(;GM[1]FF[4]SZ[19]
GN[Proof 3]
PC[https://senseis.xmp.net/?BeginnerExercise73/Solution]AP[GoWiki:2009]
DT[2024-09-04]
C[Diagram from https://senseis.xmp.net/?BeginnerExercise73/Solution

Proof 3]
PL[B]

AB[nq][oq][pq][qq][qr][rr][rs]
AW[ro][mp][np][op][pp][qp][mq][rq][mr][sr]

;B[ps]C[B1]MN[1]
;W[nr]C[W2]MN[2]
;B[or]C[B3]MN[3]

;
)
