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Monday, September 13, 2010

Shusaku Game 5 - Part 2

If you missed the first installment and want to catch up go right ahead, we'll still be here, ready? Awesome, lets get going. Shusaku is playing black and this game is from 1840 when Shusaku was ten or eleven. In this game he takes three stones. Throughout this post I keep track of the score so this would be a good opportunity to practice your counting as well. While my own method is by no ways perfect it allows me to keep a fairly precise idea of established territory. This can be useful as if you are behind by more than ten points it usually helps to attack while if you are ahead by ten points you can be happy with simplifying the game.

Figure 1
106 - 126

Black puts his strength to use by invading at 6. White responds by holding down with 7 and building outside strength. Black continues to harass white on the outside and then switches to 26 which robs white's large group of its second eye. Black plays this because of the continuation that will be forced around the L8 point but this stratagem seems somewhat doubtful in that it is likely to weaken the large black group stretching out from the lower left in order to attack the floating white group up top. 

There is very little certain territory but white here has about 6 points in both the lower left and upper right as well as about 10 points in the lower right. His group on the upper left side only has about five points of territory of if black gets to play A18 which is a huge endgame move for both sides. This gives white about 27 points of sure territory. Black, on the other hand, has perhaps five points of sure territory throughout the lower side plus five points in the upper left and another six on the upper right side. This makes for only 16 points. Black has a considerable advantage in influence however and will look to make up the difference by attacking. To be trailing so much in territory entering the middlegame is troubling but this is mostly because of Shusaku's mild fuseki. Black can make maybe 20 points in the center so his game is not bad yet. White must feel good with the situation being semi-equal after taking a three stone handicap.

Figure 2
127 - 153

White threatens to make another eye with 27 and when that is denied pushes out with 29. Here black gives way with 30 allowing white to connect at 31 which puts the black stones below in a precarious position. We see black's plan with 32 and the following harassment of the floating white stones though to white 43 which firmly establishes the connection to the secure white group below. Now both sides take some large points and black is canny in taking 44 instead of 45. Both these moves are large but if black plays at 45 and white plays at 44 white would have a good follow up move around G13 whereas there is no large scale continuation for white 45. This allows black to keep sente to block at 46 which creates some serious problems with white's shape in the lower right corner. After the quick sequence where black exchanges 48 and 50 for 49 and 51 black takes another large point with 52 and white follows suite at 53. 

Now the territories are even more set so lets look at the score so far. Black has solidified his territory at the bottom right and now has about 10 points of sure territory, adding the eyes of the group on the lower left we can estimate about 13 points for the bottom. Black has expanded his territory at the top to about 14 points plus one for the eye at S13 makes 15. The big increase has come in the center where black has made about 16 points of sure territory and this might later swell to closer to 24 depending on the in game play. Total this and you have 44 total points for black. 

White's lower right corner is in trouble so we might count two points for white at T4 and T5 but this is no longer solid territory for him. He has expanded the right side to 12 points so we can count 14 for him here. The upper right and lower left corners are still at 6 apiece for 12 total points here and there. This shows the value of counting early to get estimates, many situations don't change and if you already know that these two corners are a certain value you can rapidly make accurate estimates of the scores in your games. White has also expanded the upper left and now has about 13 points here. With the couple other small patches in the lower right center and the two spaces at B7 and C7 (which count double since they were captures) we can add another 7 points to white's total. That gives white a total of 44 as well. While my counting isn't the most accurate in the world (the lower right corner is actually worth 7 points, among other minor assumptions here and there) it shows how close this game is.

Hmmmm... This has turned into a sort of counting workshop so let us go over my technique for counting in a post soon. Next time see the thrilling conclusion of this very close game, till then, keep playing and have fun.

Continue on to Part 3

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