09 Mar 2010 No Comments

Student OZA Round 3 Report

Sorry for long time in coming! I’m stuck in Tokyo with reasonably limited internet access. The third round of the Student OZA was held on March 3rd.

XiangLong Meng, the male rep of China and favorite of the competition pulled a convincing win against the Japanese OZA, who was my opponent for the first game. Meanwhile, the male rep of Korea defeats the second male rep of Japan. This leaves Japan out of contention for first and second place. The student OZA champion will now be decided between China and Korea.

Artem vs Danigabi in round 3. I'm in the background, mulling over a difficult fight.

The rest of the results did not yield much surprise. Artem defeats Gabriel (Danigabi from KGS), and now rises as the top ranked player out of all nations not in the `Big 4′. This allows him to finally challenge another player from the Big 4 in the final round. Meanwhile, Nuttakrit of Thailand, who scored a lucky win vs Zhang Xiang the day before due to a missed atari, was convincingly destroyed byYucheng Lai, the male rep of Taiwain.

• Fun fact: Yucheng Lai was 2nd in the World Amateur championships when he was 15.

As for me, my opponent Zhang Xiang is reasonably strong, defeating Supertjc  (8d on KGS) in the Singapore Youth League and Bloodarena (7d KGS) in the Singapore national cup. It is unfortunate that I matched up with him, given he should be in the 1-1 group, if not for his unlucky mistake!

Unfortunately, my luck didn’t quite change this round! The game started at a disadvantage due to a mistake on my part in a complicated fighting joseki. Though, by exploiting a ladder for exchange and a heated mid game fight, I had restored the game to an even position. Unfortunately, my backing out of a `fight or die’ situation during bouyomi, and an casual misjudgment of the strength of one of his groups, Zhang Xiang managed retook the lead.

A mistake near the end game saw me draw the game dangerously close, but my yose  during bouyomi was not as consistent. A few mistakes, and one missed opportunity saw Zhang Xiang take the win.  The game is filled with fighting, and should be rather enjoyable to see:

Black 15: This starts are very difficult joseki, a mistake on either side could cost the game.
White 26: A mistake in order by me, white should play D-17 first. Black 29 exploits this error, at this point, if white plays D-17, black will capture at A-16 instead of connecting. By Black 29, I was forced into an unfavorable variation. White is completely sealed on the left side, but black still has an excellent tesuji at H-17 to access the top.
White 46: This was a good move, threatening the ladder is black continues with Joseki. Zhang Xiang was forced to concede a loss on the bottom left corner. The black stone is not completely dead though, so the game still favors black.
Black 48: A mistake, black should play 51 immediately. This gave me an opportunity to fix my shape, so that I could black with 52, starting a large scale fight.
White 57: Difficult choice here on whether to defend the top or the middle. If played at M-17, I feared black can form an impressive moyo on the right by attacking my group with K-11.
White 76: This is the move that made sacrificing the corner worth it, Black is under severe attack, and concedes much of the center influence to white. The dust settles at 102 and Black has lost his advantage.
White 110: This was a mistake. The play on the fourth line was meant to threaten black’s center group, but I had forgotten that black can live in sente with N13. A move at L3 for territory or R6 to prevent ladder breakers would be much more appropriate. When black plays at M3, white is at a loss for good follow-ups. By 116, Black has easily secured a large corner (A 3-3 invasion would be dangerous, since it breaks the center ladder)
White 116: Another mistake, P-6 is much bigger.
Black 121: White’s moyo vanishes, as black punishes whites mistake at 116.
White 126: In buyoumi, I played the safe move. However, white was in no position to concede territory. White had to play Q6, followed by a cross-cut, resulting in a difficult battle for both. By 135, black’s corner is now larger than white’s right side, I am about 20 points behind.
Black 153: Zhang Xiang must of thought this sente, threatening a possible invasion. However white could ignore this, giving white a chance with the huge move at 154 (Though I should have played T-18 first).
White 190: A terrible mistake played during byoumi, spoiling all aji on the left side. White should play sentes first, and the save the two stones with D-10. Black will be forced to eventually captured at A-12, the difference could be well over 10 points. This mistake cost white any chances of winning without a serious error by Black.
Black 209: Not sente and a serious error! Final opportunity for white. If white plays Q18 now, blacks top right corner will suffer serious point loss in points, and possibly die. Unfortunately, I didn’t think quite so clearly, and missed the opportunity!

So going into the final around, I’m forced with the unfortunate prospect of fighting to prevent last place. Though for the first time, its actually with an opponent who I should have good chances in winning!

by Mile Gu in Analysis, Tournaments Tags: Student OZA