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Handicap for smaller board sizes
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    Keywords: Equipment

Regarding handicap games, the following table gives one possible way of allocating handicap and komi on 13x13 boards. First column: Strength difference on 19x19 goban, second column, handicap on 13x13 goban, third column, komi to white.

 Difference  13x13   Komi   Difference   13x13   Komi
    0         0      5.5       10        4       5.5
    1(*)      0      5.5       11        4       2.5
    2         0      2.5       12        4       0.5
    3         0      0.5       13        5       5.5
    4         2      5.5       14        5       2.5
    5         2      2.5       15        5       0.5
    6         2      0.5       16        6       5.5
    7         3      5.5       17        6       2.5
    8         3      2.5       18        6       0.5
    9         3      0.5       19        6      -3.5

(*) In the case of a one stone difference in strength, the weakest player takes black and plays first.


The Cambridge club ([ext] http://www.cam.ac.uk/societies/cugos/) uses a different system for its end-of-term 13x13 handicap competitions. These are played with fast time limits of 10 minutes each. In that case

 2.5 grades = 1 handicap stone

seems to be correct; details at [ext] http://www.cam.ac.uk/societies/cugos/compete/sono.htm Charles Matthews


On RGG, Tim Hunt posted his recommendations

 Grade          13x13 board          9x9 board
 Difference     Handicap   Komi     Handicap   Komi
    0              1        6          1        6
    1              1        2          1        4
    2              1       -2          1        2
    3              2        4          1        0
    4              2        0          1       -2
    5              2       -4          1       -4
    6              3        2          2        4
    7              3       -2          2        2
    8              4        4          2        0
    9              4        0          2       -2
   10              4       -4          2       -4

Charles Tim was a Cambridge player for many years. This is a 'smoothed' version of the system, adopting a Japanese practice of reverse komi. Actually I think this makes it easier for White.



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This is a copy of the living page "Handicap for smaller board sizes" at Sensei's Library.
(OC) 2003 the Authors, published under the OpenContent License V1.0.