(;GM[1]FF[4]SZ[19]
GN[[Tderz\]: avoid snapback like this - bingo! Opponent's keypoint is your own.]
PC[http://senseis.xmp.net/?RTGProblem29/Attempts]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?RTGProblem29/Attempts

[Tderz\]: avoid snapback like this - bingo! Opponent's keypoint is your own.]
PL[W]

AB[ca][da][db][fb][gb][ib][dc][ic][cd][gd][hd][jd][ce][de][ee][fe]
AW[ba][ab][cb][hb][kb][cc][fc][gc][hc][lc][bd][dd][ed][fd][ld][be]

;W[ha]C[W1]MN[1]
;B[ea]C[B2]MN[2]

;
)
