( ; AB [lr][mr][nr][or][pq][qq] AW [kq][kr][mp][op][oq][pp][qp][rp][rn] C [White to play.] (; W [rr]; B [qr] (; W [ps]; B [rq] (; W [sq]; B [qs] (; W [os]; B [pr] (; W [sp] C [RIGHT][Correct, but leaves extra ko threats.])(; W [sr] C [RIGHT][Correct, but leaves extra ko threats.]))(; W [ls]; B [pr] (; W [sp] C [RIGHT][Correct, but leaves extra ko threats.])(; W [sr] C [RIGHT][Perfect!]))(; W [sp]; B [os])(; W [sr]; B [os])(; W [rs]; B [pr]))(; W [qs]; B [sr]))(; W [rq]; B [ps])(; W [qs]; B [rs] (; W [ss]; B [ps] C [Ko for life. You could have killed unconditionally.])(; W [ps]; B [rq] (; W [sq]; B [sr])(; W [sr]; B [sq]))(; W [rq]; B [ps]))) (; W [qr]; B [rr] C [Miai.] TR [rq][pr]) (; W [rq]; B [qr] C [Miai.] TR [ps][rr]) (; W [ls]; B [ps] C [Miai.] TR [ms][ns] SQ [qr][rr]) (; W [ps]; B [rr]) )