The G-Research 2019 London Riichi Open


A MERS certified 2 day Riichi Mahjong tournament, sponsored by G-Research.

Taking place December 7th-8th at our Central London headquarters.

The first prize will be a place at the World Riichi Championship 2020!

Scroll down to see more and to register.


An 8 round, round-robin style tournament using EMA Riichi Competition Rules. It will be spread over two days with 5 hanchan on Saturday 7th December and the remaining 3 hanchan on Sunday 8th December.

Player numbers will be chosen randomly before the event and player rotations will be calculated to minimise the likelihood of playing the same opponent multiple times.

A yaku and scoring reference sheet will be available at all tables.

Please note that as a WRC Qualifier event all players must abide by the WRC Standards of Conduct


Whittington House
19-30 Alfred Place

The closest London Underground Station is Goodge Street, with Warren Street, Tottenham Court Road and Euston Square within easy walking distance. We are also served by a number of buses and are fairly close to Euston Station for national rail services.


The first prize will be a place at the World Riichi Championship 2020!

There will also be additional prizes for second and third place, including a trophy.

Read more about the World Riichi Championship here.

Sponsor: G-Research

G-Research is a leading quantitative research and technology company. By using the latest scientific techniques, we produce world-beating predictive research and build advanced technology to analyse the world’s data.

There is also a lively social side to G-Research with many team events and company-wide celebrations. This includes a large Mahjong group, with play most lunchtimes and frequent sponsored after work events. We are even soon to have our own automatic Mahjong table!

Sound Interesting?

Join us and you’ll explore complex challenges with some of the world’s smartest people in an open and informal environment. We are all working towards achieving our long-term goal: human ingenuity limited only by the speed of thought.


Entry is set at £30 GBP. Breakfast, lunch, drinks and snacks will be provided on both days.

The proceeds from this fee will go towards sponsorship of the UKMA

While this is an open event we ask players to keep to a tournament-level standard of play, and ensure all rules and penalties are enforced. There will be at least one EMA-certified non-player referee.

To be eligible to participate you must be familiar with the EMA Riichi Competition Rules and be capable of playing unaided. You will be asked to self certify your ability to play when registering.


Saturday December 7th

08:30 Breakfast
09:00 Registration
09:30 Announcements
09:40 Hanchan 1
11:30 Hanchan 2
13:00 Lunch
14:30 Hanchan 3
16:20 Hanchan 4
18:10 Hanchan 5
19:40 End of Day 1

Sunday December 8th

08:30 Breakfast
09:10 Hanchan 6
11:00 Hanchan 7
12:30 Lunch
14:00 Hanchan 8
15:50 Prizes
16:00 Closing Ceremony


For any enquiries related to the tournament please contact a member of our team at

Please note that the event has now reached capacity – inscriptions are now closed until further notice.


Name EMA Number Country Status
1 Axel Eschenburg 05100090 Germany Confirmed
2 Victoria Lopez Morales 11990124 United Kingdom Confirmed
3 Benedetta Tesi 07000023 Italy Confirmed
4 Maria Chapman 11990109 United Kingdom Confirmed
5 Joaquin Derrac Rus 10990076 Spain Confirmed
6 Anthony Ea 04040105 France Confirmed
7 Ian Fraser 11990005 United Kingdom Confirmed
8 Alexey Belovs 11990099 United Kingdom Confirmed
9 Timur Hahn 05100153 Germany Confirmed
10 Peter Langford 11990004 United Kingdom Confirmed
11 Luna Fountain United Kingdom Confirmed
12 Niklas Johansson 09990110 Sweden Confirmed
13 Russell Chan 11990100 United Kingdom Confirmed
14 Valentin Courtois 04310012 France Confirmed
15 Mark Jenking-Rees 11990115 United Kingdom Confirmed
16 H John Duckworth 11990016 United Kingdom Confirmed
17 Shaun Drury 11990059 United Kingdom Confirmed
18 Daniele Cesarini 07000145 Italy Confirmed
19 Jason He 11990093 United Kingdom Confirmed
20 Hong Li 11990086 United Kingdom Confirmed
21 Benjamin Savoy United Kingdom Confirmed
22 Joshua Banister United Kingdom Confirmed
23 Christopher Endicott 11990060 United Kingdom Confirmed
24 Sonia Yagi 11990081 United Kingdom Confirmed
25 Foppe Bakker 08010580 The Netherlands Confirmed
26 He Ziyu China Confirmed
27 Jack Kwan United Kingdom Confirmed
28 Miłosz Meller 19000077 Poland Confirmed
29 Taylor Heffernan United States Confirmed
30 Nick Rhoades United States Confirmed
31 Edwin Dizon United States Confirmed
32 Tony Haley 11990017 United Kingdom Confirmed
33 Bryan Manchez 04320013 France Confirmed
34 Lena Weinguny 01000053 Austria Confirmed
35 Alasdair McBride United Kingdom Confirmed
36 Michael Short 11990085 United Kingdom Confirmed
37 Thom Diment 11990101 United Kingdom Confirmed
38 Claire Pozniak United States Confirmed
39 Jay Li 11990105 United Kingdom Confirmed
40 Ans Hoogland 08010166 The Netherlands Confirmed
41 Cor Hoogland 08010151 The Netherlands Confirmed
42 Michael van der Sluijs 25000002 Romania Confirmed
43 Rene Khezam 25000001 Romania Confirmed
44 Alex Leet Estonia Confirmed
45 Katie Lau 11990082 United Kingdom Confirmed
46 Piotr Baranowski 11990098 United Kingdom Confirmed
47 Wai Taur United States Confirmed
48 Anastasiia Veremenko 21000067 Ukraine Confirmed

Wait List

Name EMA Number Country
1 Morten Andersen 03000051 Denmark
2 Karolina Trepinska 04300022 France
3 Duy Le 11990123 United Kingdom
4 Olga Igarashi 19000087 Poland
5 David Clarke 11990047 United Kingdom
6 Tibor Taku jones United Kingdom
7 Lewis Colwill United Kingdom
8 Jesper Nøhr 03000176 Denmark
9 Krisztian Deak 01000136 Austria
10 Angus Fisk 11990102 United Kingdom


Name EMA Number Country
Gemma Sakamoto 11990006 United Kingdom


UK Mahjong Association Logo
UK Mahjong Association
World Riichi Championship Logo
World Riichi Championship

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