(;GM[1]FF[4]SZ[22:19]
GN[Black plays first]
PC[http://senseis.xmp.net/?CorridorInfinitesimals]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?CorridorInfinitesimals

Black plays first]
PL[B]

AB[ai][bi][ci][di][ei][ki][si][aj][kj][nj][pj][sj][uj][ak][bk][ck][dk][ek][kk][sk]
AW[fi][li][mi][ni][oi][pi][qi][ri][ti][ui][vi][bj][fj][oj][vj][fk][lk][mk][nk][ok][pk][qk][rk][tk][uk][vk]

;B[lj]C[B1]MN[1]
;W[ej]C[W2]MN[2]
;B[rj]C[B3]MN[3]
;W[dj]C[W4]MN[4]

;
)
