I know it's not the convention, but a 9x9 game review may be exactly what I need and it's not so much trouble for the reviewer because it's fast. I remember playing a lot of 9x9 games when I was starting and it really helped me improve my reading a little bit. I'm sure that's what I need now. So, please review. I will be most grateful. Thanks in advance.
BTW, I played white. I decided to start and early fight. I tried to separate all blacks groups, in order to, in the end, be able to capture at least one of them.
;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2] RU[Japanese]SZ[9]KM[6.50]TM[900]OT[5x15 byo-yomi] PW[Menezes]PB[GnuBot]WR[6k]DT[2011-05-08]PC[The KGS Go Server at http://www.gokgs.com/]C[GnuBot [-]: GTP Engine for GnuBot (black): GNU Go version 3.8 ]RE[W+8.50] ;B[fd]BL[899.675] ;W[df]WL[894.797] ;B[ef]BL[899.357] ;W[ee]WL[892.651] ;B[cd]BL[897.202] ;W[fe]WL[890.311] ;B[eg]BL[893.187] ;W[dd]WL[887.631]C[Here my objective was to separate the three groups. I figured that one of them had to die in the end!] ;B[cc]BL[888.155] ;W[dc]WL[885.091] ;B[gd]BL[876.981] ;W[ce]WL[876.064] ;B[hg]BL[864.306] ;W[ge]WL[870.531] ;B[be]BL[844.97] ;W[bf]WL[866.847] ;B[bc]BL[820.114] ;W[gg]WL[859.062] ;B[gh]BL[801.589] ;W[fg]WL[848.801] ;B[fh]BL[768.972] ;W[dg]WL[841.35] ;B[dh]BL[742.137] ;W[hf]WL[833.72] ;B[hh]BL[707.511] ;W[ff]WL[820.879]C[I thought this would be sente... I see now that I should have attacked the top directly... ] ;B[fb]BL[693.772] ;W[hc]WL[811.391] ;B[hd]BL[658.282] ;W[hb]WL[772.035] ;B[db]BL[624.029] ;W[cb]WL[767.896] ;B[ec]BL[576.278] ;W[bb]WL[740.191] ;B[ab]BL[556.961] ;W[da]WL[723.195] ;B[eb]BL[519.453] ;W[ba]WL[695.479] ;B[af]BL[514.865] ;W[ad]WL[680.07] ;B[ac]BL[507.828] ;W[ag]WL[666.334] ;B[bd]BL[503.909] ;W[ae]WL[662.18] ;B[af]BL[500.479] ;W[ae]WL[661.233] ;B[ed]BL[497.261] ;W[de]WL[655.879] ;B[ea]BL[494.983] ;W[af]WL[634.175] ;B[ca]BL[486.872]C[There was probably a better result than a ko, I don't know... But the ko wasn't so bad actually, because now I can attack the bottom group, or win the ko. ] ;W[eh]WL[629.789] ;B[ei]BL[485.435]C[Is black really dead here if he doesn't respond?] ;W[da]WL[626.705] ;B[gb]BL[478.711] ;W[ad]WL[621.642] ;B[ch]BL[475.52] ;W[ig]WL[601.431] ;B[eg]BL[471.197] ;W[ih]WL[596.969] ;B[ib]BL[468.656]C[I missed something, didn't I? Could I have made a seki or something? ] ;W[bh]WL[585.211] ;B[ci]BL[467.785] ;W[cg]WL[581.154] ;B[bi]BL[467.024] ;W[ah]WL[575.755] ;B[hi]BL[466.382] ;W[if]WL[570.834] ;B[he]BL[465.513]C[Lost one point here... Not good in endgame either...] ;W[ie]WL[565.469] ;B[id]BL[464.323] ;W[gf]WL[561.117] ;B[ca]BL[463.621] ;W[aa]WL[559.467] ;B[da]BL[463.087] ;W[]WL[559.465] ;B[eh]BL[462.618] ;W[ef]WL[558.164] ;B[ai]BL[462.161] ;W[]WL[558.163] ;B[ii]BL[461.69] ;W[]WL[558.163] ;B[]BL[461.69]TW[ab][ac][bc][cc][bd][cd][be][cf][bg]TB[fa][ga][ha][ia][hb][fc][gc][hc][ic][di][fi][gi])
Re: 9x9 game
Posted: Mon May 09, 2011 9:03 am
by Joaz Banbeck
Sometime around move 19 you should be playing A5, I think. As a general rule, you should do it while it is sente.
