Karpova: This game between Moritz of Stettin and Emmrich of Dresden, was the 3rd game of the 2nd play-off. The game was annotated by <Dr. Th.> (I guess Thanhofer).
13...Ng4<!> If White accepts the scarifice, he loses (<14.hxg4 Qh4 15.g3 Bxg3 16.fxg3 Qxg3+ 17.Kf1 Bxg4>).
16.Re2<!> The ♘ cannot be taken (<16.Qxf2 Bh2+>). In the game Sery - Dr. Becsey (perhaps Vecsey), Czech National Tournament (1921), White won after <16.Qxf2 Bg3 17.Qxf7+>.
Marshall played 20...Bxf2 - Capablanca vs Marshall, 1918 - but the text move, 20...Qxc1, was suggested by the 'Deutschen Schachzeitung' as stronger.
At the British Championship (1921) in Malvern, Yates played against Hamlon <21.Bxf7+ Kh8 22.Rf1 Qc2+ 23.Nd2 Rae8+ 24.Bxe8 Rxe8+ 25.Qe3+ Rxe3+ 26.Kxe3 h6>, but the last move was a mistake and Hamlon soon lost. Teichmann noted, that Black could have saved the game with <26...g5!>.
The move 26...Rc1+ was not annotated, but Black can force a perpetual after 26...Qd1+ 27.Kd3 Qe2+.
Source: 'Österreichische Schachrundschau', November/December 1922, issue 10/12, pp. 82-83