(;GM[1]FF[4]SZ[19]
GN[Trap (4 at 1)]
PC[http://senseis.xmp.net/?BeginnerExercise144/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?BeginnerExercise144/Solution

Trap (4 at 1)]
PL[W]

AB[db][dc][hc][cd][de][df][ff][hf][eg]
AW[bb][fb][cc][ec][gc][ic][bd][fd][hd][be][cf][cg][dg]
LB[ef:a]

;W[dd]C[W1]MN[1]
;B[ed]C[B2]MN[2]
;W[ee]C[W3]MN[3]
;B[dd]C[B4]MN[4]

;LB[ef:a]
)
