Configure GnuGo to use positional superko

Iomrascálaí uses positional superko when it plays under chinese rules
whereas GnuGo just uses simple ko.

Author: ujh

bin/benchmark

@@ -52,7 +52,7 @@ set -x
 
 cargo build --release
 
-GNUGO="gnugo --mode gtp --level 0 --chinese-rules"
+GNUGO="gnugo --mode gtp --level 0 --chinese-rules --positional-superko"
 IOMRASCALAI="cargo run --release -- --log --rules chinese"
 REFEREE="$GNUGO"
 

bin/play-gnugo

@@ -44,7 +44,7 @@ fi
 
 cargo build --release
 
-GNUGO="gnugo --mode gtp --level 0 --chinese-rules"
+GNUGO="gnugo --mode gtp --level 0 --chinese-rules --positional-superko"
 IOMRASCALAI="cargo run --release -- --log --gfx --rules chinese"
 
 

misc/clop/lib/run.rb

@@ -69,7 +69,7 @@ def time(seed)
 end
 
 def gnugo
-  "gnugo --mode gtp --level 0 --chinese-rules"
+  "gnugo --mode gtp --level 0 --chinese-rules --positional-superko"
 end
 
 def referee