2025 CTCA International Chess Open-Open U19GU19U17GU17

SwissStandard

77 players participated in this 9-round tournament, held from 16 Jul 2025 to 23 Jul 2025 in Taoyuan, Chinese Taipei. 15 titled players from 8 federations. Top 10 Elo average was 2259, and top seed was Sayantan Das (🇮🇳 IND, GM, 2434).

Sayantan Das (🇮🇳 IND, GM, 2434) won with 7.5/9, ahead of Sander Severino (7.0) and Gergely Aczel (6.5). Das shared the lead from round 5 and won solo starting round 8.

The biggest upset came in round 5: Chen- Hao Wu (1678) beat Diajeng Theresa Singgih (WIM, 2116), a +438-point gap.

Location

🇹🇼Taoyuan, Chinese Taipei

Dates

16 Jul 2025 → 23 Jul 2025

Time control

Standard: 90 minutes for game with 30 seconds delay from move 1

System

Swiss · 9 rounds

Top seed

🇮🇳GMSayantan Das2434

Avg top 10

2,259

Participants

Titled players · 15

GM×3

IM×2

FM×2

CM×1

WGM×1

WIM×2

WFM×2

WCM×2

Federations · 8 represented

🇵🇭Philippines×28

🇹🇼Chinese Taipei×26

🇰🇷South Korea×5

🇺🇸United States of America×3

🇸🇬Singapore×3

🇭🇰Hong Kong China×2

🇦🇺Australia×2

🇮🇳India×2

Top 3

🥇
GMSayantan Das
🇮🇳IND·2434
7.5pts·2457perf+4.5
🥈
FMSander Severino
🇵🇭PHI·2349
7.0pts·2372perf+5.9
🥉
GMGergely Aczel
🇭🇺HUN·2420
6.5pts·2357perf-2.8

How it unfolded

Top 6 · 9 rounds

GM Sayantan Das led from R8; +0.5-point edge over the runner-up. Title race converged from 2 co-leaders at R4 to 1 by R8.

Co-leaders

Das7.5Severino7Bernardo6.5Aczel6.5Rom6.5Garcia-Ruiz Fuentes6.5

R8–R9 · LEAD HELD

GM Sayantan Das held the sole lead from R8 through R9 without losing it.

R6 · HEAD-TO-HEAD · WINNER VS 2ND

GM Sayantan Das drew with FM Sander Severino (White).

R1–R4 · WIN STREAK

FM Sander Severino won 4 in a row (R1–R4).

Key matchups · top 4

Head-to-head between the four finishers

Player	1	2	3	4
1GMSayantan Das	*	½	—	½
2FMSander Severino	½	*	—	½
3Darry Bernardo	—	—	*	0
4GMGergely Aczel	½	½	1	*

