1st Bangkok Summer International Chess Challenger 2025

Open SwissStandard

62 players participated in this 9-round tournament, held from 04 Jul 2025 to 09 Jul 2025 in Bangkok, Thailand. 8 federations represented. Top 10 Elo average was 1820, and top seed was Remark Bartolome (🇵🇭 PHI, 1987).

Shubham Shukla (🇮🇳 IND, 1868) won with 8.5/9, ahead of Shangwei Guo (7.0) and N. Tarun (6.5). Shukla won solo starting round 6.

The biggest upset came in round 7: N. Tarun (1742) beat Remark Bartolome (1987), a +245-point gap.

Location

🇹🇭Bangkok, Thailand

Dates

04 Jul 2025 → 09 Jul 2025

Time control

Standard: 90 minutes with 30 second increment from move 1

System

Swiss · 9 rounds

Top seed

🇵🇭Remark Bartolome1987

Avg top 10

1,820

Participants

Federations · 8 represented

🇹🇭Thailand×27

🇷🇺Russia×5

🇮🇳India×5

🇵🇭Philippines×3

🇭🇰Hong Kong China×2

🇲🇾Malaysia×2

🇮🇩Indonesia×2

FIDE (no federation)×2

Top 3

🥇
Shubham Shukla
🇮🇳IND·1868
8.5pts·2171perf+42.4
🥈
Shangwei Guo
🇨🇳CHN
7.0pts·1853perf0.0
🥉
N. Tarun
🇮🇳IND·1742
6.5pts·1946perf+42.0

How it unfolded

Top 6 · 9 rounds

Shubham Shukla led from R4; +1.5-point edge over the runner-up.

Co-leaders

Shukla8.5Guo7Tarun6.5Dharmanto6.5Culasing6.5Bartolome6.5

R4–R9 · LEAD HELD

Shubham Shukla never relinquished the lead after R4; final gap +1.5 over the runner-up.

R7 · HEAD-TO-HEAD · WINNER VS 2ND

Shubham Shukla beat Shangwei Guo (Black).

WIN STREAKS · 2 top finishers

Shubham Shukla 4+4 wins (R1–R4, R6–R9)N. Tarun 4 wins (R5–R8)

Key matchups · top 4

Head-to-head between the four finishers

Player	1	2	3	4
1Shubham Shukla	*	1	1	1
2Shangwei Guo	0	*	1	—
3N. Tarun	0	0	*	—
4Clayton Valentino Dharmanto	0	—	—	*

