Prime number

Humpy Koneru – 侯逸凡 (Hóu Yìfán)
19th Asian Games — Women’s Team Standard; 杭州 (Hángzhōu), October 2, 2023
Queen’s Gambit Declined D58

1. d4 e6 2. c4 Nf6 3. Nc3 d5 4. Bg5 Be7 5. e3 h6 6. Bh4 0-0 7. Nf3 b6 8. Rc1 Bb7 9. Bd3 dxc4 10. Bxc4 Nbd7 11. 0-0 c5 12. Qe2 a6

13. a4 cxd4 14. Nxd4. Or 14. exd4 Nh5 15. Bxe7 Qxe7 16. d5 Nf4 17. Qe3 Qf6 18. Ne4 Qf5 19. Ng3 Qf6 20. Ne4 Qf5 ½ : ½ Kasparov – Karpov, World Chess Championship 1984–1985, Moscow 1984, match game 34.
14. ... Nc5 15. Nb3 Nxb3 16. Bxb3 Nd7 17. Bg3 Bh4 18. Bd6

18. ... Be7! Dubious is the Exchange sacrifice 18. ... Nc5?! 19. Bxf8 Nxb3 20. Rcd1 Qxf8 21. Qc4!± 马中涵 (Mǎ Zhōnghán) – Ivanchuk, 2nd Qatar Masters Open, Doha 2015.
19. Bg3 Bh4 20. Bd6 Be7 21. Bg3 ½ : ½.

侯逸凡 (Hóu Yìfán) and Koneru know each other well enough to know that a draw can be satisfactory for both. Photo (detail): dalongzhouqian.