Polyrating - SKETHZ

Finally! Our rating system is there! We computed player ratings based on all tournaments from the past two years, a total of around 1700 games. You can now compare your rating with others and see where you stand!

The rest of this post will contain some basic information about the rating system. We will also include some statistics etc. 🙂

First things first, a couple of questions you might have when you see the ratings:

Who is included in the leaderboard?

Only players that played at least one tournament in the last year are included on the leaderboard.

Who is “anonymous”?

Anonymous players are players who only played before the ETH Chess Championship in 2024. Since we did not ask for permission to publish names in the leaderboard before this tournament, we did not include their names.

Why can I not see my name?

You have not played a tournament in the last academic year or you did not play after the ETH Chess Championship. If the latter is the case, you can contact us and we will de-anonymize your name on the leaderboard.

Why is there a question mark behind my rating?

You have played less than 12 games in our tournaments. Your rating is therefore considered provisional.

Can you please exclude my name from the leaderboard?

Of course! Just contact us and we will remove your name!

Where can I register a rated game played during a casual event?

Easy! Just fill in the form on this page: https://chess.ethz.ch/rated-game/

Okay, apart from those question, there are a couple more things I want to tell you about the ratings before you can dive into them 🙂

Yes, your rating can change even if you did not play in the last tournament.

Since players do not play a lot of games, we have to be a bit smarter about our rating system than usual. This means that when deciding on the new rating, our system also looks back and retroactively changes your rating. For example, if the opponent that beat you last time suddenly gains a lot of rating in the new tournament, you will get some rating back as well!

No, do not compare your rating with your Lichess/Chess.com/FIDE Rating.

You should only compare your polyratings with other polyratings. It is not supposed to mimick any other rating system.