Grille américaine

#	Player	Elo	Fed	R1	R2	R3	R4	R5	R6	R7	R8	R9	Pts	Bu C1	Bu	SB	Perf	Δ
1	Shubham Shukla	1868	IND	+39B	+13N	+4B	+6N	=7B	+10B	+2N	+12N	+3B	8.5	49.0	52.5	49.50	2171	+42.4
2	Guo, Shangwei	0	CHN	+19B	+43N	=10B	+3B	+11N	=5N	−1B	+7N	+14B	7.0	49.0	52.5	38.00	1853	0.0
3	N. Tarun	1742	IND	+25B	+24N	=7B	−2N	+21B	+13N	+5B	+4N	−1N	6.5	49.5	54.0	35.50	1946	+42.0
4	Culasing, Michael	1776	PHI	+59N	+22B	−1N	+32B	+24N	=11B	+6N	−3B	+12B	6.5	46.0	48.0	30.25	1836	+17.6
5	Bartolome, Remark	1987	PHI	+14N	+20B	−12N	+29B	+18N	=2B	−3N	+17B	+10N	6.5	45.5	50.0	34.50	1857	-17.8
6	Dharmanto, Clayton Valentino	1796	INA	+28B	+38N	+32B	−1B	+19N	+7N	−4B	=10B	+11N	6.5	45.5	49.5	31.75	1863	+38.8
7	Sajjapornthep, Jarunpol	1862	THA	+27N	+21B	=3N	+8B	=1N	−6B	+9N	−2B	+35N	6.0	50.0	54.0	33.00	1817	-3.2
8	Mahapiyasilp, Spa	1659	THA	+50B	=15N	+49B	−7N	+16B	−14N	+40B	=18N	+23B	6.0	39.0	42.0	25.25	1571	-28.0
9	Kvitkin, Anton	0	RUS	−42B	+47N	−24B	+41N	+28B	+38N	−7B	+26N	+18B	6.0	35.5	38.5	24.50	1625	0.0
10	Tun Naung	1816	MYA	+33N	+18B	=2N	+17B	+12B	−1N	=14B	=6N	−5B	5.5	50.0	54.0	29.50	1793	-2.0
11	Gutsulyak, Nikolay	1843	RUS	+41B	+16N	+26B	=12N	−2B	=4N	+15B	=14N	−6B	5.5	46.5	50.0	27.75	1781	-8.4
12	Shibin K Benny	1753	IND	+47B	+42N	+5B	=11B	−10N	+20B	+19N	−1B	−4N	5.5	46.0	49.0	25.75	1788	+11.0
13	Valentino, Rio	1590	INA	+57N	−1B	+27N	+15B	=14N	−3B	−18N	+47B	+25N	5.5	43.0	45.0	22.25	1601	+4.4
14	Wong, Ngo Athan	1495	HKG	−5B	+54N	+62B	+38N	=13B	+8B	=10N	=11B	−2N	5.5	42.0	43.0	21.25	1785	+85.2
15	Chu, Wa Ching David	1500	SGP	+51N	=8B	=20N	−13N	+50B	+22B	−11N	+19B	=30N	5.5	39.5	42.0	23.25	1626	+45.2
16	Chongstitwattana, Cholapat	1577	THA	+23N	−11B	=33N	+55B	−8N	+25B	+26B	F	+27N	5.5	36.0	36.0	22.50	1657	+12.8
17	Osterhus, Omar Torbjorn	1650	DEN	+52N	+53B	=35B	−10N	=42B	=32N	+39B	−5N	+40B	5.5	33.0	35.5	17.75	1606	-9.4
18	Lisin, Maksim	1572	RUS	+48B	−10N	+40B	+36N	−5B	=42N	+13B	=8B	−9N	5.0	40.5	43.5	20.75	1663	+23.6
19	Njio, Jeroen	1571	NED	−2N	+52B	+56N	+35B	−6B	+24N	−12B	−15N	+33B	5.0	39.5	41.5	17.00	1584	+2.4
20	Khoonmee, Yoodthana	1591	THA	+54B	−5N	=15B	+28N	+39B	−12N	=32B	−35B	+34N	5.0	37.5	39.5	18.75	1549	-21.6
21	Siripatvanich, Nonglak	1579	THA	+34B	−7N	+41B	=39N	−3N	+27B	=35N	−23B	+42B	5.0	37.0	40.5	19.25	1628	+8.6
22	Sheridan, Wallace	1569	AUS	+45B	−4N	=25B	=37N	+33B	−15N	+50B	=40N	=32B	5.0	35.5	38.5	18.50	1450	-23.8
