(;GM[1]FF[4]SZ[19]
GN[Seki]
PC[http://senseis.xmp.net/?BeginnerExercise134/Solution]AP[GoWiki:2009]
DT[2014-07-13]
C[Diagram from http://senseis.xmp.net/?BeginnerExercise134/Solution

Seki]
PL[B]

AB[re][pf][qf][sf][pg][rg][oh][oi][pj][rj][pk][sk][pl][qm][qn][sn][po][ro][so]
AW[qg][sg][ph][qh][rh][pi][ri][si][qj][qk][ql][rl][sl][rm][sm][rn]

;B[rf]C[B1]MN[1]
;W[sj]C[W2]MN[2]
;B[sh]C[B3]MN[3]
;W[rk]C[W4]MN[4]

;
)
