(;GM[1]FF[4]SZ[19]
GN[White to Move - Does the ladder work?]
PC[http://senseis.xmp.net/?Ladder/ReadingTechniques]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?Ladder/ReadingTechniques

White to Move - Does the ladder work?]
PL[W]

AB[db][dc][gc][jc][mc][ed][ee][ef][dg][dh][eh][fh][bi][ci][dj][ej][ck][om][cn][do][fo][go][cp][ep][rp][cq][dq][fq][nq][oq][pq][rq][cr][fr][bs][es][fs]
AW[cb][cc][oc][dd][qd][de][ne][cf][df][cg][eg][qg][ch][di][ei][bj][cj][qj][bk][rm][qn][sn][ro][fp][gp][qp][gq][jq][mq][qq][br][gr][as]

;W[fi]C[W1]MN[1]
;B[gi]C[B2]MN[2]

;
)
