5th Big Rook International Chess Festival Open 2025
SwissStandard
56 players participated in this 9-round tournament, held from 07 May 2025 to 12 May 2025 in Bangkok, Thailand. 14 titled players from 8 federations. Top 10 Elo average was 2201, and top seed was Darwin Laylo (🇵🇭 PHI, GM, 2390).
Diego Abraham Caparino (🇵🇭 PHI, 2145) won with 7.5/9, ahead of Arsens Batashevs (7.0) and Gehua Wen (7.0). Caparino shared the lead from round 7 and broke clear in the final round.
The biggest upset came in round 9: Nguyen Truong An Khang (1835) beat Ching Wei Austin Yang (FM, 2176), a +341-point gap.
Location
🇹🇭Bangkok, Thailand
Dates
07 May 2025 → 12 May 2025
Time control
Standard: 90 minutes with 30 second increment from move 1
System
Swiss · 9 rounds
Titled players · 14
GM×1
IM×1
FM×8
CM×2
WFM×1
WCM×1
Federations · 8 represented
🇵🇭Philippines×8
🇨🇳China×8
🇹🇭Thailand×7
🇹🇼Chinese Taipei×6
🇮🇳India×4
🇸🇬Singapore×4
🇲🇾Malaysia×4
🇰🇷South Korea×3
Top 3
- 🥇
- 🥈
- 🥉
How it unfolded
Top 6 · 9 roundsDiego Abraham Caparino led from R9; +0.5-point edge over the runner-up. Title race converged from 2 co-leaders at R4 to 1 by R9.
Co-leaders
22
11
3
2
2
1
2
2
1
R9 · LEADER CHANGE12 May
Diego Abraham Caparino takes the sole lead (7.5/9).
R4 · HEAD-TO-HEAD · WINNER VS 2ND
Diego Abraham Caparino beat Arsens Batashevs (Black).
WIN STREAKS · 2 top finishers
Diego Abraham Caparino 4 wins (R1–R4)Arsens Batashevs 3 wins (R1–R3)
Key matchups · top 4
Head-to-head between the four finishers| Player | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| 1Diego Abraham Caparino | * | 1 | ½ | ½ |
| 2Arsens Batashevs | 0 | * | — | ½ |
| 3FMAlexander Chernyavsky | ½ | — | * | 1 |
| 4CMGehua Wen | ½ | ½ | 0 | * |
Grille américaine
| # | Player | Elo | Fed | R1 | R2 | R3 | R4 | R5 | R6 | R7 | R8 | R9 | Pts | Bu C1 | Bu | SB | Perf | Δ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Caparino, Diego Abraham | 2145 | PHI | +17B | +9N | +11B | +2N | =3B | =4N | +7B | +14N | =5B | 7.5 | 50.0 | 55.0 | 44.75 | 2368 | +48.4 |
| 2 | Batashevs, Arsens | 2195 | LAT | +25N | +10B | +7N | −1B | +23N | +16B | =3B | +15N | =9B | 7.0 | 47.0 | 51.5 | 37.50 | 2240 | +10.6 |
| 3 | Wen, GehuaCM | 2115 | CHN | +45N | +54B | +28N | +14B | =1N | +6B | =2N | +8B | −4N | 7.0 | 45.5 | 46.5 | 32.25 | 2336 | +50.8 |
| 4 | Chernyavsky, AlexanderFM | 2336 | RUS | +30N | +23B | =36N | +41B | =6N | =1B | =8N | +7B | +3B | 7.0 | 44.5 | 48.0 | 36.50 | 2306 | -4.0 |
| 5 | Villanueva, NelsonFM | 2021 | PHI | +43N | −14B | +17N | +29B | −21N | +28B | +16N | +11B | =1N | 6.5 | 40.5 | 44.0 | 30.75 | 2160 | +32.8 |
