8th AQ Prime Standard Open Chess Tournament

Open SwissStandard

66 players participated in this 6-round tournament, held from 11 Oct 2025 to 12 Oct 2025 in Pasig City, Philippines. 6 titled players from 5 federations. Top 10 Elo average was 2090, and top seed was Milan Pacher (🇸🇰 SVK, GM, 2368).

VInce Angelo Medina (🇵🇭 PHI, 2138) won with 5.5/6, ahead of Christopher Castellano (5.5) and Milan Pacher (5.0). Medina shared the lead from round 1, winning on tie-break.

The biggest upset came in round 4: John Laurence Donguines (1717) beat Ahmed M Alghamdi (CM, 2089), a +372-point gap.

Location

🇵🇭Pasig City, Philippines

Dates

11 Oct 2025 → 12 Oct 2025

Time control

Standard: 60 minutes with 30 seconds increment from move 1

System

Swiss · 6 rounds

Top seed

🇸🇰GMMilan Pacher2368

Avg top 10

2,090

Participants

Titled players · 6

GM×1

IM×1

FM×3

CM×1

Federations · 5 represented

🇵🇭Philippines×60

FIDE (no federation)×2

🇸🇦Saudi Arabia×1

🇮🇳India×1

🇸🇰Slovakia×1

Top 3

🥇
VInce Angelo Medina
🇵🇭PHI·2138
5.5pts·2328perf+21.0
🥈
FMChristopher Castellano
🇵🇭PHI·2098
5.5pts·2290perf+23.4
🥉
GMMilan Pacher
🇸🇰SVK·2368
5.0pts·2293perf-2.8

How it unfolded

Top 6 · 6 rounds

Tight race until R6; 2 players tied at 5.5/6, decided on Buchholz. Title race narrowed from 3 co-leaders at R4 to 2 at the finish.

Co-leaders

Castellano5.5Medina5.5Baylosis5Pacher5Bancod4.5Reyes4.5

R6 · TIEBREAK CLUSTER

2 players finish on 5.5/6. Medina takes the title on Buchholz Cut1 (20.0).

R6 · HEAD-TO-HEAD · WINNER VS 2ND

FM Christopher Castellano drew with VInce Angelo Medina (White).

WIN STREAKS · 2 top finishers

FM Christopher Castellano 5 wins (R1–R5)VInce Angelo Medina 5 wins (R1–R5)

Key matchups · top 4

Head-to-head between the four finishers

Player	1	2	3	4
1FMChristopher Castellano	*	½	—	—
2VInce Angelo Medina	½	*	—	1
3Daniel Baylosis	—	—	*	—
4GMMilan Pacher	—	0	—	*

