Environmental Go Game

214 moves

214 moves

 

Black	White
20	19½
19	18½
18	17½
17	16½
16	15½
15	14½
14	move in empty corner
13½	13
move in empty corner	move in empty corner
12½	move in empty corner
12	11½
12-move sequence on one side of board
11	one move
10½
	10
9½	9
one move	one move
8½	8
7½	7
one move	6½
one move	6
two moves
5½
three moves
5	4½
35 moves
	4
seven moves
	3½
eight moves
3
seven moves
2½
four moves
	2
1½
13 moves
1
nine moves
½
twelve final moves

Totals	Black	White
Cards	22	18
Card points	223	187
Area	166	195
Prisoners	35	40
Territory	29	49
Komi		9½
Area+Card points+Komi	389	391½
Prisoners+Territory+Card points+Komi	287	285½

Under area scoring (as with the SST rules, which were in use) White wins by 2½ points.
Under territory scoring Black wins by 1½ points.

My count is slightly different from the official one. No doubt I have miscounted. My conclusion is the same: White wins by area rules, Black wins by territory (Japanese) rules.

Some uninformed comments: the rules

The game was played under area rules (SST).

The play in the yose suggests that the players thought they were using territory rules.

A move played under area rules is worth one more point than if played under territory rules, when compared with tokens.

Therefore there is an uncertainty of one point in any conclusions drawn from the taking of the tokens.

Moreover, The SST rules for handicap stones give Black the extra points for the extra stones, while orthodox Chinese rules don't. Both players are familiar with orthodox Chinese rules, and may have assumed that the extra white stones played would be counted as handicap stones.

More uninformed comments: the game

I observe that there was a tendency for White to "follow the lead" of Black. There were six sequences of the form card-move-move-card or move-card-card-move, and in five of these it was Black who twice changed the "lead" and White who followed.

If I did not know who the players were, I might guess from this that Black was male, and White was female and was allowing herself to be pushed around. In fact, Rui Naiwei is far too strong a Go player, and far too strong a character, for this conclusion to be appropriate.

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Professor Berlekamp's commentary on the game.