Go Commentary: Gu Li vs Iyama Yuta – 1st Bosai Cup

This game was the final of the Bosai Cup between Gu Li 9p and Iyama Yuta 9p. Both players defeated Lee Sedol 9p before this game.

Iyama played this game wonderfully. White 112 was the winning move. Iyama’s endgame was perfect, and Gu didn’t get any chances afterwards.

This game should be one of Iyama’s best games, I’m sure.

Commented game record

Gu Li vs Iyama Yuta – 1st Bosai Cup, final


Download SGF File (Go Game Record)


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About Younggil An

Younggil is an 8 dan professional Go player with the Korean Baduk Association. He qualified as a professional in 1997 and won an award for winning 18 consecutive professional matches the following year. After completing compulsory military service, Younggil left Korea in 2008, to teach and promote the game Go overseas. Younggil now lives in Sydney, Australia, and is one of the founders of Go Game Guru. On Friday evenings, Younggil is usually at the Sydney Go Club, where he gives weekly lessons and plays simultaneous games.

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  1. Great review! Thank you An Younggil!

  2. frederic says:

    Thank you very much, iyama play very well

  3. The commentary says, of White 14, “This is one of Iyama’s favourite moves. A or B is more common instead.”Out of 176 games in the rather large and up-to-date GoGoD database Iyama has played this move just once. There may be some other games but it still seems hard to justify calling it a favourite.
    If the reference is not to this position but to the high distant White approach in general, there are just 7 examples by Iyama compared to 63 high close approaches.

    Also, according to the database, B is common but A seems very rare.

    May I ask what I have missed?

    • An Younggil 8p says:

      Good question!
      I asked one of my Korean pro friends to get more information of this game, and he said that the approach is Iyama’s favourite. Actually, 7 out of 63 is quite a big number compare to other top players’, and also Iyama might have played that approach at the preliminary matches or practice games In Korea.
      In my opinion, there’re some things you can’t judge from that sort of data base in Go.  

      For the second question, I might be wrong about A. W normally plays at A, and when B answers at B, then W plays at A. It could be my mistake. 
      Thank you for your attention and questions. I learned a lot from them. 😀

    • Jonathan says:

      Would you mind being a little clearer about the local search you did? For that one I can’t replicate your results.

  4. Zarathustra says:

    Thanks for the commentary.

    This game inspired me immensely. Now, seeing their mistakes and why their moves were right is very enlightening 🙂

  5. P4 for move 17 is also possible. Presumably P5 P3; P6 follow?

    Is this bad for black here? Hard for an amateur to judge if so. How do you work that out? 🙂

    • Younggil An says:

      That’s also a good idea.
      Black’s not bad with that attachment, but Iyama didn’t play there because White can easily tidy up his shape I think.