Rank	Name	Rating	Wins	Losses	Draws
1	Theo Stijve	2375	38	3	5
2	Olivier Tschopp	2369 (?)	7	0	0
3	Kirill Zaitsev	2231	27	5	6
4	Vincent Lou	2213	22	5	1
5	Anton Hul	2163	31	8	4
6	Matej Jusup	2147	22	6	2
7	Max Newsome	2146	11	3	0
8	Mateo Rodriguez Polo	2138	21	6	2
9	Mustafa Batuhan Iliev	2127	26	7	3
10	Vincent Christien	2114	16	4	3
11	Pau Juan Bartroli	2075 (?)	6	3	0
12	Milko Bakalov	2047	8	3	3
13	Yun Pan	2042	46	16	3
14	Subramanian Ramasubramanian	2025	10	3	1
15	Thomas Allard	1997	14	7	2
16	Alp Hidiroglu	1995 (?)	4	1	2
17	Markus Fasching	1979	20	9	2
18	Michael Zeller	1969 (?)	5	2	2
19	Cledion Lika	1952 (?)	4	3	0
20	Anonymous	1940
21	Menderes Eroglu	1938	11	2	0
22	Anonymous	1931
23	Anton Künzi	1930	19	11	2
24	Yven Kius	1929	9	3	2
25	Jan Selinga	1922	9	4	0
26	Chaojie Li	1920	8	4	3
27	Dorian Quelle	1899	21	11	3
28	Philip Olson	1881 (?)	4	2	1
29	Anonymous	1875
30	Ritvik Radhakrishnan	1873	17	10	3
31	Anonymous	1868
32	Giacomo Colombo	1846	36	20	3
33	Hongwei Zheng	1843	10	6	0
34	Jasper Dekoninck	1833	12	6	1
35	Ruslan Shumilov	1823 (?)	5	3	0
36	Menderes eroğlu	1809 (?)	3	1	0
37	Marcus Imris	1796	36	21	4
38	Anna Adzic	1777	18	11	2
39	Alessandro Bruno	1749 (?)	5	4	0
40	Amit Sant	1744 (?)	4	3	0
41	Tarek Souissi	1744	8	5	1
42	Anonymous	1728
43	Fabian Fong Schmid	1728 (?)	4	2	1
44	Anselm Schönbächler	1727 (?)	5	3	1
45	Onno Riedel	1716	7	6	1
46	Maximilian von Willich	1712 (?)	7	4	0
47	Flurin Yenigün	1695 (?)	4	3	0
48	Anton De Ruig	1682	10	7	1
49	Fionn Smith	1681	17	13	2
50	Popovici Daniel	1677 (?)	4	2	1
51	Alexandre Terrail	1663	11	9	3
52	Daniel Richter	1653 (?)	4	3	0
53	Emilio Grandinetti	1652	13	13	1
54	Anonymous	1639
55	Anonymous	1637
56	Ana Marija Vego	1634	29	26	3
57	Federico Arangath	1628	7	6	1
58	Yasin Yuece	1623 (?)	5	4	0
59	Christoph Campora	1610	6	6	2
60	Lukas Lewark	1606 (?)	4	4	1
61	Anonymous	1604
62	Mark Shen	1602	6	7	1
63	Anonymous	1589
64	Fabio Rentsch	1584 (?)	2	2	0
65	Miguel Orbegozo Rodriguez	1579 (?)	5	4	0
66	Robert Jahnke	1574 (?)	2	2	3
67	Jonas He	1570	11	9	1
68	Michael Klein	1563 (?)	3	3	1
69	Elia Steinfeld	1553	13	10	2
70	Anonymous	1553
71	Zoran Dragnic	1544	6	7	1
72	Felix Philipp	1543 (?)	5	4	0
73	Asaf Amitai	1541	9	9	0
74	Federico Guglielmotti	1540 (?)	3	3	1
75	Guohong Zhang	1532 (?)	3	4	0
76	Vladislav Koshelev	1530	17	17	0
77	Dan Tecu	1528 (?)	4	4	1
78	Mert Unsal	1526	7	7	0
79	Maywand Akthari	1526 (?)	3	4	0
80	Darius Mathis	1509	12	18	0
81	Jacopo Bottoni	1505	9	9	2
82	Pau Gallardo	1501 (?)	4	5	0
83	Selim Bucher	1497 (?)	3	4	0
84	Alexander Meili	1486	6	7	1
85	Peter Feller	1480 (?)	4	4	1
86	Noah Meyer	1479	7	7	0
87	Anonymous	1477
88	Oliver Lucas Eggenberger	1477 (?)	3	3	1
89	Kenny Lay	1472	13	15	0
90	Massimiliano Scarpa	1469 (?)	5	5	1
91	Anonymous	1467
92	Ramon Alhambra	1465	16	16	3
93	Anonymous	1459
94	Oliver Rutkowski	1455	8	8	0
95	Javier Alego	1454 (?)	4	5	0
96	Stefano Rossi	1451 (?)	2	3	2
97	Lorenzo Brini	1449 (?)	3	3	1
98	Andreas Spanopoulos	1448	8	8	0
99	Parth Kothari	1447 (?)	4	5	0
100	Jorin Strahl	1446	5	7	2
101	Valters Jēkabs Zakrevskis	1440 (?)	3	6	0
102	Mert Ünsal	1431 (?)	3	3	1
103	Matteo Zuber	1422 (?)	2	5	0
104	Ioan Popescu	1422 (?)	2	4	0
105	Joshua Mueller	1419 (?)	2	4	1
106	Joshua Müller	1415	13	21	1
107	Hardik Shah	1410 (?)	3	5	1
108	Kevin Wu	1407	23	28	0
109	Anonymous	1403
110	Anonymous	1391
111	Anonymous	1390
112	Joshua Dreier	1385	6	8	0
113	Mirco Paul	1382	7	9	0
114	Brunel Altabba	1379	6	8	1
115	Alexander Martinez Ciani	1374	10	12	2
116	Neryvaldo Galvao	1365	7	11	1
117	Anonymous	1364
118	Max Hürlimann	1357 (?)	2	5	0
119	Malik Ibrahim Awad	1357 (?)	2	4	1
120	Christopher Narayanan	1343	6	10	0
121	Luka Vego	1329 (?)	3	4	0
122	Yann Spillmann	1327	11	23	1
123	Alexandre Nozadze	1319	9	13	1
124	Paschoud Jérôme	1318	5	9	0
125	Ahmad Mahmood	1301	12	19	4
126	Anonymous	1298
127	Gennaro Tetsu Guadagni	1292	5	9	0
128	Anonymous	1289
129	Anonymous	1289
130	Giorgs Cechladze	1288	6	12	3
131	Anonymous	1287
132	Aurèle Huillet	1279 (?)	2	6	0
133	David Oort ALonso	1275 (?)	3	4	0
134	Anonymous	1273
135	Shrey Mittal	1267 (?)	4	5	0
136	Juan Garcia Amboage	1256	5	10	1
137	Doan Dai Nguyen	1235 (?)	2	6	0
138	Nicola Kong	1209	9	24	1
139	Osman Yasar	1181 (?)	2	5	0
140	Jan Hirth	1179 (?)	2	3	0
141	Vijay Deshmukh	1171 (?)	2	7	1
142	Noé Stammbach	1162 (?)	2	5	0
143	Sebastian Pfaff	1150 (?)	2	4	0
144	Michele Dalle Rive	1146 (?)	1	5	0
145	Peter Karoly	1137 (?)	1	6	1
146	Dario Monopoli	1131	4	16	1
147	Denis Gadient	1131 (?)	1	3	0
148	Rainer Büchi	1113 (?)	1	6	0
149	Fred Damberger	1100 (?)	1	6	0
150	Joscha Rotzer	1096 (?)	0	4	1
151	Anonymous	1094
152	Timosh Rueff	1092 (?)	1	3	0
153	Anonymous	1035
154	Kilian	1000 (?)	0	2	0
155	Anonymous	991
156	Auguste Darracq Paries	955 (?)	1	6	0
157	Alessio Rimoldi	948 (?)	0	5	0
158	Felix Boltes	937 (?)	0	3	1
159	Edwin Albrecht	934 (?)	0	3	1
160	Victor Böttchen	894 (?)	1	5	0
161	Anonymous	741
162	Nicolò Massari	668 (?)	0	7	0

A (small) analysis of the ratings

I will not dive into the mathematical details of the rating system here. In case you are interested, the rating system follows this paper with some additional improvements for speed and stability purposes. We will publish our code base for calculating these ratings at a later point in time.

Since plots say more than a 1000 words, let’s just look at some plots 🙂 Below, you can see three plots. The first shows the distribution over ratings and the second shows the win rate by color. The last plot shows the likelihood that you win a game based on the rating difference with your opponent. You can see both the observed probability (based on our games) and the one predicted by the rating system.