Koster, Ramon vs Duijker, Rick - Round 4: Koster, Ramon - Duijker, Rick - 2025.12.24

2026.08.08 vs Ronge, Tim 2026.07.24 vs Nemegeer, Arne 2026.07.23 vs Bus, Tom 2026.07.22 vs Hylarides, Charlie Ronald 2026.07.21 vs Chanda, Sandipan 2026.07.19 vs Grooten, Tommy 2026.07.18 vs Bosboom, Manuel 2026.07.17 vs Van t Hoff, Tom 2026.07.16 vs Labruyere, Roger 2026.07.15 vs Albers, Sasa 2026.07.14 vs Schoehuijs, Erik 2025.12.29 vs Sydykov, Bayastan 2025.12.28 vs Korchynskyi, Mykola 2025.12.28 vs Elgersma, Onno 2025.12.27 vs Aakash, G. 2025.12.26 vs Van Foreest, Machteld 2025.12.24 vs Smeets, Kobe 2025.12.24 vs Koster, Ramon 2025.12.22 vs Lahaye, Rick 2025.12.21 vs Maris, Ivo 2025.07.30 vs Jakhari, Ansh 2025.07.29 vs Blok, Xaveer 2025.07.28 vs De Wit, Evan 2025.07.27 vs Van t Hoff, Tom 2025.07.26 vs Kurt, Sascha 2025.07.25 vs Elgersma, Onno 2025.07.24 vs Gergin, Isafara 2025.07.23 vs Breuker, Dennis 2025.07.22 vs Flom, Gabriel 2024.12.30 vs Slagboom, Leandro 2024.12.29 vs Schoorl, Rob 2024.12.28 vs Labruyere, Roger 2024.12.27 vs Grooten, Herman 2024.12.26 vs Ivanov, Dmytro 2024.12.24 vs Groenewoud, Joel 2024.12.23 vs Khoo-Thwe, Louis 2024.12.22 vs Madularea, David 2024.12.21 vs Dolzhykova, Kateryna 2024.11.02 vs Kukushkin, Ivan 2024.11.01 vs Plukkel, Sjoerd 2024.10.31 vs Ten Dam, Bram 2024.10.30 vs Emans, Job 2024.10.29 vs Bosboom, Manuel 2024.10.28 vs Vaupot, Kajetan 2024.10.27 vs Labruyere, Roger 2024.10.26 vs Westerhof, Fleur 2024.07.21 vs Khatniuk, Anastasiia 2024.07.20 vs Kanis, Sierk 2024.07.19 vs Wunnink, Michael 2024.07.18 vs Groenewoud, Joel 2024.07.17 vs In t Veld, Daan 2024.07.16 vs Goudriaan, Rafael 2024.07.15 vs Emans, Job ????.??.?? vs Titus, Branco
Duijker, Rick (2148)
Koster, Ramon (2307)
EventRound 4: Koster, Ramon - Duijker, Rick
Sitehttps://lichess.org/broadcast/chessfestival-groningen-2025--open-a/round-4/NDMkwvAA/FX9FEm8x
Date2025.12.24
Round4.17
WhiteKoster, Ramon
BlackDuijker, Rick
Result1/2-1/2
WhiteElo2307
WhiteTitleFM
WhiteFideId1008544
BlackElo2148
BlackTitleFM
BlackFideId1010565
VariantStandard
ECOD21
OpeningQueen's Gambit Accepted: Rosenthal Variation
UTCDate2025.12.24
UTCTime11:15:23
BroadcastNameChessfestival Groningen 2025 | Open A
BroadcastURLhttps://lichess.org/broadcast/chessfestival-groningen-2025--open-a/round-4/NDMkwvAA
GameURLhttps://lichess.org/broadcast/chessfestival-groningen-2025--open-a/round-4/NDMkwvAA/FX9FEm8x
Engine eval --
1/2-1/2
Koster, Ramon
1 blunder
0 mistakes
0 inaccuracies
94% accuracy
Duijker, Rick
1 blunder
0 mistakes
0 inaccuracies
96% accuracy