Problem	1699
Created	2002-11-08
Name	Chapter 4 Problem 1
Source	James Davies, Tesuji
Rating

Difficulty	4.5 kyu
Average Solve Time	34 secs
User Attempts	3178 / 9439
Solve Ratio Rating	5 kyu
	rating history

Sometimes it is good to know how to get a KO going, especially if you have enough Ko threats.
Here you may assume, that you have a KO threat at A.

(; AW[ra][pb][qb][pc][pd][rd][qe][qf][qi]AB[ob][rb][sb][oc][qc][rc][qd][oe][pe]LB[oh:A]PL[W] (;W[se]LB[oh:A] ;B[od]LB[oh:A] ;W[sc]LB[oh:A] ;B[sd]LB[oh:A] ;W[oh]CR[oh]C[RIGHT White wins the corner if she has enough KO threats]) (;W[sd]LB[oh:A] ;B[re]LB[oh:A] ;W[rf]LB[oh:A] ;B[od]LB[oh:A] ;W[se]LB[oh:A] ;B[pa]LB[oh:A]) (;W[sa]LB[oh:A]CR[sa] ;B[qa]LB[oh:A]CR[qa] ;W[pa]LB[oh:A]CR[pa] ;B[od]LB[oh:A]CR[od] ;W[ra]LB[oh:A]CR[ra] ;B[oa]LB[oh:A]CR[oa]) (;W[sc]LB[oh:A]CR[sc] ;B[sd]LB[oh:A]CR[sd] ;W[re]LB[oh:A]CR[re] ;B[od]LB[oh:A]CR[od] ;W[se]LB[oh:A]CR[se] ;B[pa]LB[oh:A]CR[pa]) (;W[re]LB[oh:A]CR[re] ;B[od]LB[oh:A]CR[od] ;W[sc]LB[oh:A]CR[sc] ;B[sd]LB[oh:A]CR[sd] ;W[se]LB[oh:A]CR[se] ;B[pa]LB[oh:A]CR[pa])))