23	Damraks, Teeravee	0	THA	−16B	−41N	−47B	+54N	+60B	+33N	+24B	+21N	−8N	5.0	33.5	34.5	16.50	1470	0.0
24	Masangkay, Jecelle Duane	1514	PHI	+31N	−3B	+9N	+26N	−4B	−19B	−23N	=44B	+47N	4.5	41.5	44.5	19.75	1577	+18.4
25	Laogumnerd, Kritpithak	1409	THA	−3N	+31B	=22N	−30B	+49N	−16N	+28B	+39N	−13B	4.5	39.5	42.5	18.00	1466	+16.8
26	Wongrung, Intouch	1752	THA	+37N	+29B	−11N	−24B	=30N	+47B	−16N	−9B	+44N	4.5	38.0	41.0	17.25	1549	-67.6
27	Chimyam, Jakkawan	1474	THA	−7B	+34N	−13B	+48N	+36B	−21N	+51B	=32N	−16B	4.5	37.0	39.5	15.50	1259	-21.8
28	Chao, Andrew Tzu Chun	1454	TPE	−6N	=44B	+45N	−20B	−9N	+49B	−25N	+53B	+48N	4.5	35.0	37.5	13.75	799	-40.0
29	Kevrukh, Vsevolod	1554	RUS	+36B	−26N	+60B	−5N	−40B	−34N	+45N	+48B	=37N	4.5	33.0	34.0	13.50	1314	-48.0
30	Sriraksa, Phongkit	1555	THA	F	F	=50B	+25N	=26B	−40N	+34B	+36N	=15B	4.5	29.0	29.0	19.00	1521	-4.2
31	Ngai, Tsz Yiu Ethan	0	HKG	−24B	−25N	+54B	−40N	−48B	=43N	+52N	+56B	+39B	4.5	27.0	29.0	11.75	1259	0.0
32	Ferrie, Peter	1516	ENG	+61B	F	−6N	−4N	+37B	=17B	=20N	=27B	=22N	4.0	38.0	38.0	15.00	1560	+6.4
33	Uapongkitikul, Pavatt	1463	THA	−10B	+48N	=16B	=50N	−22N	−23B	+55N	+51B	−19N	4.0	34.5	36.5	11.75	1312	-26.0
34	Chin, Alice	0	MAS	−21N	−27B	+51N	+53B	−35N	+29B	−30N	+46N	−20B	4.0	33.5	36.0	13.00	1379	0.0
35	Pinphetsawan, Sirikwan	1500	THA	+55B	F	=17N	−19N	+34B	F	=21B	+20N	−7B	4.0	32.5	32.5	16.25	1579	+8.6
36	Khuijanthuek, Kannika	0	THA	−29N	+59B	+46N	−18B	−27N	+56B	+37N	−30B	−38N	4.0	32.0	34.0	11.50	1425	0.0
37	Lisin, Sergey	1415	RUS	−26B	F	+44N	=22B	−32N	+48N	−36B	+43N	=29B	4.0	32.0	32.0	14.75	1406	-3.2
38	Asvahem, Peerathat	1564	THA	+44N	−6B	+58N	−14B	+56N	−9B	F	F	+36B	4.0	29.5	29.5	11.50	845	-32.4
39	Leong, Khai Ling	1489	MAS	−1N	+57B	+53N	=21B	−20N	+62B	−17N	−25B	−31N	3.5	37.5	38.5	8.00	1253	-48.4
40	Wongbunchailert, Rawat	1421	THA	F	F	−18N	+31B	+29N	+30B	−8N	=22B	−17N	3.5	35.0	35.0	16.00	1537	+17.0
41	Yodpijit, Vincent Tho	1468	THA	−11N	+23B	−21N	−9B	=55N	=45B	=53N	=49B	=51N	3.5	33.0	35.0	11.75	912	-17.6
42	Louwakul, Phuwin	1547	THA	+9N	−12B	=55N	+49B	=17N	=18B	F	F	−21N	3.5	32.0	32.0	15.25	1446	-14.0
43	FIDE 6018408	0	—	=46N	−2B	−59N	=44B	=52N	=31B	+58N	−37B	=49N	3.5	30.0	32.0	10.50	1184	0.0
44	Kaveevorayan, Nichakarn	0	THA	−38B	=28N	−37B	=43N	−51B	+54B	+56N	=24N	−26B	3.5	29.5	31.5	10.25	1295	0.0
