(;GM[1]FF[4]SZ[21]
GN[Diagram of book problem]
PC[http://senseis.xmp.net/?posting=5877]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?posting=5877

Diagram of book problem]
PL[B]

AB[rs][qt][st]
LB[tq:o][sr:x][tr:o][ts:o]


;LB[tq:o][sr:x][tr:o][ts:o]
)
