(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[6.50]TM[3600]OT[5x30 byo-yomi]
GN[Czech go champ. Timko 3D(W) x Prokop 6D(B)]PW[Michal Timko]PB[Jan Prokop]WR[3d]BR[6d]DT[2021-07-05]EV[Czech go championship 2021]RO[6]PC[The KGS Go Server at http://www.gokgs.com/]
;B[cp]
;W[pd]
;B[pq]
;W[cd]
;B[qf]
;W[nc]
;B[pn]
;W[eq]
;B[hq]
;W[do]
;B[dp]
;W[ep]
;B[eo]
;W[co]
;B[bo]
;W[bn]
;B[bp]
;W[fo]
;B[en]
;W[dm]
;B[dr]
;W[er]
;B[dq]
;W[gp]
;B[em]
;W[dl]
;B[el]
;W[dk]
;B[jp]
;W[hn]
;B[hl]
;W[jn]
;B[hp]
;W[ho]
;B[fj]
;W[di]
;B[jl]
;W[kp]
;B[kq]
;W[lp]
;B[jo]
;W[kn]
;B[lq]
;W[ll]
;B[qd]
;W[qc]
;B[rc]
(;W[pc])
(;W[qe]
;B[rd]
;W[pe]
;B[re]
;W[qb]
;B[qh]C[MR2 [?\]: sry touchpad problem
]
(;W[ql])
(;W[mp]
;B[mq]
;W[nm]
;B[ed]
;W[df]
;B[cc]
;W[bc]
;B[ic]
;W[fh]
;B[hi]
;W[ql]
;B[qn]
;W[qj]
;B[dc]
;W[bb]
;B[np]
;W[no]
;B[oo]
;W[op]
;B[nq]
;W[kc]
;B[kb]
;W[jb]
;B[jc]
;W[lb]
;B[kd]
;W[lc]
;B[ib]
;W[hg]
;B[ff]
;W[fg]
;B[ef]
;W[dg]
;B[kj]
;W[nn]
;B[bm]
;W[cn]
;B[an]
;W[bl]
;B[pf]
;W[br]
;B[bs]C[to1al [1k?\]: by melo jit zabit ne? nebo tam je ko?
]
;W[cr]
;B[cs]
;W[bq]
;B[al]
;W[bk]
;B[ak]
;W[aj]
;B[am]C[to1al [1k?\]: a5
liusasori [5d\]: a5 seems to be a msitake
liusasori [5d\]: a5 a4 c7 a5 b10 a2 b alive
liusasori [5d\]: so w has to leave b10 if he want to kill
liusasori [5d\]: while c7 a5 b10 is a ko
patience [4d\]: b would still be alive even if w got a2, it's not a dead shape
to1al [1k?\]: thx
liusasori [5d\]: but w won't play a2 but a1 a2 a3 d1 a1 then it's a ko
liusasori [5d\]: but not an easy to win
liusasori [5d\]: w would need to win this ko 3 times which is almost impossible
]
;W[cm]
;B[ao]
;W[bj]
;B[gr]
;W[es]
;B[ds]
;W[ne]C[liusasori [5d\]: g2 was nice
liusasori [5d\]: now b can answer a1 with a3 and b is alive
]
;B[ja]
;W[he]
;B[if]
;W[gf]
;B[gd]
;W[rm]
;B[rn]
;W[ri]
;B[rh]
;W[ea]
;B[db]
;W[da]
;B[ca]
;W[cb]
;B[fa]
;W[ba]
;B[eb]C[patience [4d\]: yes, it seems like he had to play a5 after all, he didn't need a1 to start the ko, he could have done a3
]
;W[dd]
;B[ca]
;W[jh]C[liusasori [5d\]: but a5 throw in sequence would leave a choice between a3 ko and b10
liusasori [5d\]: and it's not a good idea to start a ko with such a local ko threat factory 
patience [4d\]: i think it's more a matter of black needing another move to defend, where as now he is alive but w can still try for seki
liusasori [5d\]: it is seki already
]
;B[ji]C[patience [4d\]: he was never going to just kill it
]
;W[hm]C[liusasori [5d\]: if b add any move first he dies in ko
]
;B[gl]C[patience [4d\]: but if w had started with a5 b would need another move, right now he's simply alive
liusasori [5d\]: yes
]
;W[on]
;B[po]
;W[sn]
;B[so]
;W[sm]C[liusasori [5d\]: the original mistake was b2 which was too early
liusasori [5d\]: w should have played g2 yose first
]
;B[ro]
;W[mj]
;B[kh]
;W[ih]C[liusasori [5d\]: but i don't understand your point patience, as b ended also in gote here: he played d1 and w took sente
]
;B[kg]
;W[li]C[patience [4d\]: b took his sente to play g2 gote
patience [4d\]: which would not have been my move
]
;B[ki]
;W[rk]
;B[oi]
;W[pi]
;B[ph]
;W[oj]
;B[ni]
;W[nj]
;B[rb]C[liusasori [5d\]: then with a5 b would end up alive in the corner and gote, and with other sequence its a seki in corner and b got g2 gote
]
;W[ra]
;B[la]
;W[mb]
;B[qi]
;W[pj]
;B[si]
;W[rj]
;B[pm]
;W[pl]
;B[ko]
;W[lo]
;B[ln]
;W[mo]C[liusasori [5d\]: a5 would give 10 points to b in the corner and if w got g2 it's something like 7 points difference so in the end a5 would be a -3 points sente move but probably w could get more than g2, something like h1 or so
liusasori [5d\]: so in the end it's only  or  points difference
liusasori [5d\]: 1 or 2
]
;B[lk]
;W[ml]
;B[km]
;W[jm]
;B[kl]
;W[lm]
;B[ng]C[patience [4d\]: anyway i could b with a comfortable lead
patience [4d\]: count*
]
;W[io]
;B[ip]
;W[il]
;B[ik]
;W[im]
;B[ii]C[MR2 [?\]: B+ resign
])))
