invalid problem set
Problem | 1998 |
Created | 2003-03-10 |
Source | KGS: adum vs bigx |
Rating | |
Difficulty | 8 dan |
Average Solve Time | 40 secs |
User Attempts |
182 / 2311 |
Solve Ratio Rating | 4 dan |
| rating history |
thanks for daniel for finding the refutation to the original problem.
(;GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2]
RU[Japanese]SZ[19]KM[0.00]
PW[White]PB[Black]AW[el][gl][dm][em][gm][dn][hn][in][jn][kn][ln][co][ho][jo][lo][mo][cp][fp][gp][jp][mp][np][cq][kq][nq][oq][br][cr][er][fr][gr][hr][ir][or][bs][ns][os]AB[en][fn][gn][do][eo][go][io][ko][dp][hp][ip][kp][lp][dq][iq][jq][mq][dr][kr][mr][nr][cs][ds][es][fs][gs][hs][is][js][ms]LB[kq:1]C[white just played at 1. what is black's best option?]PL[B]
(;B[lq]CR[lq]
;W[jr]CR[jr]
(;B[kq]CR[kq]
;W[ls]CR[ls]
(;B[ks]CR[ks]
;W[hq]CR[hq]
(;B[fq]CR[fq]
;W[eq]CR[eq]
(;B[ep]CR[ep]
;W[gq]CR[gq]
;B[fo]CR[fo]C[RIGHT])
(;B[fo]CR[fo]
;W[fm]CR[fm]))
(;B[eq]CR[eq]
;W[fq]CR[fq]C[seki])
(;B[ep]CR[ep]
;W[fq]CR[fq]C[seki]))
(;B[fq]CR[fq]
;W[ks]CR[ks]
(;B[gq]CR[gq]
;W[eq]CR[eq])
(;B[eq]CR[eq]
;W[gq]CR[gq])
(;B[hq]CR[hq]
;W[gq]CR[gq]
;B[lr]CR[lr]
;W[ks]CR[ks]))
(;B[gq]CR[gq]
;W[fq]CR[fq]
;B[hq]CR[hq]
;W[ks]CR[ks])
(;B[lr]CR[lr]
;W[hq]CR[hq]
;B[ks]CR[ks]
;W[fq]CR[fq])
(;B[eq]CR[eq]
;W[ks]CR[ks]
(;B[fq]CR[fq]
;W[gq]CR[gq])
(;B[gq]CR[gq]
;W[fq]CR[fq])))
(;B[ks]CR[ks]
;W[hq]CR[hq]
;B[kq]CR[kq]
;W[fq]CR[fq]C[seki])
(;B[lr]CR[lr]
;W[hq]CR[hq]
;B[kq]CR[kq]
;W[ks]CR[ks])
(;B[ls]CR[ls]
;W[hq]CR[hq]
;B[kq]CR[kq]
;W[fq]CR[fq]C[seki])
(;B[eq]CR[eq]
;W[hq]CR[hq]
;B[kq]CR[kq]
;W[fq]CR[fq]C[seki])
(;B[hq]CR[hq]
;W[gq]CR[gq]
;B[kq]CR[kq]
;W[eq]CR[eq]C[seki]))
(;B[jr]CR[jr]
;W[lq]CR[lq]C[black has already lost too much. he can do better])
(;B[lr]CR[lr]
;W[lq]CR[lq])
(;B[ls]CR[ls]
;W[lq]CR[lq])
(;B[fq]CR[fq]
;W[lq]CR[lq])
(;B[gq]CR[gq]
;W[lq]CR[lq]))
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