invalid problem set
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life and death
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Problem | 17955 |
Created | 2014-11-04 |
Source | IGS Game |
Rating | |
Difficulty | 18.3 kyu |
Average Solve Time | 49 secs |
User Attempts |
1451 / 3181 |
Solve Ratio Rating | 8 kyu |
| rating history |
How can black defend against white's invasion? --- This is a local problem. What you see is what you get for ko threats, etc.
(;AB[is]AB[ir]AB[iq]AB[jq]AB[jp]AB[lp]AB[mp]AB[mq]AB[mr]AB[ls]AW[ns]AW[ms]AW[nr]AW[nq]AW[np]AW[no]AW[hs]AW[hr]AW[hq]AW[gq]AW[ip]AW[io]AW[jn]AW[kn]AB[hp]AW[lr]TR[lr]AB[go]AW[hn]AP[goproblems]
(;B[kr];W[ks]
(;B[js];W[ls]
(;B[lq];W[kp];B[ko]C[RIGHT])
(;B[kp];W[lq])
(;B[ko];W[kq]))
(;B[lq];W[ls]
(;B[js];W[kp];B[ko]C[RIGHT])
(;B[kp];W[js])
(;B[ko];W[js]))
(;B[kq];W[js])
(;B[jr];W[lq])
(;B[kp];W[lq])
(;B[ko];W[kq]))
(;B[ks];W[kr];B[js];W[kq]
(;B[kp];W[lq])
(;B[ko];W[lq])
(;B[lq];W[jr];B[kp];W[kr])
(;B[jr];W[lq]))
(;B[lq];W[kr])
(;B[kp];W[kr])
(;B[kq];W[kr])
(;B[js];W[kr];B[ks];W[kq]
(;B[kp];W[lq])
(;B[ko];W[lq])
(;B[lq];W[jr];B[kp];W[kr])
(;B[jr];W[lq]))
(;B[jr];W[kr])
(;B[ko];W[kr])
(;B[jo];W[kr])
(;B[lo];W[ln]))
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