(;GM[1]FF[4]SZ[19]
GN[B1 gains a liberty]
PC[http://senseis.xmp.net/?DescentTesuji]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?DescentTesuji

B1 gains a liberty]
PL[B]

AB[bb][cb][dc][cd][dd][bf][cf][ef]
AW[db][eb][bc][cc][ec][bd][be]

;B[ab]C[B1]MN[1]

;
)
