group has to be patched stepwise as follows:
1. To each player who cannot play any opponent in his score group (the island) find a
suitable opponent due to chapter 7.1 in the next lower score group;
2. If the number of players in a score group is odd (after step 1 has been done) find a suitable
additional player due to chapter 7.2 in the next lower score group;
3. Equalize the number of players with due color white and black (chapters 7.3 and 7.4).
Now let's examine some examples of non-standard cases.
"Island" case (chapter 7.1 FDS)
In a score group we can have n islands. In the case of one island his opponent is looked for in the
next lower score group with the following priority:
1. opposite due color
2. highest rating
3. lowest ARO
4. same due color
5. highest rating
6. lowest ARO
For example, in the following situation:
----------------------------------------------Group 4, score = 6
----------------------------------------------white | black
ID
ARO
Rat c u |
ID
ARO
Rat c u
--------------------------------------------34 1707.0 1570
|
29 1697.1 1613
35 1823.6 1565
|
----------------------------------------------Group 5, score = 5.5
----------------------------------------------white | black
ID
ARO
Rat c u |
ID
ARO
Rat c u
--------------------------------------------32 1700.4 1580
|
8 1864.7 2156
N
7 1891.3 2202
|
20 1823.8 1700
|
28 1844.7 1622 F
Player 35 is an island because he has already played with 34 and 29. Vega found for him the
opponent 20 (please note that the compatible opponent 8 with higher rating than 20 is stopped by
the flag u=N). To understand the messages of Vega in the verbose.txt file the user should know that
when a player is transferred:
• D symbol refers to the lower score group (Down);
• U symbol refers to the higher score group (Up);
• D and U are followed by a number that says how many pairs we can realize in that group
with the remained players. For example, D=2 means that down, after a player has been
removed, the remained players can realize 2 pairs; U=3 means that up, with the arrival of a
new player, it is possible to do 3 pairs;
• The number that follows D or U can be positive or negative. If it is negative then it
represents the maximum possible number of pairs that we can realize in that group. So
when Vega try to get an opponent to make even a group it tries to choose the one that
maximise U and D to limit the floaters.
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