one more year, while Cho needs 2 consecutive wins to capture the title. After day 1 in game 6 I like Yamashita’s (Black) position more: after the first 47 moves or so White had to invade Black’s deep moyo and felt under attack, so Black built a lot of thickness in the center. And the attack is not over yet.

Kisei 2008, game 6, day1

(Link to the Kisei Title page, including game records)

Judan Title: Takao Shinji – Cho Chikun 1-0

Thursday, March 6th, 2008
The challenger in the Judan Title, Takao Shinji (who is also the Honinbo Title holder) won the first game against Cho Chikun (who is also playing the Kisei Title match) by resignation. Here is the beginning of the game (Takao played Black):

Takao Shinji vs Cho Chikun

It is interesting to notice the exchange of 24 for 25: White peeps at a point where he could cut later. I have seen this move in several games lately. Also, after Black’s invasion in san-san with 31 it’s a touch decision for White to pick the side to block on: in this case the decision has nothing to do with the potential White would develop on the outside (because that potential is too small to be interesting anyways, given that White has low extensions on both sides), but with the fight that starts once Black is forced to capture one stone.

Here’s a nice photo montage from the Nihon Ki-in site:

Judan Sen 2008

Kisei Title: Cho closes the gap

Thursday, February 28th, 2008
Kisei game 5 ended with Cho’s 3.5 points victory.

Cho Chikun after winning game 5 of 2008 Kisei

One of the most interesting parts of the game was the sacrifice that Cho (playing Black) made on the right side instead of living by playing in 3×3 (see the sequence shown in the next 2 diagrams): as a result, he got thickness into the center that translated later, among other advantages, into a quite large territory on the lower side.

The score is now 3-2 for Yamashita. Next game is on March 12th.

Kisei Title, game 5, day 1

Wednesday, February 27th, 2008
Game 5 of the Kisei title started today: Cho (Black) played the last move of day one (49, in the upper-right corner) before Yamashita sealed his next move. While Cho cannot afford to lose any other game, Yamashita has a comfortable 3-1 lead so he only needs to win one of the next 3 games (including this one) in order to win this match and keep the title.

kisei 2008, game 5, day 1

Black seems to have more territory, but he also has several groups on the right hand side to worry about. The game will continue tomorrow.

Kisei Title – can Cho recover from 1-3?

Tuesday, February 26th, 2008
The next Kisei Title game between Yamashita Keigo and Cho Chikun will be today. Yamashita leads Cho 3-1, which means that one more win will assure Yamashita of keeping his title again this year. Will Cho be able to make a recovery from this uncomfortable score? The Nihon Ki-in website published a table with the history of best-of-seven titles where one of the players recovered from 1-3 (or even from 0-3) to win the title. Out of 10 such cases, Cho recovered 3 times from 0-3 to win the title: against Fujisawa Shuko in Kisei, 1983, against Otake Hideo in Meijin, 1984, and against Kobayashi Koichi in Honinbo, 1992. Cho also came back once from 1-3 to win the Honinbo title in 1990, also against Kobayashi Koichi. Cho was also on the the other side of “miraculous comebacks” once: he led 3-0 against Rin Kaiho in Honinbo 1983 before losing the title 3-4.

So Cho Sensei is the master of comebacks. He is renowned for doing his best under pressure. I’m sure we’ll see an exciting game later today!

Yamashita just one win away from defending Kisei Title

Friday, February 22nd, 2008
Yamashita Keigo leads Cho Chikun 3-1 in the Kisei Title match. Yamashita won game 4 in which Cho seemed to have had a comfortable position for the first 160 moves or so. White’s slack play a little bit earlier allowed Black to play a beautiful double purpose move with 165 (the circle marked Black stone in the lower right) which threatens White’s positions on both lower and right sides. In the game Cho defended his right hand side group and Yamashita laid wasted on White’s lower side territory. The diagram shows what happens if White defends the lower side instead: his right side group dies.

kisei 2008 game 4 - black's winning move

Kisei game 4 started today

Thursday, February 21st, 2008
Kisei game 4 started today, it will conclude tomorrow. This is an important game: at 2-1 for Yamashita, one more win will bring him just one step away from defending his title against Cho. Here is the situation so far (click on the board image to download the game record). It is amazing how quickly the position turned into a non-standard variation in the lower-left corner.

Kisei 2008, game 4

On a related note, Cho Hye Yeon 7p of Korea was wondering what did Cho Chikun think about during day one of game 3 (when only 25 moves were played). Read her wonderful “Only a matter of TIME” article – it is very interesting and informative with respect to (decreasing) time limits in professional tournaments.

Takao Shinji (Honinbo) is Judan challenger

Thursday, February 7th, 2008
Takao Shinji (on the right hand side in the photo) defeated Cho U in the playoff for becoming Judan challenger. (link to the game)

Judan challenger playoff 2008

Cho Chikun is Judan title holder, and the first game will be played on March 6th.