Zen (software)

Zen, sold as Tencho no Igo (Japanese: 天頂の囲碁, literally Zenith Go) in Japan, is a Go playing engine developed by Yoji Ojima (尾島陽児), a Japanese Go programmer.

History

Zen won a gold medal in 14th Computer Olympiad in May 2009.[1] It won the Computer Go UEC Cup in 2011, 2014, and 2016.

In 2011, Zen19D reached 5 dan on the KGS Go Server, playing games of 15 seconds per move. The account which reached that rank uses a cluster version of Zen running on a 26-core machine.[2]

In 2012, Zen beat Takemiya Masaki (9p) by 11 points at five stones handicap, followed by a 20-point win at four-stone handicap in the 6th E&C Symposium in Japan.[3]

Zen defeated Kobayashi Koichi at three-stone handicap in the 4th Densei-sen on 23 March 2016.[4]

Zen's first commercial version was released in Japan on 18 September 2009. Zen 2 was released on 27 August 2010, Zen 3 on 30 September 2011, Zen 4 on 27 July 2012, and Zen 5 on 13 December 2013.

After the AlphaGo AI defeated professional players Fan Hui 2d and Lee Sedol 9d in 2015 and 2016, Yoji was inspired to upgrade Zen with deep learning algorithms. In November 2016, “DeepZenGo” had three games against against Cho Chikun 9d and the AI won one of them. This made Zen the second computer go program to win against a human top player without handicap stones.

References

  1. ↑ "Zen's record". International Computer Games Association. Retrieved 14 April 2016.
  2. ↑ "KGS Game Archives". Retrieved 28 January 2016.
  3. ↑ "Zen computer Go program beats Takemiya Masaki with just 4 stones!". Go Game Guru. Retrieved 28 January 2016.
  4. ↑ "4th Densei-sen". Retrieved 14 April 2016.
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