Move 25 at H6 is lethal. Playing F4 is small and gote. Besides, if you have adopted a plan of killing something, stick with it. Make your eyes by killing something.
Note the similarity between the two above mentioned moves. Play along the side like this can be bigger that one's intuition suggests.
Re: 9x9 game
Posted: Mon May 09, 2011 9:19 am
by blade90
Move 53: If Black plays elsewhere then the White hane at F1 kills Black.
EDIT: Here are some thoughts about 56 Move 56: Winning the ko here is not the biggest move I think. White can close the game without worrying about Black to pull something unexpected of.
The diagram shows an alternativ to White 56 (as 2):
$$B Moves 1 to 10 $$ ------------------- $$ | . O 9 O X . . . . | $$ | X O O X X X 1 O . | $$ | X X X O X . . O . | $$ | . X X O X X X X . | $$ | O X O O O O O . . | $$ | O O . O . O . O 8 | $$ | O . . O 5 O O X 6 | $$ | . . 2 X O X X X 7 | $$ | . . 4 3 X . 0 . . | $$ -------------------
[go]$$B Moves 1 to 10 $$ ------------------- $$ | . O 9 O X . . . . | $$ | X O O X X X 1 O . | $$ | X X X O X . . O . | $$ | . X X O X X X X . | $$ | O X O O O O O . . | $$ | O O . O . O . O 8 | $$ | O . . O 5 O O X 6 | $$ | . . 2 X O X X X 7 | $$ | . . 4 3 X . 0 . . | $$ -------------------[/go]
These are all forcing moves, if Black omits even 1 move his group dies. Then...
$$B $$ ------------------- $$ | . O X 2 X . . . . | $$ | X O O X X X X O . | $$ | X X X O X . . O . | $$ | . X X O X X X X . | $$ | O X O O O O O . . | $$ | O O . O . O . O O | $$ | O . 3 O X O O X O | $$ | . 4 O X . X X X X | $$ | . . O X X . O 1 . | $$ -------------------
[go]$$B $$ ------------------- $$ | . O X 2 X . . . . | $$ | X O O X X X X O . | $$ | X X X O X . . O . | $$ | . X X O X X X X . | $$ | O X O O O O O . . | $$ | O O . O . O . O O | $$ | O . 3 O X O O X O | $$ | . 4 O X . X X X X | $$ | . . O X X . O 1 . | $$ -------------------[/go]
$$B $$ ------------------- $$ | 7 O 5 O X . . 8 . | $$ | X O O X X X X O . | $$ | X X X O X . . O . | $$ | . X X O X X X X 6 | $$ | O X O O O O O . . | $$ | O O . O . O . O O | $$ | O . X O X O O X O | $$ | . O O X . X X X X | $$ | . . O X X . O X . | $$ -------------------
[go]$$B $$ ------------------- $$ | 7 O 5 O X . . 8 . | $$ | X O O X X X X O . | $$ | X X X O X . . O . | $$ | . X X O X X X X 6 | $$ | O X O O O O O . . | $$ | O O . O . O . O O | $$ | O . X O X O O X O | $$ | . O O X . X X X X | $$ | . . O X X . O X . | $$ -------------------[/go]
6 connects the White groups and with 7 Black can win the ko but after 8 Black already lost that game by about 4 1/2 points. With this kind of play white always stays ahead of Black and is forced to defend = White has sente.
Re: 9x9 game
Posted: Mon May 09, 2011 5:13 pm
by Menezes
blade90 wrote:Move 53: If Black plays elsewhere then the White hane at F1 kills Black.
EDIT: Here are some thoughts about 56 Move 56: Winning the ko here is not the biggest move I think. White can close the game without worrying about Black to pull something unexpected of.
