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	2380	38	3	5
2	Olivier Tschopp	2372 (?)	7	0	0
3	Kirill Zaitsev	2235	27	5	6
4	Vincent Lou	2221	22	5	1
5	Anton Hul	2208	38	8	4
6	Mateo Rodriguez Polo	2153	21	6	2
7	Matej Jusup	2148	22	6	2
8	Mustafa Batuhan Iliev	2134	26	7	3
9	Vincent Christien	2117	16	4	3
10	Pau Juan Bartroli	2086 (?)	6	3	0
11	Subramanian Ramasubramanian	2075	16	4	1
12	Max Newsome	2072	15	5	1
13	Milko Bakalov	2052	8	3	3
14	Yun Pan	2027	50	18	4
15	Alp Hidiroglu	2020 (?)	4	1	2
16	Marco Pastore	2020 (?)	3	1	3
17	Thomas Allard	1998	14	7	2
18	Yven Kius	1990	13	5	3
19	Markus Fasching	1983	20	9	2
20	Michael Zeller	1972 (?)	5	2	2
21	Cledion Lika	1957 (?)	4	3	0
22	Menderes Eroglu	1943	11	2	0
23	Anonymous	1942
24	Max Baharev	1936 (?)	5	2	0
25	Anonymous	1934
26	Anton Künzi	1932	19	11	2
27	Chaojie Li	1918	8	4	3
28	Jan Selinga	1909	9	4	0
29	Fabian Fong Schmid	1884	9	4	1
30	Philip Olson	1883	9	4	1
31	Ritvik Radhakrishnan	1880	17	10	3
32	Anonymous	1878
33	Anonymous	1872
34	Florian Stäuble	1854 (?)	4	3	0
35	Jasper Dekoninck	1847	12	6	1
36	Hongwei Zheng	1847	10	6	0
37	Giacomo Colombo	1846	36	20	3
38	Ruslan Shumilov	1828 (?)	5	3	0
39	Menderes eroğlu	1825 (?)	7	4	0
40	Dorian Quelle	1822	24	15	3
41	Marcus Imris	1790	40	24	4
42	Anna Adzic	1784	18	11	2
43	Tarek Souissi	1783	8	5	1
44	Alessandro Bruno	1753 (?)	5	4	0
45	Amit Sant	1750 (?)	4	3	0
46	Anonymous	1734
47	Anselm Schönbächler	1731 (?)	5	3	1
48	Maximilian von Willich	1731 (?)	7	4	0
49	Krithik Chockalingam	1725 (?)	4	3	0
50	Flurin Yenigün	1719 (?)	4	3	0
51	Mark Shen	1708	10	10	1
52	Federico Guglielmotti	1708	8	5	1
53	Popovici Daniel	1692 (?)	4	2	1
54	Anton De Ruig	1686	10	7	1
55	Fionn Smith	1685	17	13	2
56	Alexandre Terrail	1669	11	9	3
57	Fabio Rentsch	1668 (?)	6	5	0
58	Michael Schröder	1652 (?)	3	3	1
59	Anonymous	1643
60	Federico Arangath	1640	7	6	1
61	Ana Marija Vego	1636	29	26	3
62	Daniel Richter	1635 (?)	4	3	0
63	Anonymous	1634
64	Yasin Yuece	1628 (?)	5	4	0
65	Christoph Campora	1621	6	6	2
66	Lukas Lewark	1614 (?)	4	4	1
67	Anonymous	1610
68	Michael Klein	1587 (?)	3	3	1
69	Miguel Orbegozo Rodriguez	1583 (?)	5	4	0
70	Anonymous	1581
71	Jonas He	1580	11	9	1
72	Asaf Amitai	1572	11	12	2
73	Guohong Zhang	1563 (?)	3	4	0
74	Onno Riedel	1560	9	11	1
75	Robert Jahnke	1559 (?)	2	2	3
76	David Oort ALonso	1557	7	7	0
77	Emilio Grandinetti	1556	15	18	1
78	Anonymous	1556
79	Elia Steinfeld	1553	13	10	2
80	Felix Philipp	1545 (?)	5	4	0
81	Noah Meyer	1541	10	10	0
82	Vladislav Koshelev	1536	17	17	0
83	Dan Tecu	1535 (?)	4	4	1
84	Chris Hartl	1535 (?)	3	4	0
85	Mert Unsal	1532	7	7	0
86	Oliver Lucas Eggenberger	1530 (?)	3	3	1
87	Oliver Eggenberger	1529 (?)	3	4	0
88	Zoran Dragnic	1528	8	11	1
89	Stefano Rossi	1528	5	7	2