Grille américaine

#	Player	Elo	Fed	R1	R2	R3	R4	R5	R6	R7	R8	R9	Pts	Bu C1	Bu	SB	Perf	Δ
1	Das, SayantanGM	2434	IND	+28B	+27N	=19B	+38N	+9B	=2B	+4N	+5B	=3N	7.5	48.0	52.5	43.00	2457	+4.5
2	Severino, SanderFM	2349	PHI	+39N	+17B	+15N	+16B	=3B	=1N	=8B	+9N	=4N	7.0	49.5	54.0	40.75	2372	+5.9
3	Aczel, GergelyGM	2420	HUN	+51N	+11B	+6N	+10B	=2N	=4B	−5N	+18N	=1B	6.5	51.5	55.5	38.50	2357	-2.8
4	Antonio, Rogelio JrGM	2354	PHI	+48B	+22N	+12B	=9N	+8B	=3N	−1B	+17N	=2B	6.5	50.0	54.0	36.75	2330	+1.2
5	Rom, Jasper	2163	PHI	+32B	+40N	+20B	−8N	+22B	+16N	+3B	−1N	=7B	6.5	48.0	52.5	35.75	2159	+8.4
6	Bernardo, Darry	2018	PHI	+76B	+37N	−3B	+40N	+17B	=10B	=21N	=8N	+18B	6.5	44.0	45.5	30.25	2145	+31.4
7	Garcia-Ruiz Fuentes, Aitor	2006	ESP	+73N	+47B	−10N	=13B	+35N	=26B	+24N	+14B	=5N	6.5	43.5	46.0	31.25	2041	+12.8
8	Zhang, JilinWGM	2184	AUS	+55N	+14B	=36N	+5B	−4N	+15B	=2N	=6B	=11N	6.0	49.0	52.5	34.00	2154	-1.2
9	Abelgas, RoelFM	2148	PHI	+67N	+35B	+34N	=4B	−1N	+36B	+11N	−2B	=10N	6.0	46.5	49.5	28.75	2187	+15.4
10	Nanjo, RyosukeIM	2341	JPN	+58B	+29N	+7B	−3N	+27B	=6N	−18B	+36N	=9B	6.0	45.5	49.0	30.75	2167	-14.4
11	Subaste, Arman	1904	PHI	+71B	−3N	+58B	=20N	+34B	+12N	−9B	+21N	=8B	6.0	43.5	46.0	27.75	2053	+29.8
12	Wang, DanielCM	2076	AUS	+52N	+13B	−4N	+46B	=36N	−11B	=23N	+16B	+29N	6.0	43.0	47.0	29.50	1965	-36.4
13	Wu, Pei-Ti	1718	TPE	+42B	−12N	+63B	=7N	=14B	=27N	=15N	+46B	+26N	6.0	43.0	46.5	28.75	1995	+48.2
14	Huang,Hsuan-Chen	1738	TPE	+61B	−8N	+54B	=26B	=13N	+19N	+22B	−7N	+27B	6.0	43.0	46.5	28.50	2021	+47.8
15	Infiesto, James	1978	PHI	+62B	+54N	−2B	=34N	+38B	−8N	=13B	+30N	+28B	6.0	41.5	45.0	26.75	1924	-8.2
16	Wu, Chen- Hao	1678	TPE	+65B	+21N	+43B	−2N	+19B	−5B	=26N	−12N	+35B	5.5	44.5	47.5	25.50	2018	+123.6
17	Aguilera, Felix	1833	PHI	+60N	−2N	+32B	+66B	−6N	+37N	+29B	−4B	=19N	5.5	43.5	46.5	23.75	1936	+14.8
18	Redor, Menandro	2021	PHI	+72N	−34B	+51N	=35B	+23N	+20B	+10N	−3B	−6N	5.5	43.0	45.5	25.75	1960	-9.0
19	Singgih, Diajeng TheresaWIM	2116	INA	+74B	+30N	=1N	=36B	−16N	−14B	+50N	+47B	=17B	5.5	42.0	44.0	23.75	1893	-36.0
20	Rhinehart, Zachary	1697	USA	+66N	+26B	−5N	=11B	+46N	−18N	=35B	=24B	+47N	5.5	41.0	44.0	24.00	1940	+94.8
21	Bagamasbad, EfrenIM	1976	PHI	+50N	−16B	−39N	+41N	+48B	+40N	=6B	−11B	+34N	5.5	40.0	44.0	24.75	1747	-36.8
22	Fang, KunWFM	1845	SGP	+69N	−4B	+72N	+39B	−5N	+47B	−14N	+51B	=23N	5.5	39.5	42.0	20.25	1826	-4.2
23	Hsu, Che	1722	TPE	=41B	−49N	+59B	+56N	−18B	+31N	=12B	+37N	=22B	5.5	38.5	42.0	24.50	1934	+52.4
24	Park, HaneulWCM	1831	KOR	−54B	+50N	=56B	=48N	+31B	+28N	−7B	=20N	+38B	5.5	38.0	41.5	25.00	1856	+7.6
25	Saguban, Cayetano Jr?	0	PHI	−37B	+62N	+30B	−29N	−28B	+71N	+48B	=35N	+36B	5.5	36.0	38.5	21.75	1708	0.0
26	Lopez, Henry	2050	PHI	+68B	−20N	+28B	=14N	+29B	=7N	=16B	=27N	−13B	5.0	44.5	47.5	24.50	1800	-49.0
27	Mordido, Kylen JoyWIM	1927	PHI	+57N	−1B	+55N	+47B	−10N	=13B	+34N	=26B	−14N	5.0	42.5	46.0	21.00	1891	-9.6