The diagram shows an alternativ to White 56 (as 2):
$$B Moves 1 to 10 $$ ------------------- $$ | . O 9 O X . . . . | $$ | X O O X X X 1 O . | $$ | X X X O X . . O . | $$ | . X X O X X X X . | $$ | O X O O O O O . . | $$ | O O . O . O . O 8 | $$ | O . . O 5 O O X 6 | $$ | . . 2 X O X X X 7 | $$ | . . 4 3 X . 0 . . | $$ -------------------
[go]$$B Moves 1 to 10 $$ ------------------- $$ | . O 9 O X . . . . | $$ | X O O X X X 1 O . | $$ | X X X O X . . O . | $$ | . X X O X X X X . | $$ | O X O O O O O . . | $$ | O O . O . O . O 8 | $$ | O . . O 5 O O X 6 | $$ | . . 2 X O X X X 7 | $$ | . . 4 3 X . 0 . . | $$ -------------------[/go]
These are all forcing moves, if Black omits even 1 move his group dies. Then...
$$B $$ ------------------- $$ | . O X 2 X . . . . | $$ | X O O X X X X O . | $$ | X X X O X . . O . | $$ | . X X O X X X X . | $$ | O X O O O O O . . | $$ | O O . O . O . O O | $$ | O . 3 O X O O X O | $$ | . 4 O X . X X X X | $$ | . . O X X . O 1 . | $$ -------------------
[go]$$B $$ ------------------- $$ | . O X 2 X . . . . | $$ | X O O X X X X O . | $$ | X X X O X . . O . | $$ | . X X O X X X X . | $$ | O X O O O O O . . | $$ | O O . O . O . O O | $$ | O . 3 O X O O X O | $$ | . 4 O X . X X X X | $$ | . . O X X . O 1 . | $$ -------------------[/go]
$$B $$ ------------------- $$ | 7 O 5 O X . . 8 . | $$ | X O O X X X X O . | $$ | X X X O X . . O . | $$ | . X X O X X X X 6 | $$ | O X O O O O O . . | $$ | O O . O . O . O O | $$ | O . X O X O O X O | $$ | . O O X . X X X X | $$ | . . O X X . O X . | $$ -------------------
[go]$$B $$ ------------------- $$ | 7 O 5 O X . . 8 . | $$ | X O O X X X X O . | $$ | X X X O X . . O . | $$ | . X X O X X X X 6 | $$ | O X O O O O O . . | $$ | O O . O . O . O O | $$ | O . X O X O O X O | $$ | . O O X . X X X X | $$ | . . O X X . O X . | $$ -------------------[/go]
6 connects the White groups and with 7 Black can win the ko but after 8 Black already lost that game by about 4 1/2 points. With this kind of play white always stays ahead of Black and is forced to defend = White has sente.
But winning the ko W won the game by 8.5 points...
Joaz, you are right about F4. But I didn't play it for eyes... My poor reading made me think that it would be sente. Only after playing it I realized it wasn't.
But what about the top right? Was it possible to do something up there?
Re: 9x9 game
Posted: Tue May 10, 2011 2:43 am
by blade90
You are right, sorry^^.
Anyway I'm not sure about the top right corner I don't think white can force Black to 1 eye and White can't make 2 eyes. A seki is also not possible because white needs to fill out all outside libertys first.
I think Black 55 is enough to live and Black 61 is a wasted move. Of course 55 could be a wasted move too.
Re: 9x9 game
Posted: Tue May 10, 2011 8:27 am
by Menezes
Actually, Blade, I worked out some variations just now and figured some ways B dies. The variations are added at the end of the game, from move 60 on.