Grille américaine

#	Player	Elo	Fed	R1	R2	R3	R4	R5	R6	Pts	Bu C1	Bu	SB	Perf	Δ
1	Medina, VInce Angelo	2138	PHI	+49N	+26B	+7N	+38B	+3B	=2N	5.5	20.0	21.5	18.75	2328	+21.0
2	Castellano, ChristopherFM	2098	PHI	+56N	+25B	+27N	+33B	+6N	=1B	5.5	18.5	19.5	16.75	2290	+23.4
3	Pacher, MilanGM	2368	SVK	+28N	+21B	+10N	+5B	−1N	+12B	5.0	21.5	24.5	19.00	2293	-2.8
4	Baylosis, Daniel	1861	PHI	+32B	=6N	+29B	=19N	+13B	+10N	5.0	19.0	22.0	18.00	1988	+35.6
5	Bancod, RonaldIM	2112	PHI	+14B	+9N	+23B	−3N	+21B	=8N	4.5	21.5	25.0	17.75	2084	0.0
6	Donguines, John Laurence	1717	PHI	+65N	=4B	+47N	+11B	−2B	+23N	4.5	19.5	19.5	11.50	2115	+98.0
7	Quinto, Stephen Zane	1832	PHI	+42B	+59N	−1B	+14N	=19B	+24N	4.5	18.5	19.5	12.25	1896	+21.2
8	Reyes, Einnar Marc	1867	PHI	=20N	+60B	+35N	=22B	+36N	=5B	4.5	16.5	17.5	11.75	1926	+20.0
9	Cartagena, Philip King	1790	PHI	+40N	−5B	=39N	+20B	+38N	+19B	4.5	15.5	17.5	12.00	1853	+16.8
10	Manzanero, Stephen	1954	PHI	+62N	+41B	−3B	+17N	+25N	−4B	4.0	19.0	19.5	9.50	1974	+5.6
11	Alghamdi, Ahmed MCM	2089	KSA	+13B	+17N	−38B	−6N	+31B	+29N	4.0	18.5	20.5	14.00	1951	-10.6
12	Ochoa, Kyle	1899	PHI	F	+34B	+31N	+26B	+22N	−3N	4.0	17.0	19.0	12.00	2054	+28.4
13	De Guzman, Ioan Samuel	1636	PHI	−11N	+55B	+45N	+27B	−4N	+25B	4.0	17.0	18.0	9.00	1857	+54.4
14	Legaspina, John Miguel	1651	PHI	−5N	+40B	+37N	−7B	+63N	+26B	4.0	16.5	16.5	7.50	1787	+24.4
15	Talaboc, Francis	1850	PHI	+51N	+16B	−33N	−25B	+46N	+41B	4.0	13.5	15.0	9.50	1897	+6.2
16	Young, Lord Yofiel	1712	PHI	+64B	−15N	+54B	−30N	+43B	+27N	4.0	13.0	13.0	6.00	1827	+29.2
17	Faeldonia, Jerick	1767	PHI	+55N	−11B	+51N	−10B	+54N	+38B	4.0	12.5	13.5	5.50	1797	+9.2
18	Lait, Vladimir	1792	PHI	+48N	−33B	+46N	−36B	+42N	+28B	4.0	12.0	13.5	8.50	1806	+1.8
19	Penafiel, Denniel	1687	PHI	=34N	+57B	+58N	=4B	=7N	−9N	3.5	17.5	18.5	8.00	1820	+28.4
20	Borden, Mark Jayson Jr	1615	PHI	=8B	−29N	+34B	−9N	+50B	+48N	3.5	16.0	17.5	7.75	1627	0.0
21	Carnese, Edwin	1790	PHI	+52B	−3N	+62B	+43N	−5N	=36B	3.5	15.5	16.0	5.25	1805	+3.2
22	Maranan, Junsen Audric	1734	PHI	+63N	=47B	+30B	=8N	−12B	=37N	3.5	15.5	15.5	7.25	1946	+21.2
23	Miranda, Jin Clark Myco	1818	PHI	+66N	+39B	−5N	+41B	=33N	−6B	3.5	15.5	15.5	5.25	1885	+18.0
24	Miranda, Algene Washington	1479	PHI	−26N	+49B	=28N	+35B	+44N	−7B	3.5	15.0	16.5	7.50	1777	+90.4
25	Tambong, Angel Jr.	1755	PHI	+37B	−2N	+42B	+15N	−10B	−13N	3.0	20.0	22.0	8.50	1750	-5.2
26	Tolosa, Christian	1776	PHI	+24B	−1N	+32B	−12N	+66B	−14N	3.0	20.0	20.0	6.50	1724	-17.6
27	Barbosa, Emmanuel	1804	PHI	+54B	+43N	−2B	−13N	+39N	−16B	3.0	17.5	18.5	5.00	1688	-18.0
28	Bobias, Chariza	1663	PHI	−3B	+52N	=24B	+48N	=30B	−18N	3.0	17.0	18.5	6.25	1733	+6.8
29	Lomio, John Marcus	1693	PHI	=57N	+20B	−4N	=39B	+40N	−11B	3.0	16.5	17.5	7.00	1734	+6.8
30	Romera, Jeffrey	2054	PHI	+31N	=35B	−22N	+16B	=28N	F	3.0	16.0	16.0	9.75	1772	-29.0
31	Francisco, French Cobi	1636	PHI	−30B	+50N	−12B	+55N	−11N	+40B	3.0	14.5	15.5	4.50	1713	+9.6
32	Cruz, Alvin	1603	PHI	−4N	+65B	−26N	+45B	−41N	+63B	3.0	12.0	12.0	2.00	990	-31.2
33	Nouri, AlekhineFM	2223	PHI	F	+18N	+15B	−2N	=23B	F	2.5	19.0	19.0	9.75	1993	-18.2
34	Pascual, Tom Jacob	0	PHI	=19B	−12N	−20N	+61B	−35N	+51B	2.5	15.0	16.0	4.25	1554	0.0
35	Pasno, Aldrin	1735	PHI	+50B	=30N	−8B	−24N	+34B	F	2.5	15.0	15.0	5.50	1527	-15.2
