Chess

The humans fought back in the fifth round of the Aegon Man versus Machine tournament in The Hague winning, according to the official press release, "convincingly by the narrowest margin". Oxymoronic it may be, but when you've just been beaten by 301/2-171/2, even a 241/2-231/2 win must feel convincing.

Nevertheless, the machines still lead by the convincingly large margin of 130-109 with only one round left to play.

The following games show some of the strengths and weaknesses of computer chess.

In the first, the machine looks hesitant with 10.Be2 and 11.Bd3, but its h-pawn charge immediately afterwards is quite the opposite.

With 14...Bh6 inviting such problems as 15.e5 fxe5 16.Rxh6 Nxh6 17.Bxg5, Nunn retreated his bishop, only to run into the brilliant 16.Nxd5! After 16...exd5 17.Bxh7+! Kxh7 18.Qd3+ Kg8 19.Qg6+ Black is mated.

The next blow was 19.Bxg5! which would have been an imaginative and speculative sacrifice had a human played it, but the machine probably had it all worked out - at least as far as 25.e5, when it was clear Black was lost.

The finish was neat with 33.Bxb5 threatening Qd8 mate, and 34.Be8 planning 34...Rf5 (34...Qf5+ is met by 35.Kb3) 35.Qd7+ Kf6 36.Q g7 mate.

White: Quest

Black: John Nunn

1 e4 g6 18 Rh5 Rf7

2 d4 Bg7 19 Bxg5 Bxf3

3 Nc3 c6 20 gxf3 fxg5

4 Nf3 d5 21 Rxg5+ Kf8

5 h3 Nh6 22 Rdg1 Nf6

6 Bf4 f6 23 Ne4 Ndxe4

7 Qd2 Nf7 24 fxe4 Qxd4

8 0-0-0 0-0 25 e5 Ke7

9 Be3 a6 26 c3 Qb6

10 Be2 b5 27 exf6+ Bxf6

11 Bd3 e6 28 Rg8 Rxg8

12 h4 Nd7 29 Rxg8 Bh4

13 h5 g5 30 f4 Bf2

14 h6 Bh8 31 Kc2 Qe3

15 exd5 cxd5 32 Qd1 Qxf4

16 Nxd5 Bb7 33 Bxb5 Bb6

17 Nc3 Nd6 34 Be8 resigns

Here's a small measure of revenge for humankind:

White: Virtua Chess

Black: Zsuzsa Polgar

1 e4 e5 15 Qc6 Rd8

2 Nf3 Nc6 16 Ke1 Bg4

3 c3 d5 17 Bb2 Rd2

4 Bb5 dxe4 18 Qc4 Rxb2

5 Nxe5 Qd5 19 Rc1 Re2+

6 Qa4 Qxe5 20 Qxe2 Bxe2

7 Bxc6+ bxc6 21 Kxe2 Qh5+

8 Qxc6+ Kd8 22 Ke1 Ng3

9 Qxa8 Nf6 23 Kf2 Nxh1+

10 Na3 Bc5 24 Rxh1 Qf5+

11 b4 Bxf2+ 25 Ke2 Qd5

12 Kxf2 e3+ 26 Ra1 Qxg2+

13 dxe3 Ne4+ White resigns

14 Ke2 Ke7

William Hartston

Have you tried new the Independent Digital Edition apps?
Independent Dating
and  

By clicking 'Search' you
are agreeing to our
Terms of Use.

iJobs Job Widget
iJobs People

Geography Teacher

£24000 - £33600 per annum + pre 12 week AWR : Randstad Education Manchester Se...

E150/2014 - English Language Checker (Grade B3)

On Application: Council of Europe: The European Court of Human Rights’s judgme...

Marketing Executive

£28000 - £32000 per annum: Charter Selection: A professional services company ...

Project Manager - Bristol South West

£400 - £450 per day: Orgtel: Project Manager (PM), Key Banking Client, Retail ...

Day In a Page

Iraq crisis: How Saudi Arabia helped Isis take over the north of the country

How Saudi Arabia helped Isis take over northern Iraq

A speech by an ex-MI6 boss hints at a plan going back over a decade. In some areas, being Shia is akin to being a Jew in Nazi Germany, says Patrick Cockburn
The evolution of Andy Serkis: First Gollum, then King Kong - now the actor is swinging through the trees in Dawn of the Planet of the Apes

The evolution of Andy Serkis

First Gollum, then King Kong - now the actor is swinging through the trees in Dawn of the Planet of the Apes
You thought 'Benefits Street' was controversial: Follow-up documentary 'Immigrant Street' has got locals worried

You thought 'Benefits Street' was controversial...

Follow-up documentary 'Immigrant Street' has got locals worried
Refugee children from Central America let down by Washington's high ideals

Refugee children let down by Washington's high ideals

Democrats and Republicans refuse to set aside their differences to cope with the influx of desperate Central Americas, says Rupert Cornwell
Children's books are too white, says Laureate

Children's books are too white, says Laureate

Malorie Blackman appeals for a better ethnic mix of authors and characters and the illustrator Quentin Blake comes to the rescue
Blackest is the new black: Scientists have developed a material so dark that you can't see it...

Blackest is the new black

Scientists have developed a material so dark that you can't see it...
Matthew Barzun: America's diplomatic dude

Matthew Barzun: America's diplomatic dude

The US Ambassador to London holds 'jeans and beer' gigs at his official residence – it's all part of the job, he tells Chris Green
Meet the Quantified Selfers: From heart rates to happiness, there is little this fast-growing, self-tracking community won't monitor

Meet the 'Quantified Selfers'

From heart rates to happiness, there is little this fast-growing, self-tracking community won't monitor
Madani Younis: Five-star reviews are just the opening act for British theatre's first non-white artistic director

Five-star reviews are just the opening act for British theatre's first non-white artistic director

Madani Younis wants the neighbourhood to follow his work as closely as his audiences do
Mrs Brown and her boys: are they having a laugh?

Mrs Brown and her boys: are they having a laugh?

When it comes to national stereotyping, the Irish – among others – know it can pay to play up to outsiders' expectations, says DJ Taylor
Gavin Maxwell's bitter legacy: Was the otter man the wildlife champion he appeared to be?

Otter man Gavin Maxwell's bitter legacy

The aristocrat's eccentric devotion to his pets inspired a generation. But our greatest living nature writer believes his legacy has been quite toxic
Joanna Rowsell: The World Champion cyclist on breaking her collarbone, shattering her teeth - and dealing with alopecia

Joanna Rowsell: 'I wear my wig to look normal'

The World Champion cyclist on breaking her collarbone, shattering her teeth - and dealing with alopecia
Bill Granger recipes: Our chef gives raw ingredients a lift with his quick marinades

Bill Granger's quick and delicious marinades

Our chef's marinades are great for weekend barbecuing, but are also a delicious way of injecting flavour into, and breaking the monotony of, weekday meals
Germany vs Argentina World Cup 2014 preview: Why Brazilians don't love their neighbours Argentina any more

Anyone but Argentina – why Brazilians don’t love their neighbours any more

The hosts will be supporting Germany in today's World Cup final, reports Alex Bellos
The Open 2014: Time again to ask that major question - can Lee Westwood win at last?

The Open 2014

Time again to ask that major question - can Lee Westwood win at last?