Threatening 22. R takes R: ch., R takes R: 23. R takes R: ch., B takes R;
24. Q to K 8: mate.
... 21. P to K R 3
The position being perfectly even, the game should result in a draw. There
is no danger now for Black to lose a piece, because after 22. R takes R:
ch., R takes R: 23. R takes R: ch., B takes R; 24. Q to K 8: ch., K to R 2,
White cannot play 25. Q takes B, because of 25. ... Q to Kt 8: mate.