(;GM[1]FF[4]SZ[19]
GN[Example 5c: Reversal]
PC[https://senseis.xmp.net/?Corridor]AP[GoWiki:2009]
DT[2019-12-25]
C[Diagram from https://senseis.xmp.net/?Corridor

Example 5c: Reversal]
PL[B]

AB[ei][fi][gi][hi][ji][ki][li][mi][ek][fk][gk][hk][jk][kk][lk][mk]
AW[di][ii][ni][dj][ij][nj][dk][ik][nk]

;B[ej]C[B1]MN[1]
;W[hj]C[W2]MN[2]
;B[gj]C[B3]MN[3]
;W[mj]C[W4]MN[4]

;
)
