As you probably know, the research include the systematic investigation into and study of materials and sources in order to establish facts and reach new conclusions.

On November 9 I found an article of Aron Nimzowitsch ("Rigasche Rundschau" November 29, p5.) were he stated that the game was played in Berlin. The conclusion was that the game was played in Berlin. The date of the game wasn't mentioned in that article, so the date when Lasker was in Moscow could be excluded.

On the next day (November 10) I found the article "Chess King in Moscow" in archive of the Russian newspaper "Раннее утро" ("Early morning") from March 31, 1914.

Don't you be making foolish remarks either, <hemy>. If you didn't understand, I was thanking you for your research. Usually, when someone says "thank you," your reply should be "you're welcome."

I found two games of J. Zabludowski from the First Baltic Tournament...

... a win vs Karl Behting was given on page 210 of the Deutsche Schachzeitung 7.1899:

[Event "First Baltic Tournament - Major"]
[Site "Riga"]
[Date "1899.04.12"]
[White "Zabludowski, J."]
[Black "Betins, Karlis Karlovich"]
[Result "1-0"]
[ECO "D07"]
[PlyCount "63"]

1. d4 d5 2. c4 e5 3. dxe5 d4 4. a3 Nc6 5. e3 dxe3 6. Qxd8+ Kxd8 7. Bxe3 Nxe5 8. Nd2 Bf5 9. Ngf3 Ng4 10. Bd4 Kd7 11. O-O-O c5 12. h3 N4h6 13. Be3 f6 14. Nb3+ Kc6 15. g4 Be6 16. Bg2 Kb6 17. Nxc5 Bxc4 18. Ne6+ Ka5 19. Nfd4 Rc8 20. Kb1 Ka6 21. Nxf8 Rxf8 22. Nc2 b6 23. Nb4+ Kb5 24. Bc6+ Ka5 25. Rd4 b5 26. Rd6 Ka4 27. Bf3 a5 28. Bd1+ Bb3 29. Bxb3+ Kxb3 30. Rd3+ Ka4 31. b3+ Kxa3 32. Nc2# 1-0

& a loss vs Wilhelm Sohn (Zabludowski blundered at move 19) on p. 176-177 of the DSZ 6.1899:

[Event "First Baltic Tournament - Major"]
[Site "Riga"]
[Date "1899.04.13"]
[White "Sohn, Wilhelm"]
[Black "Zabludowski, J."]
[Result "1-0"]
[ECO "D32"]
[PlyCount "49"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bf4 c5 5. e3 a6 6. cxd5 exd5 7. Nf3 Nc6 8. dxc5 Bxc5 9. Bg5 Bb4 10. Rc1 Be6 11. Nd4 O-O 12. Bd3 Ne5 13. O-O Bd6 14. Bb1 h6 15. Bh4 g5 16. Bg3 Kg7 17. Qc2 Qd7 18. f4 gxf4 19. Rxf4 Neg4 20. Nxe6+ Qxe6 21. Rxg4+ Nxg4 22. Qh7+ Kf6 23. Bh4+ Ke5 24. Qg7+ f6 25. Bg3# 1-0

He was in the Bialystok Ghetto, the Germans entered Bialystok on 27 June 1941.

From everywhere Germans had driven the Jews in the direction of the Great Synagogue, with about eight hundred inside, they set fire to the building. Those who managed to escape from the burning building were shot. Those who resisted being pushed inside were shot.

Until late that day Jews were driven into the burning building, shot on the streets and in their houses.

Among those who died in the burning Synagogue was Zabludowski.

Source
The Holocaust - Martin Gilbert, page 161

The page of Testimony in Yad Vashem Holocaust Memorial museum including also the date of death - June 27, 1941.