(;GM[1]FF[4]SZ[19]
GN[move "a" above occurs when ...]
PC[http://senseis.xmp.net/?Nachtrabe/OldBadukBlog]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?Nachtrabe/OldBadukBlog

move "a" above occurs when ...]
PL[W]

AB[pk][no][np][pp]
AW[qn][mp][nq]
CR[np]

;W[pq]C[W1]MN[1]
;B[oq]C[B2]MN[2]
;W[or]C[W3]MN[3]
;B[op]C[B4]MN[4]
;W[mr]C[W5]MN[5]
;B[qq]C[B6]MN[6]
;W[pr]C[W7]MN[7]
;B[mo]C[B8]MN[8]
;W[lp]C[W9]MN[9]

;CR[np]
)
