Was Jorge Sammour-Hasbun the USCL's rookie of the year?

A few days ago in this blog entry, using the USCL rating system I developed, whether Todd Andrews should have won the USCL's Most Improved Player award. Today, I examine whether Jorge Sammour-Hasbun of the Boston Blitz should have won the Rookie of the Year award.

Sammour-Hasbun had a fantastic year in the USCL. He won six and drew two, without a loss. (Indeed his results in other tournaments have been similarly great; he just repeated as champion of the Dos Hermanas tournament - which was an incredible feat, given the competition he knocked out on the way there.)

But was he really the USCL's rookie of the year? How should that even be defined?

Let's start with the USCL rating system. One measure of whether a player is the rookie of the year is comparing the player's initial assigned rating and the player's rating at the end of the year, on the final 2007 list, and looking for the greatest difference. Remember that initial ratings are assigned by the board on which the player first competed.

Given that criterion, the rookie of the year would be the New York Knights' Irina Zenyuk (also spelled Iryna - I don't know what she prefers). She gained 136 points from her initial rating, while Sammour-Hasbun gained 125. Zenyuk also had an excellent year, with four wins, three draws, and a single loss.

Here are the top five rookies of 2007. They must have played a minimum of three games in 2007 to be included on this list.

1. Irina Zenyuk 2386 (+136, started at 2250, board 4)
2. Jorge Sammour-Hasbun 2575 (+125, started at 2450, board 2)
3. Eric Rodriguez 2370 (+120, started at 2250, board 4)
4. Chris Williams 2363 (+113, started at 2250, board 4)
5. Francisco Guadalupe 2352 (+102, started at 2250, board 4)

What rookie will take the award this year?

Was Todd Andrews the USCL's most improved player?

Todd Andrews won the "Most Improved Player Award" in the United States Chess League last season. Using the USCL rating system I developed, one thing we can check is whether this award was justified.

The easiest measure of this is the greatest difference between the rating on the final 2006 list and the rating on the final 2007 list. We have to set a one criterion, however; the player must have played a minimum of three games in 2007 in order to be eligible for consideration, as well as at least three in 2006 or earlier. (Remember also that the USCL ratings are dependent to some degree on how the player's results contributed to the team's results.)

So, did Todd Andrews have the greatest difference between these two lists? No! That honor goes to Davorin Kuljasevic, who gained 106 points from 2006 to 2007. Andrews gained 101 points in the 2007 season.

Here are the top five most improved players from 2006 to 2007, according to the USCL rating list.

1. Davorin Kuljasevic +106 (2434 to 2540)
2. Todd Andrews +101 (2307 to 2408)
3. Mackensie Molner +74 (2266 to 2339)
4. Jonathan Schroer +55 (2338 to 2393)
5. Marcel Martinez +41 (2345 to 2386)

In an upcoming post, we'll try and figure out the rookie of the year award.

USCL Ratings (with 2007 Final List)

I have independently created a United States Chess League rating system that takes into several elements that other rating systems do not. Most importantly, the USCL ratings take into account that players are part of a team, and their strategy about how to conclude their individual games depend on the games situations of their teammates.

Here is an overview of the USCL rating system.

1. Modified Glicko

Rating calculations are based on the Glicko system, with some minor modifications. These modifications are as follows:
(a) Maximum RD is 100 (not 350);
(b) Ratings are updated after every game;
(c) At the end of each season, each RD is modified by increasing it 1/2 its distance to 100. For example, if a player's RD is 40, then the new RD is 40+((100-40)/2) or 40+(30) or 70. This eliminates step 1b in the Glicko process.

2. Initial Ratings Based on Board

Initial ratings for each player are based on which board they played the first time they played in a USCL match. Players who were Board 1 start with an initial rating of 2550; Board 2, 2450; Board 3, 2350; Board 4, 2250. All are set with an RD (ratings deviation) of 100.

3. Expected Score Depends on Color

Expected score from each game is modified by the color each player has. An initial investigation showed that, in the USCL, the performance rating of a player with the White pieces is about 72 points higher than the performance rating of a player with the Black pieces. Therefore, when calculating expected score of a games between two players, we temporarily add 36 points to White's rating, and subtract 36 points from Black's rating.

4. All Games Rated with Equal Weight

All games, including playoff games and blitz tiebreak games, were given equal weight in the ratings.

