invalid problem set
Previous
Next
life and death
flag problem... (4) Well Constructed Needs Fixing (4) Invalid Duplicate
-4
Next
Problem 20703
Created 2015-12-20
Name Snapbacks (uttegaeshi)
Source Commented bestiary
Rating
Difficulty 9 dan
Average Solve Time 67 secs
User Attempts
1 / 57
Solve Ratio Rating 6 dan
rating history
(from the Hatsuyoron, which may explain why it's not really a life and death problem) displays the theme in an expanded version, but it becomes then almost impossible to solve without putting stones on the board, especially because of the many intentional wrong tracks, and of the hidden last "slow" tesuji. The strongest White resistance in fact ends in a (very) indirect ko, but in a real game this resistance, endangering the whole group, would certainly not be White's best choice...
(;SZ[19]AW[ia]AW[pa]AW[hb]AW[jb]AW[ob]AW[hc]AW[jc]AW[kc]AW[lc]AW[mc]AW[oc]AW[he]AW[je]AW[hf]AW[lf]AW[nf]AW[og]AB[ib]AB[pb]AB[rb]AB[ec]AB[ic]AB[pc]AB[cd]AB[id]AB[jd]AB[kd]AB[ld]AB[md]AB[pd]AB[ge]AB[qf]C[Black to play and save the marked stones]TR[ib]TR[ic]TR[id]TR[jd]TR[kd]TR[ld]TR[md]GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]RU[Japanese]KM[0.00]KK[^Bestiary^Hatsuyoron^Snapback];B[hd];W[gd];B[gc]C[the order of those preliminaries dont matter much];W[fd];B[nd];W[od];B[oe];W[ne]
(;B[nc];W[nb];B[fc];W[fe]C[all this is foced (of course, it is assumed there are no other stones on the board)];B[gb];W[ha];B[mb]C[la combinaison de base.]
(;W[ma];B[lb]
(;W[la];B[ja];W[ka];B[qa]C[un tesuji lent qui est la vraie clé (et la difficulté principale) de ce problème]
(;W[pe];B[ga];W[ja];B[na];W[kb];B[mb]C[RIGHT])
(;W[kb];B[mb];W[lb];B[ga];W[ja];B[oa];W[pe];B[pa];W[of];B[na]C[jeu de voleur élaboréRIGHT])
(;W[na];B[pe];W[ke];B[ga];W[ja];B[oa]C[un yoseko (ko indirect); mais blanc doit le gagner 3 foisRIGHT]))
(;W[kb];B[ga]C[blanc ne peut évidemment pas jouer dans ce sensRIGHT]))
(;W[lb]C[si blanc fait atari dans ce sens];B[ma];W[la];B[ja];W[ka];B[ga]C[cette combinaison est une autre sorte de jeu de voleur, connue sous le nom de batabata (ou tonton)RIGHT]))
(;B[fe]
(;W[fc];B[gb];W[ha];B[fb]C[this looks simpler....RIGHT])
(;W[ed];B[ee];W[dd];B[gb];W[ha];B[dc];W[de];B[df];W[ce];B[cf];W[cc];B[bd];W[be];B[bc];W[bf];B[bg];W[ef];B[ff];W[eg]C[but is actually a wrong track])))
Toggle next/previous buttons