45	Hsieh, Yi-Li	0	TPE	−22N	F	−28B	+46B	−47N	=41N	−29B	+58B	+55N	3.5	28.0	28.0	9.25	1300	0.0
46	Emery, Jacob James	1505	ESP	=43B	−49N	−36B	−45N	+53N	+52B	−47N	−34B	+54N	3.5	26.0	28.0	8.75	605	-25.6
47	Aadhya Krishnavajjala	1417	IND	−12N	−9B	+23N	F	+45B	−26N	+46B	−13N	−24B	3.0	38.0	38.0	12.00	1378	-8.8
48	Darasidh, Bheerada	0	THA	−18N	−33B	+52N	−27B	+31N	−37B	+62N	−29N	−28B	3.0	33.5	34.5	8.00	689	0.0
49	Kittisiripan, Sarocha	0	THA	F	+46B	−8N	−42N	−25B	−28N	+60B	=41N	=43B	3.0	30.0	30.0	8.00	1309	0.0
50	Chaoveeraprasit, Chayapol	0	THA	−8N	+51B	=30N	=33B	−15N	+55B	−22N	F	F	3.0	29.5	29.5	8.75	1309	0.0
51	Phanthajarunithi, Napat	0	THA	−15B	−50N	−34B	F	+44N	+58B	−27N	−33N	=41B	2.5	30.0	30.0	7.25	1154	0.0
52	Chen, Yanxi Lolly	0	FID	−17B	−19N	−48B	+57N	=43B	−46N	−31B	+61N	−53N	2.5	29.5	30.5	4.75	776	0.0
53	Rissone, Edoardo	0	ITA	F	−17N	−39B	−34N	−46B	+61N	=41B	−28N	+52B	2.5	28.0	28.0	5.25	1147	0.0
54	FIDE 343099799	0	—	−20N	−14B	−31N	−23B	=57B	−44N	+61B	=60N	−46B	2.0	30.0	31.0	2.50	730	0.0
55	Punbua, Naphapach	0	THA	−35N	F	=42B	−16N	=41B	−50N	−33B	+57N	−45B	2.0	29.0	29.0	5.50	1265	0.0
56	FIDE 6214843	0	—	−?B	+61N	−19B	+60N	−38B	−36N	−44B	−31N	−57B	2.0	25.0	25.0	2.00	800	0.0
57	Chen, Zeming	0	FID	−13B	−39N	−61B	−52B	=54N	=60N	F	−55B	+56N	2.0	19.5	19.5	3.50	738	0.0
58	Botkate, Chanaporn	0	THA	F	F	−38B	−62N	+61B	−51N	−43B	−45N	+60B	2.0	16.5	16.5	2.00	764	0.0
59	Vasanthakumar N	1451	IND	−4B	−36N	+43B	+61N	F	F	F	F	F	2.0	15.0	15.0	4.50	976	-2.6
60	Pengsee, Pemika	0	THA	F	F	−29N	−56B	−23N	=57B	−49N	=54B	−58N	1.0	20.5	20.5	2.00	756	0.0
61	Laogumnerd, Kornnapong	0	THA	−32N	−56B	+57N	−59B	−58N	−53B	−54N	−52B	F	1.0	19.0	19.0	2.00	684	0.0
62	Rojjanaburanon, Jomkwan	0	THA	F	F	−14N	+58B	F	−39N	−48B	F	F	1.0	14.0	14.0	2.00	690	0.0

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers

1Wong, Ngo AthanHKG
+85.2
5.5 pts · #18
2Chu, Wa Ching DavidSGP
+45.2
5.5 pts · #14
3Shubham ShuklaIND
+42.4
8.5 pts · #1

Top rating losers

1Wongrung, IntouchTHA
-67.6
4.5 pts · #15
2Leong, Khai LingMAS
-48.4
3.5 pts · #44
3Kevrukh, VsevolodRUS
-48.0
4.5 pts · #46

Biggest upsets

R7+245 Elo gap
N. Tarun1742 beat Bartolome, Remark1987
R4+238 Elo gap
Masangkay, Jecelle Duane1514 beat Wongrung, Intouch1752
R3+234 Elo gap
Shibin K Benny1753 beat Bartolome, Remark1987