(;GM[1]FF[4]SZ[19]
GN[High-low double approach]
PC[http://senseis.xmp.net/?BQM399]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?BQM399

High-low double approach]
PL[B]

AB[dd]
AW[fc][df]


;
)
