Analysis of game # 676337 (2) Reversi forum

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Analysis of game # 676337 (2)
  • klaashaas at 2007-04-19

    Or let's not use javascript:)

    Analysis of game # 676337

  • klaashaas at 2007-04-19

    Generated by WZebra 4.2.1 (and edited by klaashaas)

    Date: Thu Apr 19 13:53:28 2007


    Analysis

    This game was played between me (klaashaas)

    and Marius Halsør and was part of the Littlegolem Monster\
    \
    Tournament (aka the Monstership)
    . For long time, it seemed to be a close game, but at some point Marius screwed up. It's not a particular good game: there are plenty of weaker moves, so that's not the reason

    why I analysed it. The reason is that Marius asked me to show him his mistakes. In stead of tell him pesonally, I thought it would be more

    beneficial to share this on the forum. Basic knowledge of othello is assumed.

    First move:##   A  B  C  D  E  F  G  H1 |53|52|34|27|35|36|42|  | 12 |54|51|22|16|17|39|46|50| 23 |30|38| 3| 4|15| 6|18|49| 34 |29| 9| 5|()|##| 7|37|44| 45 |28| 8|11|##|()| 1|47|45| 56 |20|19|14| 2|12|23|10|31| 67 |  |  |21|13|24|26|  |48| 78 |  |41|40|33|32|25|43|  | 8   A  B  C  D  E  F  G  H##:() - 23:35
    

    w.6: White f3 is a mistake. f4 is the normal answer, because if white f3 is played…

    Diagram 1

    b.11: …back c5 should have been at e3, leading to a posistion where white can only play in one direction (north). See diagram 1. When white plays north from black position, a big step in getting yourself surrounded is made. Getting yourself surrounded in the opening is good :)

    b.13: I want to play e3, but I first need to spoil the white's c6, which would have been e strong move for white, sincehe it only flips an inner disc at d5.

    b.20: This was a mistake. Now I give white a free move at c2 (free, because it only flips an inner disc), and I can't reply it directly.

    w.26: From this point, the game becomes very interesting.

    b.31: I don't want to give him extra moves on the east side. H6 does just that. Okay, he can now play at h5 or h7. But both moves can easily be answered by me (h4/h8), leaving him with the same initial problem of finding a move somewhere on the board (in contrast with other games, making a move usually weakens your own position in othello).

    w.32:White e8 doesn't do much. b3 seems is a better choice. Okay, e8 avoids black from playing e8, but after b3,e8 white has c1, which black can't answer very well (b1 leads to a poor position for black).

    w.38: According to computer analysys, b3 leads to a draw, but a sequence starting with h4 is a win (+2). b3 is good style, though, and I'm sure many of the stronger players would play it too in this situation.

    Diagram 2

    w.40: This is your losing move. It should have been at h5. Prior to move 40, my options were very limited. My constant worry is finding a move which you can't easily reply. g8 isn't an option, because you can then play b8. Anything in the north-west corner is not good either. So basically, my only options are around g3. h5 is just according to the fundamentals of othello: don't create new options for your oponnent.

    w.42: g1 is a present from white. After this move, the game was clearly over. I have the 'free' and strong g8 to play. Free, because it doesn't give white any newoptions and strong because it removes the weakness after white g7 (if white plays g7, black can't easily take the corner, because if he doeswhite will wedge into g8 and grabs the a8 corner and most of the 8th row.

    In stead of g1, white could have made things complicated by playing g7.

    Game Graph

    ![](http://klaashaas.homelinux.org/www/othello/klaashaas-Marius Halsor (676337).png)

    Game Data

    How to interpret WZebra's analysis


    Copyright: Gunnar Andersson & Lars Ivansson.

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