| 6 | Li, BoIM | 2249 | CHN | =22B | +29N | +35B | +8N | =4B | −3N | =11B | +24N | =12B | 6.0 | 44.0 | 47.5 | 29.25 | 2133 | -9.4 |
| 7 | Ko Ko OhnFM | 2029 | MYA | +39B | +56N | −2B | +33N | +11B | +21B | −1N | −4N | +15B | 6.0 | 44.0 | 44.0 | 22.50 | 2177 | +15.5 |
| 8 | Castellano, ChristopherFM | 2107 | PHI | +31B | +46N | =14N | −6B | +28N | +12B | =4B | −3N | +17B | 6.0 | 43.5 | 46.5 | 27.50 | 2196 | +22.4 |
| 9 | Sreekarthika VelmuruganWFM | 1948 | SGP | +55N | −1B | +40N | −21B | +26N | +45B | =41N | +25B | =2N | 6.0 | 38.0 | 38.5 | 21.25 | 2080 | +59.7 |
| 10 | Buakird, Apichit | 1988 | THA | +38B | −2N | +18B | =22N | =45N | +30B | −15B | +31N | +32B | 6.0 | 37.0 | 40.0 | 24.25 | 2041 | +13.8 |
| 11 | Teo, Hong Ming | 1989 | SGP | +48N | +21B | −1N | +30B | −7N | +29B | =6N | −5N | +24B | 5.5 | 43.0 | 46.0 | 23.00 | 2072 | +20.8 |
| 12 | Yun, HungiFM | 2090 | KOR | =35N | =49B | +26N | −16B | +13N | −8N | +29B | +19B | =6N | 5.5 | 39.5 | 42.5 | 25.25 | 1994 | -36.4 |
| 13 | Nguyen Truong An Khang | 1835 | VIE | −15B | +42N | −32B | +50N | −12B | +38N | +46B | =22N | +21N | 5.5 | 33.5 | 36.0 | 19.25 | 1969 | +62.8 |
| 14 | Laylo, DarwinGM | 2390 | PHI | +24B | +5N | =8B | −3N | +46N | +22B | =21N | −1B | F | 5.0 | 43.5 | 43.5 | 23.75 | 2162 | -19.0 |
| 15 | Habla, JonyFM | 2174 | PHI | +13N | −28B | −30N | +40B | +39N | +33B | +10N | −2B | −7N | 5.0 | 40.0 | 43.5 | 22.50 | 1960 | -43.0 |
| 16 | Bonnet, Gabriel Misa Jean | 1921 | SGP | =37B | +52N | =22B | +12N | +36B | −2N | −5B | −18N | +45B | 5.0 | 38.5 | 40.5 | 18.00 | 1946 | +11.6 |
| 17 | Dayal, Samar | 1834 | ENG | −1N | +55B | −5B | +42N | −33B | +37N | +28N | +36B | −8N | 5.0 | 38.5 | 39.0 | 15.00 | 1941 | +46.8 |
| 18 | Ji, Mingxuan | 1768 | CHN | −36N | +53B | −10N | +56B | −29N | +34B | +33N | +16B | F | 5.0 | 32.0 | 32.0 | 14.00 | 1904 | +51.6 |
| 19 | Gnanasekar, Jai Adithya | 1882 | SGP | +51B | +32N | −41N | −23B | =31B | =46N | +47B | −12N | +35B | 5.0 | 31.0 | 33.0 | 16.00 | 1926 | +23.2 |
| 20 | Nguyen, Hoang Minh | 1596 | VIE | =27B | −22N | =37B | −31N | +42B | =49N | +38B | =45N | +29B | 5.0 | 30.5 | 33.5 | 18.00 | 1819 | +100.8 |
| 21 | Yang, Ching Wei AustinFM | 2176 | TPE | +26B | −11N | +24B | +9N | +5B | −7N | =14B | −32N | −13B | 4.5 | 43.5 | 47.5 | 24.00 | 1996 | -39.2 |
| 22 | Xie, Chujun | 1848 | CHN | =6N | +20B | =16N | =10B | +41N | −14N | −24B | =13B | =36N | 4.5 | 40.5 | 44.0 | 21.50 | 1987 | +56.8 |
| 23 | Looi, Xin HaoCM | 2014 | MAS | +34B | −4N | +31B | +19N | −2B | =24N | −25B | +46N | F | 4.5 | 39.0 | 39.0 | 18.25 | 1989 | -4.6 |
