(;GM[1]FF[4]SZ[19]
GN[However, White can push once like this, giving him a two point better result.]
PC[https://senseis.xmp.net/?GSATEProblem63]AP[GoWiki:2009]
DT[2024-11-16]
C[Diagram from https://senseis.xmp.net/?GSATEProblem63

However, White can push once like this, giving him a two point better result.]
PL[B]

AB[rb][nc][oc][rc][kd][md][nd][rd][me][qe][qf][lg][pg][mh][nh][ph]
AW[ra][ob][qb][pc][qc][od][qd][ne][pe][nf][pf][ng]

;B[pa]C[B1]MN[1]
;W[nb]C[W2]MN[2]
;B[mb]C[B3]MN[3]
;W[qa]C[W4]MN[4]

;
)