28	Saguban, Dave Trevor	1665	PHI	−1N	+57B	−26N	+61B	+25N	−24B	+65N	+43B	−15N	5.0	41.0	44.0	20.00	1692	+0.4
29	Peligro, Israel	1739	PHI	+70N	−10B	+53N	+25B	−26N	+33B	−17N	+49B	−12B	5.0	41.0	43.5	21.00	1225	-14.2
30	Yang, Yuchang	1715	USA	+44N	−19B	−25N	+69B	=53N	+39B	=46N	−15B	+49N	5.0	38.0	40.5	19.50	1786	+8.0
31	Ng, Jing Xuan Alyssa	1678	SGP	=45N	+59B	−46N	+49B	−24N	−23B	+69N	=42B	+48N	5.0	35.5	38.0	18.50	1561	-24.0
32	Abogado, Anthony	1547	PHI	−5N	+70B	−17N	−44B	=69N	+45B	=53N	+65B	+46N	5.0	34.5	37.0	17.25	1739	+26.0
33	Liu, Owen YC	0	TPE	−34N	=52B	=69N	+72B	+?N	−29N	−37B	+50B	+51N	5.0	31.0	31.0	13.75	1637	0.0
34	Chen, Yung-Hao	1707	TPE	+33B	+18N	−9B	=15B	−11N	+43N	−27B	+41N	−21B	4.5	43.5	48.0	22.50	1848	+40.4
35	Mendoza, Cheyzer Crystal J.	1734	PHI	+64B	−9N	+42B	=18N	−7B	+41N	=20N	=25B	−16N	4.5	43.5	47.0	20.75	1667	-10.8
36	Wang, Yu Sen	1929	TPE	+56B	+63N	=8B	=19N	=12B	−9N	+38B	−10B	−25N	4.5	43.0	46.5	20.25	2038	+27.2
37	Choi, Chanuk	1689	KOR	+25N	−6B	−66N	+60B	+45N	−17B	+33N	−23B	=42N	4.5	40.5	43.5	20.75	1058	-36.0
38	Chen, I-ChenWFM	1718	TPE	=77N	+45B	+49N	−1B	−15N	+53B	−36N	+54B	−24N	4.5	39.5	40.0	16.25	1164	-16.6
39	Pu, Yu	1582	TPE	−2B	+61N	+21B	−22N	=43B	−30N	−41B	+69N	+70N	4.5	38.0	40.5	16.25	1694	+24.8
40	Ching, Francis	1724	PHI	+53N	−5B	+44N	−6B	+66N	−21B	−49N	=70B	+54N	4.5	37.5	40.0	16.25	1239	-8.4
41	Lee, Boram	0	KOR	=23N	−46B	+52N	−21B	+55N	−35B	+39N	−34B	+60N	4.5	36.0	39.5	18.25	1656	0.0
42	Lee, Po-Yen	0	USA	−13N	+67B	−35N	=55B	=50N	=57B	+52N	=31N	=37B	4.5	35.0	38.0	17.25	1628	0.0
43	Lee, Onbin	1735	KOR	=59N	+77B	−16N	=45B	=39N	−34B	+57N	−28N	+61B	4.5	34.5	35.0	13.75	1330	-39.0
44	Leem, Daeyoung	0	KOR	−30B	+68N	−40B	+32N	−47N	−50B	=60N	+55B	+57N	4.5	33.0	36.0	16.75	1618	0.0
45	Wei Yi-Chen	0	TPE	=31B	−38N	+74B	=43N	−37B	−32N	=71B	+62N	+56B	4.5	33.0	35.0	15.00	1558	0.0
46	Murray, Tristan Alexander	1836	TPE	=49B	+41N	+31B	−12N	−20B	+65N	=30B	−13N	−32B	4.0	41.0	44.0	17.00	1541	-92.4
47	Mooi, Kok Onn Osric	1693	SGP	+75B	−7N	+65B	−27N	+44B	−22N	+56B	−19N	−20B	4.0	39.0	41.0	13.00	1114	-24.6
48	Bilog, Cecilio	1623	PHI	−4N	=69B	+77N	=24B	−21N	+60B	−25N	+59N	−31B	4.0	37.5	38.0	11.50	1555	-6.8
49	Hsia, Ho-Hsuan	0	TPE	=46N	+23B	−38B	−31N	=56B	+?N	+40B	−29N	−30B	4.0	37.0	37.0	13.75	1685	0.0
50	Yen, Yu-Ting	0	TPE	−21B	−24B	+70N	=63N	=42B	+44N	−19B	−33N	+75B	4.0	36.5	38.5	13.00	1175	0.0
51	Wong, Linda JaneWCM	1660	TPE	−3B	+71N	−18B	+64N	−65B	+70N	+61B	−22N	−33B	4.0	35.0	37.5	12.00	1175	-8.8
52	Nacita, Jean-lee	1493	PHI	−12B	=33N	−41B	=59N	=54B	+64N	−42B	=75N	+66B	4.0	33.5	35.5	13.50	1093	-1.6
53	Lau, Ching Yu Ted	0	HKG	−40B	+74N	−29B	+58N	=30B	−38N	=32B	=56N	=?N	4.0	33.0	33.0	12.25	1605	0.0
54	Hsu, Che-Chi	0	TPE	+24N	−15B	−14N	−?B	=52N	+72B	+55N	−38N	−40B	3.5	36.5	36.5	13.50	1611	0.0
