CChessStats

49th Guernsey International Chess Festival - Open Tournament

Open SwissStandard

19 players participated in this 7-round tournament, held from 19 Oct 2025 to 25 Oct 2025 in St Peter Port, Guernsey. 7 titled players from 4 federations. Top 10 Elo average was 2038, and top seed was Hamish Olson (🇬🇧 SCO, FM, 2309).

Katarzyna Toma (🇬🇧 ENG, WGM, 2189) won with 5.5/7, ahead of Hamish Olson (5.5) and Alan K Punnett (4.5). Toma shared the lead from round 1, winning on tie-break.

The biggest upset came in round 6: Alan K Punnett (1916) beat Hamish Olson (FM, 2309), a +393-point gap.

Location
🇬🇬St Peter Port, Guernsey
Dates
19 Oct 2025 → 25 Oct 2025
Time control
Standard: 40 Moves in 100 Min. Incr. 30 Sec. / / 40 Min. Incr. 30 Sec.
System
Swiss · 7 rounds
Top seed
🇬🇧FMHamish Olson2309
Avg top 10
2,038
Participants
19
Titled players · 7
FM×2
CM×3
WGM×1
WFM×1
Federations · 4 represented
🇬🇧England×10
🇬🇬Guernsey×4
🇬🇧Scotland×3
🇳🇱Netherlands×2
Top 3

How it unfolded

Top 6 · 7 rounds

Tight race until R7; 2 players tied at 5.5/7, decided on Buchholz. Title race narrowed from 2 co-leaders at R4 to 2 at the finish.

Co-leaders
5
2
2
2
2
1
2
23.55.57R1R2R3R4R5R6R7
Olson5.5Toma5.5Punnett4.5De Kruif4Wager3.5Dilleigh3.5
R7 · TIEBREAK CLUSTER

2 players finish on 5.5/7. Toma takes the title on Buchholz Cut1 (24.0).

R4 · HEAD-TO-HEAD · WINNER VS 2ND

FM Hamish Olson drew with WGM Katarzyna Toma (Black).

WIN STREAKS · 2 top finishers

FM Hamish Olson 3 wins (R1–R3)WGM Katarzyna Toma 3 wins (R1–R3)

Key matchups · top 4

Head-to-head between the four finishers
Player1234
1FMHamish Olson*
½
0
—
2WGMKatarzyna Toma
½
*
1
—
3Alan K Punnett
1
0
*
½
4Kees De Kruif——
½
*

Grille américaine

#PlayerEloFedR1R2R3R4R5R6R7PtsBu C1BuSBPerfΔ
1Toma, KatarzynaWGM2189ENG+3N+8B+7N=2B+6B=9N=5N5.524.027.521.252258+11.4
2Olson, HamishFM2309SCO+18B+5N+6B=1N+8B−3N+13N5.523.024.517.252208-11.2
3Punnett, Alan K1916ENG−1B+14N+13N−5B+15N+2B=4N4.523.526.015.002096+31.6
4De Kruif, Kees1893NED=7N+19B=10B−6N=12B+8N=3B4.021.522.511.751968+16.2
5Collier, David O1976ENG+15N−2BF+3N=10B=6N=1B3.525.025.013.252085+16.6
6Strade, AritaWFM1950GCIF+12B−2N+4B−1N=5B+7N3.525.025.012.252129+27.8
7Giulian, Philip MFM2058SCO=4B+11N−1B=9N=17B+10N−6B3.523.526.012.001948-18.8
8Rosen, Daniel BCM1973ENG+13B−1N+17B=10N−2N−4B+18B3.523.525.08.251981+0.6
9Dilleigh, Stephen P2014ENG=16N=17B=15N=7B=14N=1B=11N3.520.022.511.251925-15.6
10Wager, John D1960ENG=17N+16B=4N=8B=5N−7B=14N3.519.522.010.501906-9.6
11Dijksterhuis, Rolf1938NED=19N−7B+16N=14B=13N=12B=9B3.517.518.58.751896-6.2
12Curtis, John E2009ENG+14B−6NF=15B=4N=11N=16B3.018.518.58.751896-18.4
13Potter, Alexander1882GCI−8NF−3B+18N=11B+17N−2B2.521.021.05.7519000.0
14Giulian, Rosemary A1866SCO−12N−3BF=11N=9B+19N=10B2.519.019.06.251842-3.4
15Morgan, JamieCM1845GCI−5B+18N=9B=12N−3B−16N=19B2.518.519.55.251797-9.0
16Heppell, Ian N1883ENG=9B−10N−11BF=18N+15B=12N2.517.517.56.501893+1.2
17Warner, Nicholas1695ENG=10B=9N−8N+19B=7N−13BF2.517.517.56.251851+19.6
18Thurlow, Kevin JCM1936ENG−2N−15B+19N−13B=16BF−8N1.517.517.52.251716-34.4
19Flanagan, Keith1558GCI=11B−4N−18B−17NF−14B=15N1.016.516.53.001589+1.6

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers
Top rating losers
Biggest upsets