# Estimating the score using half counting example

Keywords: Tactics

### Use half counting

Instead of counting both black and white territory, it is possible to count just one of them, using area counting. Especially in online games this is convenient, since you have to know the number of moves already played.

Asume you want to estimate the score in the following diagram. Note: It is black's turn. White has captured one stone. Black has captured two stones. 30 moves have been played.

• Select the color which looks easiest to count.
```    -> White
```

• Count the empty intersections, dead opponent stones and include not yet played border stones of the selected color (normally you do not count the latter, but only the expected empty points). Dead opponent stones count for only one point in this method.
```    -> Imagine it will end as in the diagram left.
``` Count territory plus not yet played white border stones

```    -> The total number of squares is 18.
```

• Add the number of board moves played/2 (round up for black, down for white). When counting for black, add the number of handicap stones minus one. Subtract this when counting for white.
```    -> 18 + 30/2 = 33
```
• Subtract the number of dead stones of the selected color including the already captured ones
```    -> Black captured 1 stone. 33 - 1 = 32
```
• Subtract the total board intersection/2. Multiply this result by 2.
```    -> 32 - 81/2 = -8.5
-> 8.5*2 = -17
```
```    -> -17 + 5.5 = -11.5