(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2] RU[Japanese]SZ[9]KM[6.50]TM[900]OT[5x15 byo-yomi] PW[Menezes]PB[GnuBot]WR[6k]DT[2011-05-08]PC[The KGS Go Server at http://www.gokgs.com/]C[GnuBot [-]: GTP Engine for GnuBot (black): GNU Go version 3.8 ]RE[W+8.50] ;B[fd]BL[899.675] ;W[df]WL[894.797] ;B[ef]BL[899.357] ;W[ee]WL[892.651] ;B[cd]BL[897.202] ;W[fe]WL[890.311] ;B[eg]BL[893.187] ;W[dd]WL[887.631]C[Here my objective was to separate the three groups. I figured that one of them had to die in the end!] ;B[cc]BL[888.155] ;W[dc]WL[885.091] ;B[gd]BL[876.981] ;W[ce]WL[876.064] ;B[hg]BL[864.306] ;W[ge]WL[870.531] ;B[be]BL[844.97] ;W[bf]WL[866.847] ;B[bc]BL[820.114] ;W[gg]WL[859.062] ;B[gh]BL[801.589] ;W[fg]WL[848.801] ;B[fh]BL[768.972] ;W[dg]WL[841.35] ;B[dh]BL[742.137] ;W[hf]WL[833.72] ;B[hh]BL[707.511] ;W[ff]WL[820.879]C[I thought this would be sente... I see now that I should have attacked the top directly... ] ;B[fb]BL[693.772] ;W[hc]WL[811.391] ;B[hd]BL[658.282] ;W[hb]WL[772.035] ;B[db]BL[624.029] ;W[cb]WL[767.896] ;B[ec]BL[576.278] ;W[bb]WL[740.191] ;B[ab]BL[556.961] ;W[da]WL[723.195] ;B[eb]BL[519.453] ;W[ba]WL[695.479] ;B[af]BL[514.865] ;W[ad]WL[680.07] ;B[ac]BL[507.828] ;W[ag]WL[666.334] ;B[bd]BL[503.909] ;W[ae]WL[662.18] ;B[af]BL[500.479] ;W[ae]WL[661.233] ;B[ed]BL[497.261] ;W[de]WL[655.879] ;B[ea]BL[494.983] ;W[af]WL[634.175] ;B[ca]BL[486.872]C[There was probably a better result than a ko, I don't know... But the ko wasn't so bad actually, because now I can attack the bottom group, or win the ko. ] ;W[eh]WL[629.789] ;B[ei]BL[485.435]C[Is black really dead here if he doesn't respond?] ;W[da]WL[626.705] ;B[gb]BL[478.711] ;W[ad]WL[621.642] ;B[ch]BL[475.52] ;W[ig]WL[601.431] ;B[eg]BL[471.197] (;W[ih]WL[596.969] ;B[ib]BL[468.656]C[I missed something, didn't I? Could I have made a seki or something? ] ;W[bh]WL[585.211] ;B[ci]BL[467.785] ;W[cg]WL[581.154] ;B[bi]BL[467.024] ;W[ah]WL[575.755] ;B[hi]BL[466.382] ;W[if]WL[570.834] ;B[he]BL[465.513]C[Lost one point here... Not good in endgame either...] ;W[ie]WL[565.469] ;B[id]BL[464.323] ;W[gf]WL[561.117] ;B[ca]BL[463.621] ;W[aa]WL[559.467] ;B[da]BL[463.087] ;W[]WL[559.465] ;B[eh]BL[462.618] ;W[ef]WL[558.164] ;B[ai]BL[462.161] ;W[]WL[558.163] ;B[ii]BL[461.69] ;W[]WL[558.163] ;B[]BL[461.69]TW[ab][ac][bc][cc][bd][cd][be][cf][bg]TB[fa][ga][ha][ia][hb][fc][gc][hc][ic][di][fi][gi]) (;W[ib] ;B[gc] (;W[ga] (;B[fa] (;W[ha] ;B[id] ;W[ie] ;B[ic] ;W[he] ;B[ia]) (;W[id] (;B[ha] ;W[he] ;B[ia] ;W[ga] ;B[ha] ;W[ic]C[B dies.]) (;B[ie] (;W[ha] ;B[he] ;W[if] ;B[ic]C[Ko. W has no threat.]) (;W[he] ;B[ic] ;W[if] ;B[ha] ;W[id]C[B dead.]) (;W[ic] ;B[he] ;W[if] ;B[ha]C[B lives.]) (;W[if] (;B[he]C[B dead...] (;W[ha]) (;W[fc])) (;B[ic] ;W[he] (;B[ha] ;W[id]) (;B[id]C[again, self atari...]))))) (;W[ic] ;B[ha] ;W[id] ;B[ie]C[That's just plain stupid...])) (;B[id] (;W[ie] (;B[ic] (;W[he] ;B[ha] ;W[ia] ;B[ha]) (;W[ha] (;B[ca] ;W[aa] ;B[fa]C[B lives.]) (;B[fa] ;W[he] ;B[ia]))) (;B[ha] ;W[ia] ;B[ic]C[B lives.])) (;W[ha] ;B[ic] ;W[ie] ;B[fa] ;W[he] ;B[ia]))) (;W[id] ;B[ie] ;W[he] ;B[ic] ;W[ga] (;B[fa] ;W[id]) (;B[id]) (;B[ha] ;W[id] ;B[fa] ;W[if]C[B dies.]))))
Re: 9x9 game
Posted: Tue May 10, 2011 6:11 pm
by blade90
Thanks! I looked at your variations but I think black needs to make a mistake to die. So it's not needed to defend, I think.
But it all doesn't matter since Black still can not win the game (after he survived white's attack).