John Costello

Country

IOM

Birth Year

1966

Gender

Title

FIDE ID

451819

FIDE ratings

1806

Published FIDE

1820

Published FIDE

—

Published FIDE

Active players · Oct 2026 FIDE list ⓘ

Based on available monthly lists and saved games.

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Available Games

Published games available in our archive; coverage varies by tournament. Archive last checked: 2026-10-04 (UTC).

#	Date	Event	Site	Round	White	Black	Result	Moves	View
1	2026-09-27	46th FIDE Chess Olympiad Samarkand 2026 \| Open \| Matches 63-87	Samarkand, Uzbekistan	11.362	Kabamwanishi, Mashala	Costello, John	1-0	52	Open 🎥
2	2026-09-26	46th FIDE Chess Olympiad Samarkand 2026 \| Open \| Matches 63-87	Samarkand, Uzbekistan	10.366	Costello, John	Henry Marwa Michael	0-1	71	Open 🎥
3	2026-09-25	46th FIDE Chess Olympiad Samarkand 2026 \| Open \| Matches 88+	Samarkand, Uzbekistan	9.394	Costello, John	Delrieu, Marc	1/2-1/2	48	Open 🎥
4	2026-09-24	46th FIDE Chess Olympiad Samarkand 2026 \| Open \| Matches 63-87	Samarkand, Uzbekistan	8.37	Abdou, Mohamed	Costello, John	0-1	29	Open 🎥
5	2026-09-23	46th FIDE Chess Olympiad Samarkand 2026 \| Open \| Matches 88+	Samarkand, Uzbekistan	7.378	Ngwenya Kwanele Mangaliso	Costello, John	0-1	50	Open 🎥
6	2026-09-21	46th FIDE Chess Olympiad Samarkand 2026 \| Open \| Matches 63-87	Samarkand, Uzbekistan	6.35	Costello, John	MBOULA MBOUMBA, Jerome	0-1	29	Open 🎥
7	2026-09-20	46th FIDE Chess Olympiad Samarkand 2026 \| Open \| Matches 63-87	Samarkand, Uzbekistan	5.299	Husbands, Orlando	Costello, John	1-0	34	Open 🎥
8	2026-09-18	46th FIDE Chess Olympiad Samarkand 2026 \| Open \| Matches 63-87	Samarkand, Uzbekistan	3.326	Sai Han Thiha	Costello, John	1-0	39	Open 🎥
9	2026-09-17	46th FIDE Chess Olympiad Samarkand 2026 \| Open \| Matches 88+	Samarkand, Uzbekistan	2.395	Canto, Roger Rashid	Costello, John	0-1	36	Open 🎥
10	2026-09-16	46th FIDE Chess Olympiad Samarkand 2026 \| Open \| Matches 38-62	Samarkand, Uzbekistan	1.27	Costello, John	Germanovs, Georgijs	0-1	29	Open 🎥