Problem 2577 goproblems.com


Author	unkx80	Created	2003-06-12
Difficulty	4 kyu (history)	Source	N/A
AVG solve time	27 sec	Stars	4.06 (16 votes)
User attempts	2964 / 7485	Collections	Counting Points, Instruction Required
Genre	endgame	Your attempts	N/A
Similar problems
Created	2003-06-12
Source	N/A
Stars	4.06 (16 votes)
Collections	Counting Points, Instruction Required
Your attempts	N/A

(;SZ[19]AB[sa]AB[sb]AB[qa]AB[pb]AB[ob]AB[nb]AB[na]AB[qc]AB[rc]AW[sc]AW[sd]AW[rd]AW[qd]AW[pd]AW[oc]AW[nc]AW[mc]AW[mb]C[How many points does black have in the corner?FORCE]LB[nf:4.0]LB[pf:4.5]LB[rf:5.0]AW[ma]FF[1]GM[1]AP[Jago:Version 4.53]GN[goproblem2577] (;W[rf]C[]AB[ma]AB[mb]AB[mc]AB[nc]AB[oc]AB[pd]AB[qd]AB[rd]AB[sd]AB[sc]AW[na]AW[nb]AW[ob]AW[pb]AW[qa]AW[qc]AW[rc]AW[sb]AW[sa];B[pc]C[So we swap color and Black takes the outside liberty. Do you need to defend or can you tenuki at T (Q14?)FORCE]LB[rf:5]LB[pf:T] (;W[pf];B[rb] (;W[qb];B[ra];W[sb]C[Correct! Snapback and 5 points in the corner.RIGHT]) (;W[ra];B[qb])) (;W[rb]C[Just 4 points now.]) (;W[qb]C[Just 4.]) (;W[ra]C[That's 4 points.]) (;W[pa];B[rb]C[Whoops.]) (;W[oa];B[rb]C[Yay!])) (;W[pf];B[qf]C[So... reduce Black to less than 5 points.]LB[pf:4.5] (;W[pc];B[rf]C[Black tenukies...] (;W[rb];B[qb] (;W[ra];B[sb] (;W[sa];B[sb]C[5 points to black both sides captured 3 stones.]) (;W[pa];B[sa]C[5 points to black both sides captured 3 stones.]) (;W[oa];B[sa]C[5 points to Black, both sides captured 3 stones.])) (;W[pa];B[ra]C[5 points to Black.]) (;W[oa];B[ra]C[5 points for Black.])) (;W[pa];B[rb]C[Black gets 5 points.]) (;W[oa];B[rb]C[5 points after all.]) (;W[qb];B[rb]C[Oho. 5 points.]) (;W[ra];B[rb]C[Gee. 5 points.])) (;W[rb];B[qb]C[] (;W[pc];B[rf]C[Black tenukies!] (;W[ra];B[sb] (;W[sa];B[sb]C[5 points to black both sides captured 3 stones.]) (;W[pa];B[sa]C[5 points to black both sides captured 3 stones.]) (;W[oa];B[sa]C[5 points to Black, both sides captured 3 stones.])) (;W[pa];B[ra]C[5 points to Black.]) (;W[oa];B[ra]C[5 points for Black.])) (;W[ra];B[sb]C[Snapback. Black gets 5 points of territory, both sides captured 2 stones.]) (;W[pa];B[rf]C[Black tenukies...] (;W[ra];B[sb] (;W[sa];B[sb]C[5 points.]) (;W[pc];B[sa]C[5 points to black both sides captured 3 stones.])) (;W[pc];B[ra]C[5 points to Black.])) (;W[oa];B[rf]C[Black tenukies...] (;W[ra];B[sb] (;W[sa];B[sb]C[5 points.]) (;W[pc];B[sa]C[5 points to Black, both sides captured 3 stones.])) (;W[pc];B[ra]C[5 points for Black.]))) (;W[pa];B[rb]) (;W[oa];B[pc]C[6 points!]) (;W[qb];B[pc]C[Whoops.]) (;W[ra];B[rb]C[5 points.])) (;W[nf]C[No, Black has more than 4 points. Try again.]))