(;GM[1]FF[4]SZ[9]
GN[What does White 4 achieve?]
PC[http://senseis.xmp.net/?AlterPedroTeachingGame]AP[GoWiki:2009]
DT[2019-01-07]
C[Diagram from http://senseis.xmp.net/?AlterPedroTeachingGame

What does White 4 achieve?]
PL[B]

LB[gf:a]

;B[gc]C[B1]MN[1]
;W[dc]C[W2]MN[2]
;B[ee]C[B3]MN[3]
;W[fd]C[W4]MN[4]

;LB[gf:a]
)
