(;GM[1]FF[4]SZ[19]
GN[Sacrifice and win]
PC[https://senseis.xmp.net/?GokyoShumyoSection4Problem20/Solution]AP[GoWiki:2009]
DT[2022-12-29]
C[Diagram from https://senseis.xmp.net/?GokyoShumyoSection4Problem20/Solution

Sacrifice and win]
PL[W]

AB[db][eb][fb][gb][cc][cd][ce][bf][bg][cg]
AW[bb][cb][hb][dc][fc][gc][ic][dd][de][cf][df]

;W[be]C[W1]MN[1]
;B[bd]C[B2]MN[2]
;W[ab]C[W3]MN[3]
;B[ca]C[B4]MN[4]
;W[da]C[W5]MN[5]

;
)
