(;GM[1]FF[4]SZ[19]
GN[The question (problem 142) is: How should Black play after exchanging 1 for White 2?]
PC[http://senseis.xmp.net/?GSATEProblem142]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?GSATEProblem142

The question (problem 142) is: How should Black play after exchanging 1 for White 2?]
PL[B]

AB[nb][pb][oc][od][oe][of][pf][qf][rf][mg][ng][rg][sg]
AW[mb][qb][ic][mc][nc][qc][jd][nd][pd][sd][ne][pe][qe][re][kf][lf][nf][sf]

;B[ma]C[B1]MN[1]
;W[la]C[W2]MN[2]

;
)
