(;GM[1]FF[4]SZ[19]
GN[straight four]
PC[https://senseis.xmp.net/?BeginnerExercise20/Solution]AP[GoWiki:2009]
DT[2024-08-26]
C[Diagram from https://senseis.xmp.net/?BeginnerExercise20/Solution

straight four]
PL[W]

AB[ea][ab][bb][db][eb][cc]
AW[fa][fb][bc][ec][fc][bd][cd][dd]
LB[ba:a][ca:b]

;W[dc]C[W1]MN[1]
;B[cb]C[B2]MN[2]

;LB[ba:a][ca:b]
)