| 24 | Wongsawan, Thoetsak | 1864 | THA | −14N | +43B | −21N | +49B | +34N | =23B | +22N | −6B | −11N | 4.5 | 37.5 | 40.5 | 17.25 | 1968 | +19.6 |
| 25 | Vijay Chauhan | 1843 | IND | −2B | −38N | =47B | +51N | +35B | +26B | +23N | −9N | F | 4.5 | 37.0 | 39.0 | 16.00 | 1871 | +6.2 |
| 26 | Bhavanya Panchumarthi | 1839 | IND | −21N | +48B | −12B | +37N | −9B | −25N | +52B | +47N | =27B | 4.5 | 34.5 | 36.5 | 13.75 | 1846 | +0.8 |
| 27 | Kim, Taewoo A | 1895 | KOR | =20N | −35B | +44N | −39B | +48N | −41B | =45N | +49B | =26N | 4.5 | 29.5 | 32.5 | 15.75 | 1769 | -28.4 |
| 28 | UMER S.M | 1901 | IND | +42B | +15N | −3B | +32N | −8B | −5N | −17B | −35N | +31B | 4.0 | 41.0 | 44.5 | 16.50 | 1903 | +0.4 |
| 29 | Panteleev, Mikhail A | 1872 | RUS | +50N | −6B | +56B | −5N | +18B | −11N | −12N | +48B | −20N | 4.0 | 39.0 | 39.0 | 10.50 | 1774 | -42.4 |
| 30 | Lau, Sau Ching | 1861 | MAS | −4B | +34N | +15B | −11N | +38B | −10N | −32B | F | +48N | 4.0 | 38.5 | 41.5 | 15.50 | 1946 | +14.8 |
| 31 | Kim, Yegeon | 1826 | KOR | −8N | +47B | −23N | +20B | =19N | +39B | =36N | −10B | −28N | 4.0 | 37.5 | 40.5 | 15.75 | 1840 | +5.2 |
| 32 | Yu,Shi | 2052 | CHN | +40N | −19B | +13N | −28B | F | F | +30N | +21B | −10N | 4.0 | 32.5 | 32.5 | 17.50 | 1966 | -28.4 |
| 33 | Keok, Kai En | 1890 | MAS | +53N | −36B | +49N | −7B | +17N | −15N | −18B | +43B | F | 4.0 | 32.0 | 32.0 | 12.50 | 1856 | -6.6 |
| 34 | Pi, Chongxi | 1716 | CHN | −23N | −30B | +53N | +54B | −24B | −18N | =37B | =44N | +52B | 4.0 | 28.0 | 29.0 | 7.50 | 1712 | -3.6 |
| 35 | Voronin, Alexander | 1781 | RUS | =12B | +27N | −6N | −45B | −25N | +40B | F | +28B | −19N | 3.5 | 36.0 | 36.0 | 14.75 | 1881 | +35.2 |
| 36 | Wiwatanadate, PoompongFM | 2057 | THA | +18B | +33N | =4B | F | −16N | F | =31B | −17N | =22B | 3.5 | 34.5 | 34.5 | 16.75 | 1917 | -25.0 |
| 37 | Xia, Miaoyan | 1676 | CHN | =16N | −41B | =20N | −26B | +56N | −17B | =34N | =40B | =39N | 3.5 | 34.0 | 34.0 | 10.50 | 1672 | -6.4 |
| 38 | Wu, Sinian | 1684 | CHN | −10N | +25B | +54N | −46B | −30N | −13B | −20N | +51B | =40N | 3.5 | 33.5 | 34.5 | 9.25 | 1720 | +12.0 |
| 39 | Lim, Kian Guan | 1758 | MAS | −7N | +50B | =46B | +27N | −15B | −31N | =48N | F | =37B | 3.5 | 33.0 | 35.5 | 11.75 | 1789 | +4.2 |
| 40 | Wang, MiWCM | 1765 | TPE | −32B | +51N | −9B | −15N | =47B | −35N | +50B | =37N | =38B | 3.5 | 31.0 | 33.0 | 9.50 | 1690 | -20.6 |
| 41 | Salvador, Louie | 2121 | PHI | F | +37N | +19B | −4N | −22B | +27N | =9B | F | F | 3.5 | 30.5 | 30.5 | 16.00 | 1995 | -16.0 |
