International Chess Holiday 2025 - K2
Round-RobinStandard
10 players participated in this 9-round tournament, held from 27 Jul 2025 to 01 Aug 2025 in Praha, Czech Republic. 4 federations represented. Top 10 Elo average was 1878, and top seed was Frantisek Korenek (🇨🇿 CZE, 1968).
Vaclav Macha (🇨🇿 CZE, 1875) won with 6.0/9, ahead of Frantisek Korenek (6.0) and Nico Schoenmakers (5.5). Macha shared the lead from round 7, winning on tie-break.
The biggest upset came in round 5: Jiri Feierfeil (1738) beat Michael Ruell (1846), a +108-point gap.
Location
🇨🇿Praha, Czech Republic
Dates
27 Jul 2025 → 01 Aug 2025
Time control
Standard: 90 minutes with 30 second increment from move 1
System
Round-robin · 9 rounds
Federations · 4 represented
🇨🇿Czech Republic×6
🇩🇪Germany×2
🇸🇪Sweden×1
🇳🇱Netherlands×1
Top 3
- 🥇
- 🥈
- 🥉
How it unfolded
Top 10 · 9 roundsCo-leaders
3
1
3
1
3
1
2
1
2
R8 · LEADER CHANGE31 Jul
Vaclav Macha takes the sole lead (5.5/8).
R3 · HEAD-TO-HEAD · WINNER VS 2ND
Frantisek Korenek lost to Vaclav Macha (Black).
R7–R9 · WIN STREAK
Nico Schoenmakers won 3 in a row (R7–R9).
Cross-table
| # | Player | Elo | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | Pts | SB | Bh | Δ Elo | Perf |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2 | 🇨🇿Macha, Vaclav | 1875 | * | 1 | ½ | ½ | 1 | ½ | ½ | ½ | 1 | ½ | 6.0 | 25.75 | 39.0 | +30.2 | 2004 |
| 1 | 🇨🇿Korenek, Frantisek | 1968 | 0 | * | ½ | ½ | 1 | ½ | 1 | ½ | 1 | 1 | 6.0 | 22.75 | 39.0 | +6.0 | 1994 |
| 3 | 🇳🇱Schoenmakers, Nico | 1856 | ½ | ½ | * | ½ | 0 | 1 | 1 | ½ | 1 | ½ | 5.5 | 23.00 | 39.5 | +26.2 | 1961 |
| 4 | 🇨🇿Marsalek, Lubos | 1906 | ½ | ½ | ½ | * | 1 | ½ | ½ | 0 | 1 | 1 | 5.5 | 21.25 | 39.5 | +12.6 | 1955 |
| 5 | 🇸🇪Algars, Olle | 1870 | 0 | 0 | 1 | 0 | * | 1 | ½ | 1 | ½ | 1 | 5.0 | 19.25 | 40.0 | +12.2 | 1922 |
| 6 | 🇩🇪Hentzgen, Thomas | 1930 | ½ | ½ | 0 | ½ | 0 | * | ½ | 1 | 1 | 1 | 5.0 | 18.25 | 40.0 | -3.8 | 1916 |
| 7 | 🇨🇿Svoboda, Daniel | 1941 | ½ | 0 | 0 | ½ | ½ | ½ | * | 1 | 1 | 1 | 5.0 | 17.75 | 40.0 | -10.2 | 1915 |
| 8 | 🇨🇿Suchy, Ladislav | 1852 | ½ | ½ | ½ | 1 | 0 | 0 | 0 | * | 1 | 1 | 4.5 | 16.75 | 40.5 | +7.6 | 1881 |
| 9 | 🇨🇿Feierfeil, Jiri | 1738 | 0 | 0 | 0 | 0 | ½ | 0 | 0 | 0 | * | 1 | 1.5 | 3.50 | 43.5 | -22.8 | 1621 |
| 10 | 🇩🇪Ruell, Michael | 1846 | ½ | 0 | ½ | 0 | 0 | 0 | 0 | 0 | 0 | * | 1.0 | 5.75 | 44.0 | -61.2 | 1531 |
Key insights
Biggest movers and upsets — the story behind the numbers.
Top rating gainers
- 1Macha, VaclavCZE+30.26.0 pts · #2
- 2Schoenmakers, NicoNED+26.25.5 pts · #3
- 3Marsalek, LubosCZE+12.65.5 pts · #4
Top rating losers
- 1Ruell, MichaelGER-61.21.0 pts · #10
- 2Feierfeil, JiriCZE-22.81.5 pts · #9
- 3Svoboda, DanielCZE-10.25.0 pts · #7
Biggest upsets
- R5+108 Elo gap