(;GM[1]FF[4]SZ[19]
GN[Natural exchange]
PC[http://senseis.xmp.net/?BeginnerGameSample1]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?BeginnerGameSample1

Natural exchange]
PL[B]

AB[qp][iq][nq]
AW[cp][op][oq]

;B[pq]C[B1]MN[1]
;W[or]C[W2]MN[2]

;
)