90	Darius Mathis	1527	12	18	0
91	Jacopo Bottoni	1519	9	9	2
92	Pau Gallardo	1505 (?)	4	5	0
93	Maywand Akthari	1503 (?)	3	4	0
94	Lorenzo Brini	1501 (?)	3	3	1
95	Alexander Meili	1499	6	7	1
96	Malik Ibrahim Awad	1497	4	7	3
97	Tetsu Guadagni	1494 (?)	3	4	0
98	Massimiliano Scarpa	1489 (?)	5	5	1
99	Peter Feller	1488 (?)	4	4	1
100	Kenny Lay	1486	13	15	0
101	Selim Bucher	1486 (?)	3	4	0
102	Lorenzo Benedetti	1484 (?)	3	3	1
103	Anonymous	1480
104	Jorin Strahl	1480	5	7	2
105	Ramon Alhambra	1477	16	16	3
106	Andreas Spanopoulos	1474	8	8	0
107	Anonymous	1470
108	Anonymous	1462
109	Oliver Rutkowski	1457	8	8	0
110	Benedict Himp	1457 (?)	2	5	0
111	Javier Alego	1456 (?)	4	5	0
112	Parth Kothari	1455 (?)	4	5	0
113	Valters Jēkabs Zakrevskis	1444 (?)	3	6	0
114	Joshua Mueller	1444 (?)	2	4	1
115	Mert Ünsal	1439 (?)	3	3	1
116	Martin Soldani	1438	9	12	0
117	Matteo Zuber	1437 (?)	2	5	0
118	Ioan Popescu	1429 (?)	2	4	0
119	Joshua Dreier	1424	6	8	0
120	Hardik Shah	1419 (?)	3	5	1
121	Joshua Müller	1416	13	21	1
122	Kevin Wu	1411	23	28	0
123	Anonymous	1400
124	Anonymous	1397
125	Anonymous	1395
126	Luka Vego	1394 (?)	3	4	0
127	Mirco Paul	1385	7	9	0
128	Brunel Altabba	1384	6	8	1
129	Alexander Martinez Ciani	1380	10	12	2
130	Anonymous	1369
131	Max Hürlimann	1365 (?)	2	5	0
132	Neryvaldo Galvao	1352	10	15	1
133	Christopher Narayanan	1349	6	10	0
134	Paschoud Jérôme	1344	5	9	0
135	Yann Spillmann	1335	11	23	1
136	Alexandre Nozadze	1323	9	13	1
137	Gennaro Tetsu Guadagni	1306	5	9	0
138	Ahmad Mahmood	1305	12	19	4
139	Anonymous	1295
140	Giorgs Cechladze	1294	6	12	3
141	Anonymous	1294
142	Anonymous	1293
143	Anonymous	1292
144	Aurèle Huillet	1288 (?)	2	6	0
145	Juan Garcia Amboage	1284	5	10	1
146	Anonymous	1276
147	Shrey Mittal	1272 (?)	4	5	0
148	Doan Dai Nguyen	1240 (?)	2	6	0
149	Noé Stammbach	1216	3	10	0
150	Nicola Kong	1213	9	24	1
151	Osman Yasar	1210 (?)	2	5	0
152	Florian Landis	1207 (?)	2	5	0
153	Jan Hirth	1201 (?)	2	3	0
154	Vijay Deshmukh	1171 (?)	2	7	1
155	Sebastian Pfaff	1169 (?)	2	4	0
156	Michele Dalle Rive	1160 (?)	1	5	0
157	Peter Karoly	1142 (?)	1	6	1
158	Dario Monopoli	1136	4	16	1
159	Denis Gadient	1133 (?)	1	3	0
160	Rainer Büchi	1124 (?)	1	6	0
161	Fred Damberger	1106 (?)	1	6	0
162	Michiel Swerts	1100 (?)	1	2	0
163	Anonymous	1098
164	Timosh Rueff	1098 (?)	1	3	0
165	Joscha Rotzer	1095 (?)	0	4	1
166	Tom Claikens	1094 (?)	1	5	0
167	Anonymous	1038
168	Kilian	1013 (?)	0	2	0
169	Auguste Darracq Paries	1002 (?)	1	6	0
170	Anonymous	995
171	Alessio Rimoldi	955 (?)	0	5	0
172	Felix Boltes	940 (?)	0	3	1
173	Edwin Albrecht	940 (?)	0	3	1
174	Victor Böttchen	916 (?)	1	5	0
175	Julius Diem	798 (?)	0	7	0
176	Anonymous	745
177	Nicolò Massari	701 (?)	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.