5. Scores for Draws Depend on Team Result

In team chess, where the goal of the team is to win the match (with 2.5/4 points or more, or 2/4 in a match with draw odds), individual results can be skewed by the circumstances of the match situation. For example, if it looks like your team is about to win two games and lose one game, winning the match comes down to what happens on your board. Suppose that in your game you have a moderate advantage, but the position is dynamic and unstable. In such a case, you might decide to trade all your pieces to reach a dead drawn endgame, so that you will draw the game and clinch the match for your team. This is fundamentally a good result for your team, as your will win the match.

Therefore, the result of the team match is considered when assigning scores for individual players' draws. If the final team match is drawn, each player who drew gets 1/2 point. If a team wins, all the players on the winning team who drew their games get 2/3 point each. Conversely, all the players on a losing team who drew their games get 1/3 point each. (Wins are still 1 and losses are still 0, regardless of the team match score.) Note that these point assignments are only for rating calculations only.

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Final 2007 United States Chess League Rating List

• Every game in every season of the USCL was rated, not just 2007.
• Only players who were played at least one game in 2007 (i.e., active) are included in the list.
• Players must have played at least three games in the history of the USCL to be included in the list.
• While every effort has been made to ensure accuracy, re-rating might occur to correct any mistakes.

1	2591 Sergey Kudrin
2	2589 Vinay Bhat
3	2586 Patrick Wolff
4	2581 Larry Christiansen
5	2580 Hikaru Nakamura
6	2579 Jorge Sammour-Hasbun
7	2576 Joel Benjamin
8	2571 Drasko Boskovic
9	2569 Gregory Serper
10	2566 Julio Becerra
11	2543 Davorin Kuljasevic
12	2523 Jacek Stopa
13	2522 Eli Vovsha
14	2519 John Donaldson
15	2505 Pawel Blehm
16	2495 Josh Friedel
17	2494 Alex Stripunsky
18	2491 Lev Milman
19	2487 Georgi Orlov
20	2487 Dean Ippolito
21	2484 Pascal Charbonneau
22	2481 Eugene Perelshteyn
23	2477 Irina Krush
24	2466 Jay Bonin
25	2463 Vince McCambridge
26	2460 Bryan Smith
27	2454 Tegshsuren Enkhbat
28	2453 Dmitry Schneider
29	2449 Denis Shmelov
30	2441 Eric Tangborn
31	2440 Ron Burnett
32	2433 Marcel Milat
33	2432 Slava Mikhailuk
34	2428 Sam Shankland
35	2423 Oleg Zaikov
36	2415 John Bartholomew
37	2415 Robert Hess
38	2411 Richard Costigan
39	2407 Dmitry Zilberstein
40	2406 Jonathan Schroer
41	2405 Keaton Kiewra
42	2402 Irina Zenyuk
43	2399 William Kelleher
44	2397 Blas Lugo
45	2389 David Pruess
46	2389 Francisco Guadalupe II
47	2388 John Readey
48	2387 Andrei Zaremba
49	2386 Aviv Friedman
50	2382 Mikhail Zlotnikov
51	2381 Marcel Martinez
52	2380 Todd Andrews
53	2366 Parker Zhao
54	2365 Elvin Wilson
55	2361 Bruci Lopez
56	2360 Chris Williams
57	2358 Katerina Rohonyan
58	2354 Larry Kaufman
59	2354 Vadim Martirosov
60	2353 Daniel Yeager
61	2343 John Rouleau
62	2334 Mackenzie Molner
63	2333 Eric Rodriguez
64	2327 Bayaraa Zorigt
65	2322 Victor Shen
66	2319 Miguel Espino
67	2314 James Critelli
68	2311 Marc Arnold
69	2309 Michael Thaler
70	2307 Peter Bierkens
71	2304 Luis Barredo
72	2303 Loren Schmidt
73	2301 Evan Ju
74	2301 Gregory Young
75	2300 Matthew Herman
76	2297 Alejandro Moreno Roman
77	2295 Craig Jones
78	2287 Michael Lee
79	2279 John Timmel
80	2276 Ralph Zimmer
81	2265 Daniel Naroditsky
82	2264 Udayan Bapat
83	2263 Ilya Krasik
84	2261 Tsagaan Battsetseg
85	2258 Josh Sinanan
86	2239 Matthew Bengtson
87	2228 Peter Bereolos
88	2211 Jerry Wheeler
89	2209 Gerald Larson
90	2183 James Wu

NOTE: While the commissioner of the United States Chess League is aware of the existence of these ratings and the rating system, neither the ratings nor the rating system have been officially endorsed nor sanctioned by the Unites States Chess League, its affiliates, or sponsors.