Спёртый мат (Smothered mate)

Matthias Blübaum – Nikita Kirillovich Vitiugov
5th GRENKE Chess Classic; Karlsruhe, March 31, 2018
3q2k1/Q4pp1/5np1/8/8/2r2B2/P4KPP/R7 b - - 0 24

Position after 24. Qa4xa7

24. ... Ne4+! 25. Kg1. If 25. Ke1 then 25. ... Rc2 finis. If, instead 25. Bxe4 then 25. ... Rc7!! forcing a won endgame in all variations. 25. ... Ra3!! 0 : 1. For if 26. Qxa3 then 26. ... Qd4+ 27. Kh1 Nf2+ 28. Kg1 Nh3++ 29. Kh1 Qg1+ 30. Rxg1 Nf2 mate.

Matthias Blübaum (right) vs. Nikita Kirillovich Vitiugov (left). Photo: Georgios Souleidis/GRENKE Chess Classic.