Problem	9709
Created	2007-01-26
Source	Yilun Yang problem set #4
Rating

Difficulty	8 dan
Average Solve Time	82 secs
User Attempts	80 / 876
Solve Ratio Rating	3 dan
	rating history

This was one of the easier questions that the 5k and above group was assigned at Yilun Yang's 2007 Evanston workshop.

(;AB[cr]AB[cq]AB[cp]AB[co]AB[dn]AB[fn]AB[ep]AB[dp]AB[fp]AB[gp]AB[gq]AB[es]AW[dr]AW[dq]AW[eq]AW[cs]AW[br]AW[bq]AW[bp]AW[bo]AW[cm]AW[dm]AW[fm]AW[gm]AW[ho]AW[hp]AW[hq]AW[hr]C[Black to live.]AP[goproblems] (;B[ds] (;W[fs]C[CHOICE] (;B[bs];W[er] (;B[fr];W[cs] (;B[fq];W[gs];B[es]C[RIGHT]) (;B[ds];W[gs]) (;B[gs];W[ds])) (;B[cs];W[fr]) (;B[gs];W[cs] (;B[ds];W[gr]) (;B[fr];W[ds])) (;B[fq];W[cs] (;B[ds];W[fr]) (;B[fr];W[as];B[ds];W[es];B[gs]C[RIGHT]) (;B[gs];W[ds]))) (;B[fr];W[er];B[gs];W[ds])) (;W[er];B[bs] (;W[fs]C[This line transposes to the solution path.] (;B[fr];W[cs] (;B[fq];W[gs];B[es]C[RIGHT]) (;B[ds];W[gs]) (;B[gs];W[ds])) (;B[cs];W[fr]) (;B[gs];W[cs] (;B[ds];W[gr]) (;B[fr];W[ds])) (;B[fq];W[cs] (;B[ds];W[fr]) (;B[fr];W[as];B[ds];W[es];B[gs]C[RIGHT]) (;B[gs];W[ds]))) (;W[fr];B[gr];W[fs];B[gs];W[cs];B[fq];W[as];B[ds]))) (;B[eo]C[NOTTHIS]) (;B[er];W[ds];B[fq];W[bs];B[gr];W[gs]))