| 42 | Rodraksa, Traya | 1607 | THA | −28N | −13B | +43N | −17B | −20N | −48B | +56N | =55B | +50N | 3.5 | 29.0 | 29.0 | 6.25 | 1575 | -15.6 |
| 43 | Bumbak, Jacob | 1719 | AUS | −5B | −24N | −42B | +55N | +50B | −47N | +53B | −33N | =44B | 3.5 | 28.5 | 29.0 | 5.75 | 1615 | -26.2 |
| 44 | Chen, Pin-Jui | 1553 | TPE | −54N | =45B | −27B | −47N | =51B | =50N | +55B | =34B | =43N | 3.5 | 23.5 | 24.0 | 8.00 | 1626 | +26.8 |
| 45 | Santiaguel, Jerico M. | 1832 | PHI | −3B | =44N | F | +35N | =10B | −9N | =27B | =20B | −16N | 3.0 | 40.5 | 42.5 | 13.00 | 1763 | -15.8 |
| 46 | Rohland, Michael Karl | 1902 | CAN | +47N | −8B | =39N | +38N | −14B | =19B | −13N | −23B | F | 3.0 | 36.0 | 36.0 | 10.75 | 1816 | -21.8 |
| 47 | Wang, Zi-Jie | 1645 | TPE | −46B | −31N | =25N | +44B | =40N | +43B | −19N | −26B | −49N | 3.0 | 31.5 | 34.5 | 11.00 | 1661 | +5.2 |
| 48 | Kaewwattha, Natrada | 1705 | THA | −11B | −26N | =51B | +52N | −27B | +42N | =39B | −29N | −30B | 3.0 | 31.5 | 33.5 | 8.25 | 1650 | -28.0 |
| 49 | Frost, Peter | 1741 | AUS | F | =12N | −33B | −24N | +53B | =20B | F | −27N | +47B | 3.0 | 27.5 | 27.5 | 9.25 | 1737 | -2.4 |
| 50 | Chao, Tzu-Chi Angie | 1463 | TPE | −29B | −39N | +55N | −13B | −43N | =44B | −40N | +56B | −42B | 2.5 | 27.5 | 27.5 | 2.25 | 1471 | -3.6 |
| 51 | Nakthip, Nakorn | 1516 | THA | −19N | −40B | =48N | −25B | =44N | −52B | F | −38N | +53N | 2.0 | 26.0 | 26.0 | 4.25 | 1508 | -9.2 |
| 52 | Surapongprapa, Rabil | 1639 | THA | F | −16B | F | −48B | F | +51N | −26N | +53B | −34N | 2.0 | 22.5 | 22.5 | 3.00 | 1580 | -20.4 |
| 53 | Chao, Andrew Tzu Chun | 1531 | TPE | −33B | −18N | −34B | F | −49N | +56B | −43N | −52N | −51B | 1.0 | 23.5 | 23.5 | 0.00 | 913 | -77.2 |
| 54 | Lauron, Paul John | 1891 | PHI | +44B | −3N | −38B | −34N | F | F | F | F | F | 1.0 | 18.0 | 18.0 | 3.50 | 1575 | -31.8 |
| 55 | Ayaan Mukherjee | 1676 | IND | −9B | −17N | −50B | −43B | F | F | −44N | =42N | F | 0.5 | 24.0 | 24.0 | 1.75 | 1286 | -97.6 |
| 56 | FIDE 6224733 | 0 | — | F | −7B | −29N | −18N | −37B | −53N | −42B | −50N | F | 0.0 | 26.0 | 26.0 | 0.00 | 906 | 0.0 |
Key insights
Biggest movers and upsets — the story behind the numbers.
Top rating gainers
- 1Nguyen, Hoang MinhVIE+100.85.0 pts · #13
- 2Nguyen Truong An KhangVIE+62.85.5 pts · #10
- 3Sreekarthika VelmuruganWFMSGP+59.76.0 pts · #6
Top rating losers
- 1Ayaan MukherjeeIND-97.60.5 pts · #54
- 2Chao, Andrew Tzu ChunTPE-77.21.0 pts · #55
- 3Habla, JonyFMPHI-43.05.0 pts · #17
Biggest upsets
- R9+341 Elo gap
- R3+313 Elo gap
- R9+276 Elo gap