55	Angot, Cheryl A.	1564	PHI	−8B	+64N	−27B	=42N	−41B	+63N	−54B	−44N	+69B	3.5	35.0	37.5	11.75	1146	-3.6
56	Chang, Chung Min	0	TPE	−36N	+?B	=24N	−23B	=49N	+66B	−47N	=53B	−45N	3.5	35.0	35.0	9.75	1624	0.0
57	Chen, Isaac H	0	TPE	−27B	−28N	+76B	−65N	+59B	=42N	−43B	+64N	−44B	3.5	33.5	35.0	10.75	1500	0.0
58	Vaibhav Chopra	1572	IND	−10N	+60B	−11N	−53B	+63B	−61N	−70B	+68N	=59B	3.5	33.0	35.5	11.75	1663	+7.6
59	Keng, Po-Wen	0	TPE	=43B	−31N	−23N	=52B	−57N	+73B	+67N	−48B	=58N	3.5	33.0	35.5	11.50	1554	0.0
60	Hsieh, Min-Han	0	TPE	−17B	−58N	+62B	−37N	+74B	−48N	=44B	+71N	−41B	3.5	32.5	34.5	10.25	1481	0.0
61	Hung, Chia-Chien	0	TPE	−14N	−39B	+67N	−28N	+76B	+58B	−51N	=?B	−43N	3.5	32.0	32.0	8.00	1540	0.0
62	Bilog, Maria Teresa	1410	PHI	−15N	−25B	−60N	=67B	+77N	−69B	+74N	−45B	+65N	3.5	30.0	30.5	7.00	1611	+27.6
63	Shiu, Bo-Shiun	0	TPE	+?N	−36B	−13N	=50B	−58N	−55B	−64B	+76N	+71B	3.5	29.0	29.0	6.00	1528	0.0
64	Lai, Heng-Chia	0	TPE	−35N	−55B	+73N	−51B	=67N	−52B	+63N	−57B	+72N	3.5	28.5	31.0	10.00	1453	0.0
65	Yu, Bowen	0	HKG	−16N	+73B	−47N	+57B	+51N	−46B	−28B	−32N	−62B	3.0	34.5	37.0	10.00	1420	0.0
66	Mangawang, Ma. Katrina	0	PHI	−20B	+76N	+37B	−17N	−40B	−56N	−?B	+67B	−52N	3.0	32.0	32.0	9.00	1549	0.0
67	Mangayayam, Fe	1516	PHI	−9B	−42N	−61B	=62N	=64B	+74N	−59B	−66N	+77B	3.0	29.5	30.0	6.00	1611	+10.8
68	CHANG TIN IENG	1489	MAC	−26N	−44B	F	F	=73N	+77B	=75N	−58B	+74N	3.0	20.0	20.0	4.75	1515	-0.4
69	Hong, Tsai-Lung	0	TPE	−22B	=48N	=33B	−30N	=32B	+62N	−31B	−39B	−55N	2.5	37.5	41.0	10.50	1421	0.0
70	Huang, Morris	0	TPE	−29B	−32N	−50B	F	+72N	−51B	+58N	=40N	−39B	2.5	33.0	33.0	8.25	1505	0.0
71	Cheng, Yi-Yen	0	TPE	−11N	−51B	−?N	+73B	+75N	−25B	=45N	−60B	−63N	2.5	31.5	31.5	6.75	1480	0.0
72	Lucero, Corazon	1479	PHI	−18B	+75N	−22B	−33N	−70B	−54N	=76B	+73N	−64B	2.5	30.0	31.5	5.25	1565	+8.4
73	Lee, Chien-Hua	1437	TPE	−7B	−65N	−64B	−71N	=68B	−59N	+77B	−72B	+76N	2.5	26.0	26.5	3.50	1476	+2.4
74	Gamao, evangeline	1508	PHI	−19N	−53B	−45N	+75B	−60N	−67B	−62B	+77N	−68B	2.0	29.0	29.5	2.50	781	-69.2
75	Peligro, Elena	0	PHI	−47N	−72B	F	−74N	−71B	+76N	=68B	=52B	−50N	2.0	23.5	23.5	5.00	1393	0.0
76	Tonic,Charmaine	1445	PHI	−6N	−66B	−57N	+77B	−61N	−75B	=72N	−63B	−73B	1.5	27.0	27.5	1.75	1314	-21.6
77	FIDE 16306252	0	—	=38B	−43N	−48B	−76N	−62B	−68N	−73N	−74B	−67N	0.5	27.0	28.5	2.25	1098	0.0

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers

1Wu, Chen- HaoTPE
+123.6
5.5 pts · #16
2Rhinehart, ZacharyUSA
+94.8
5.5 pts · #18
3Hsu, CheTPE
+52.4
5.5 pts · #38

Top rating losers

1Murray, Tristan AlexanderTPE
-92.4
4.0 pts · #53
2Gamao, evangelinePHI
-69.2
2.0 pts · #72
3Lopez, HenryPHI
-49.0
5.0 pts · #15

Biggest upsets

R5+438 Elo gap
Wu, Chen- Hao1678 beat WIMSinggih, Diajeng Theresa2116
R3+394 Elo gap
Pu, Yu1582 beat IMBagamasbad, Efren1976
R6+378 Elo gap
Huang,Hsuan-Chen1738 beat WIMSinggih, Diajeng Theresa2116