Tri odlučene partije u 4. kolu
U 4. kolu pobjede su postigli (na „A“ turniru) Akobian Varuzhan, Robson Ray i Bortnyk Olexandr. Tako su posle 4. kola, na ovom prilično ujednačenom turniru, čak 4 igrača na vrhu tabele sa po 2,5 poena: Akobian. Lenderman, Durarbayli i Robson.
| Rezultati 4. kola (13. septembar, 2019) | ||||||
| Akobian, Varuzhan | – Swiercz, Dariusz | 1-0 | 66 | D85 | Gruenfeld Defence | |
| Robson, Ray | – Smirin, Ilia | 1-0 | 55 | C97 | Ruy Lopez | |
| Bortnyk, Olexandr | – Durarbayli, Vasif | 1-0 | 56 | C24 | Bishop’s Opening | |
| Melkumyan, Hrant | – Van Foreest, Jorden | ½-½ | 50 | D37 | QGD 5.Bf4 | |
| Ipatov, Alexander | – Lenderman, Aleksandr | ½-½ | 37 | D38 | QGD Ragozin | |
Stanje posle 4. kola
| 1. | Akobian, Varuzhan | g | USA | 2618 | 2½ |
| 2. | Lenderman, Aleksandr | g | USA | 2645 | 2½ |
| 3. | Durarbayli, Vasif | g | AZE | 2626 | 2½ |
| 4. | Robson, Ray | g | USA | 2653 | 2½ |
| 5. | Bortnyk, Olexandr | g | UKR | 2602 | 2 |
| 6. | Swiercz, Dariusz | g | USA | 2648 | 2 |
| 7. | Van Foreest, Jorden | g | NED | 2622 | 2 |
| 8. | Melkumyan, Hrant | g | ARM | 2653 | 2 |
| 9. | Ipatov, Alexander | g | TUR | 2650 | 1 |
| 10. | Smirin, Ilia | g | ISR | 2599 | 1 |
Robson,R (2653) – Smirin,I (2599) [C97]
St Louis Fall A 2019 Saint Louis USA (4), 13.09.2019
1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0–0 Be7 6.Re1 b5 7.Bb3 d6 8.c3 0–0 9.h3 Na5 10.Bc2 c5 11.d4 Qc7 12.d5 Bd7 13.b3 Rfe8 14.Nbd2 g6 15.Nf1 Nh5 16.Ng3 Nxg3 17.fxg3 Nb7 18.Be3 c4 19.b4 a5 20.a4 Rec8 21.axb5 Bxb5 22.Ba4 Qd7 23.Bxb5 Qxb5 24.Ra4 Bd8 25.Nd2 Bb6 26.Bxb6 Qxb6+ 27.Kh2 axb4
28.Nxc4 Qc7 29.Rxb4 Rab8 30.Qf3 Nc5 31.Qf6 Rd8 32.Rxb8 Qxb8 33.Rf1 Rd7 34.Qf3 Qd8 35.Qe3 Qc7 36.Rb1 Nb7
37.Qa7 Kg7 38.Rb4 h5 39.Qe3 Qc5 40.Qf3 Qc7 41.g4 hxg4 42.Qxg4 Qd8 43.Rb1 Rc7 44.Ne3 Nc5 45.Nf5+ Kf8 46.Qh4 Ke8
47.Rb8 Qxb8 48.Qh8+ Kd7 49.Qxb8 gxf5 50.exf5 Rc8 51.Qa7+ Rc7 52.Qb6 Ne4 53.c4 Nc5 54.h4 Rc8 55.f6 Ne4 1–0
Akobian,V (2618) – Swiercz,D (2648) [D85]
St Louis Fall A 2019 Saint Louis USA (4), 13.09.2019
1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Ba3 0–0 8.Nf3 b6 9.Bc4 Bb7 10.Qe2 c5 11.0–0 Qc7 12.Rac1 Nc6 13.Rfd1 Rac8 14.h4 Na5 15.Bd3 e6 16.h5 Qc6 17.Rb1 Rfd8 18.Bc1 cxd4 19.cxd4 Qe8 20.hxg6 hxg6 21.Bg5 f6 22.Bd2 Nc6 23.Bc3 g5 24.Bc4 Nb8 25.Nd2 Nd7 26.Rbc1 Nf8 27.Bb3 Bc6 28.Qa6 Rc7 29.Bb2 Bb5 30.Qa3 Rxc1 31.Rxc1 a5 32.Nc4 a4 33.Bd1 Qc6
34.d5 Qc5 35.Ne3 Qxa3 36.Bxa3 Bd3 37.Be7 Ra8 38.Bf3 Ng6 39.Bd6 f5 40.dxe6 g4
41.exf5 gxf3 42.fxg6 Bxg6 43.Nd5 Rd8 44.Ne7+ Kh7 45.Nxg6 Kxg6 46.e7 Re8 47.Rc6 b5 48.Rb6 fxg2 49.Rxb5 Bf6 50.Ra5 Bxe7
51.Re5 Kf7 52.Rxe7+ Rxe7 53.Bxe7 Kxe7 54.Kxg2 Kd6 55.Kf3 Kc5 56.Ke4 Kb4 57.f4 Ka3 58.f5 Kxa2 59.f6 a3 60.f7 Kb2 61.f8Q a2 62.Qb4+ Kc2 63.Qa3 Kb1 64.Qb3+ Ka1 65.Qc3+ Kb1 66.Kd3 1–0
Bortnyk,Olexandr (2602) – Durarbayli,V (2626) [C24]
St Louis Fall A 2019 Saint Louis USA (4), 13.09.2019
1.e4 e5 2.Bc4 Nf6 3.d3 c6 4.Nf3 d5 5.Bb3 a5 6.a3 a4 7.Ba2 Bd6 8.Qe2 0–0 9.h3 Nbd7 10.0–0 h6 11.Re1 Re8 12.Qf1 Nf8 13.Nc3 Bb8 14.g4 Ng6 15.Qg2 Be6 16.g5 hxg5 17.Nxg5 Ra5 18.Nxe6 Rxe6 19.Bg5 Qd7 20.Kh1 Nh7 21.exd5 cxd5 22.Bd2 Nf6 23.Rg1 Rc5 24.Rae1 Kf8 25.Be3 Ra5 26.Bg5 Ba7 27.Bd2 Rc6 28.b4 axb3 29.Bxb3 Rxa3 30.Nb5
30…Rxb3 31.cxb3 Rc2 32.Bb4+ Bc5
33.Na3 Bxb4 34.Nxc2 Bxe1 35.Nxe1 Qb5 36.Qg5 Qxb3 37.Qf5 Qb6 38.Qc8+ Ne8 39.Nf3 Ne7 40.Qg4 f6 41.Qh4 Qb3 42.Qh8+ Kf7 43.Rg3 d4 44.h4 Qd1+ 45.Kh2 Qf1
46.Ng5+ fxg5 47.Rf3+ Nf6 48.hxg5 Ng6 49.Rxf6+ gxf6 50.Qxf6+ Ke8 51.Qxg6+ Kd7 52.Qf7+ Kd6 53.g6 Qxd3 54.g7 Qh7+ 55.Kg3 Qd3+ 56.Qf3 1–0