Life In 19x19

Posted: **Thu Nov 27, 2014 10:26 am**

RobertJasiek wrote:Herman, 14 points = 1 rank is a miai value.

Huh? As I understand it:

Deiri counting counts the swing between "black plays first" and "white plays first", while ignoring gote/sente/tally/etc. So, on an empty board, the deiri value for the first move is twice the perfect komi, which is thought to be 7. (Additional stones of handicap seem to roughly adhere to that 14 points per stone.)

Miai counting counts the gain (net count / local tally) from a move.

IMO, one of the easiest methods to determine the miai value of a move in a position is to replicate it a number of time (e.g. three so-called half-point kos can be used to show that the miai value of a move in the ko is actually 1/3).

So suppose we set up two empty boards. If black plays first on both, he should win by 14 points (summed board values, ignoring komi). If both players play first on one board, the result should be a tie. So the difference of 14 points, divided by the tally of 2 is 7 points per move. So the miai value of the first move is 7.

Right?

Posted: **Thu Nov 27, 2014 10:38 am**

HermanHiddema wrote:
RobertJasiek wrote:Herman, 14 points = 1 rank is a miai value.

Huh? As I understand it:

Deiri counting counts the swing between "black plays first" and "white plays first", while ignoring gote/sente/tally/etc. So, on an empty board, the deiri value for the first move is twice the perfect komi, which is thought to be 7. (Additional stones of handicap seem to roughly adhere to that 14 points per stone.)

Miai counting counts the gain (net count / local tally) from a move.

IMO, one of the easiest methods to determine the miai value of a move in a position is to replicate it a number of time (e.g. three so-called half-point kos can be used to show that the miai value of a move in the ko is actually 1/3).

So suppose we set up two empty boards. If black plays first on both, he should win by 14 points (summed board values, ignoring komi). If both players play first on one board, the result should be a tie. So the difference of 14 points, divided by the tally of 2 is 7 points per move. So the miai value of the first move is 7.

Right?

Suppose that correct komi is 7. Suppose also that the (correct) first play gains 7 points in gote. Then the proper komi for the rest of the board is 0. But that cannot be right. We know that the proper komi for the rest of the board is 7 or almost 7, and that the value of plays gradually reduces, except for some exciting sequences.

Now suppose that the first play gains 14 points in gote. Then we know that the proper komi lies between 14 and 0. Rough estimate: 7. Working backwards, if correct komi is 7, then we estimate that the first play gains 14 points.

Posted: **Fri Nov 28, 2014 3:22 am**

Lost points of endgame(-like) mistakes for the sake of assessing potential rank improvement. Not counting mistakes that were corrected with delay. Avoiding double counts due to overlapping / changing locales as far as possible. Therefore the totals are smaller than the sum of all losses in terms of per move values.

Total:

Black = 50 points = 3.6 ranks
White = 35 points = 2.5 ranks

The score is greater because Black made more other mistakes especially during the opening.

1 rank = 14 points.

Rank improvement refers to real world ranks, not to server ranks. Rank improvements must be put in relation to the fraction of scored games versus early resigned fighting games.

Life In 19x19

Endgame: Lost Points

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