36	Almadin, Jan Yuniko	1522	PHI	−58N	F	+59B	+18N	−8B	=21N	2.5	14.0	14.0	6.75	1788	+64.0
37	Antonio, Elaine Grace	0	PHI	−25N	+56B	−14B	+62N	F	=22B	2.5	13.0	13.5	3.25	1683	0.0
38	Villaruz, Willy	0	PHI	F	+58B	+11N	−1N	−9B	−17N	2.0	19.0	19.0	5.00	1844	0.0
39	Utkarsh Ujjwal Jha	1618	IND	F	−23N	=9B	=29N	−27B	+55N	2.0	18.0	19.0	4.75	1642	+5.2
40	Ong, Clarence	1488	PHI	−9B	−14N	+64B	+56N	−29B	−31N	2.0	15.5	15.5	1.00	1444	-10.4
41	Barrameda, Remyr	1732	PHI	F	−10N	+66B	−23N	+32B	−15N	2.0	14.5	14.5	3.00	1688	-12.8
42	Lopez, Alden Carl	1573	PHI	−7N	+61B	−25N	F	−18B	+64N	2.0	13.5	13.5	1.00	993	-26.4
43	Gacutan, Zyluj Ezekiel	1531	PHI	F	−27B	+60N	−21B	−16N	+59B	2.0	12.5	12.5	2.00	1664	+32.0
44	Aguilar, Christian Aaron	1661	PHI	F	=48B	+57N	F	−24B	=49N	2.0	10.5	11.5	2.50	1421	-38.4
45	Pedrasa, Joel Peter	0	PHI	−60N	F	−13B	−32N	+56B	+54B	2.0	10.0	10.0	2.00	1548	0.0
46	Pasno, Albert	1632	FID	−47N	+63B	−18B	+65N	−15B	F	2.0	9.5	9.5	0.00	1069	-25.2
47	Pacis, AdrianFM	1964	PHI	+46B	=22N	−6B	F	F	F	1.5	14.5	14.5	3.75	1694	-19.6
48	Decasa Basilio, Lionel	1505	PHI	−18B	=44N	F	−28B	+52N	−20B	1.5	14.0	14.0	2.50	1499	-3.6
49	Acebedo, Lanz Arpil Jhay	1653	PHI	−1B	−24N	−50B	F	+57N	=44B	1.5	13.5	13.5	2.00	1458	-32.0
50	Bay-Ag, Navhee	0	PHI	−35N	−31B	+49N	=57B	−20N	−53B	1.5	12.0	13.0	2.00	1436	0.0
51	Roldan, Ellsworth Francis	1581	PHI	−15B	+64N	−17B	F	=53N	−34N	1.5	12.0	12.0	0.75	1513	-8.8
52	Borden, Gadwyn	1505	PHI	−21N	−28B	=61N	F	−48B	+62N	1.5	9.5	9.5	1.00	1454	-11.6
53	John Gabriel Delicana	1741	PHI	F	−54N	−55B	F	=51B	+50N	1.5	5.0	5.0	2.25	1254	-72.4
54	Sta Maria, Matthew Dominic	1534	PHI	−27N	+53B	−16N	F	−17B	−45N	1.0	14.5	15.5	1.50	1563	+4.8
55	Gaddi, Marianne Venice	1467	PHI	−17B	−13N	+53N	−31B	F	−39B	1.0	14.5	15.5	1.50	1440	-7.2
56	Barbosa, Reese Valerie	1648	PHI	−2B	−37N	F	−40B	−45N	+57B	1.0	13.0	13.0	1.00	968	-31.6
57	Navarro, Gael Adam	0	PHI	=29B	−19N	−44B	=50N	−49B	−56N	1.0	11.5	12.5	2.25	1302	0.0
58	Delig, Khent Darylle	1797	PHI	+36B	−38N	−19B	F	F	F	1.0	11.0	11.0	2.50	1605	-19.2
59	Magpantay, John Paul	1692	PHI	F	−7B	−36N	F	+65B	−43N	1.0	10.0	10.0	0.00	828	-69.6
60	Paragas, Vincent Bryan	1681	PHI	+45B	−8N	−43B	F	F	F	1.0	9.5	9.5	2.00	899	-19.2
61	Nolasco, Ruiz	0	PHI	F	−42N	=52B	−34N	=62B	F	1.0	7.5	7.5	1.00	1443	0.0
62	Escolar, Roderick Cruz	1626	FID	−10B	F	−21N	−37B	=61N	−52B	0.5	12.5	12.5	0.50	950	-42.8
63	FIDE 521073317	0	—	−22B	−46N	F	F	−14B	−32N	0.0	14.0	14.0	0.00	855	0.0
64	Magpantay, Lance Marcelo	0	PHI	−16N	−51B	−40N	F	F	−42B	0.0	10.5	10.5	0.00	788	0.0
65	Leabres, Jon Eduardo	0	PHI	−6B	−32N	F	−46B	−59N	F	0.0	10.5	10.5	0.00	861	0.0
66	Sarne, Zyrus Jei	1573	PHI	−23B	F	−41N	F	−26N	F	0.0	9.5	9.5	0.00	975	-29.2

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers

1Donguines, John LaurencePHI
+98.0
4.5 pts · #15
2Miranda, Algene WashingtonPHI
+90.4
3.5 pts · #12
3Almadin, Jan YunikoPHI
+64.0
2.5 pts · #27

Top rating losers

1John Gabriel DelicanaPHI
-72.4
1.5 pts · #55
2Magpantay, John PaulPHI
-69.6
1.0 pts · #63
3Escolar, Roderick CruzFID
-42.8
0.5 pts · #62

Biggest upsets

R4+372 Elo gap
Donguines, John Laurence1717 beat CMAlghamdi, Ahmed M2089
R3+320 Elo gap
Maranan, Junsen Audric1734 beat Romera, Jeffrey2054
R3+274 Elo gap
Gaddi, Marianne Venice1467 beat John Gabriel Delicana1741