Maehrisch Ostrau (Moravska Ostrava) 1933 (2-12 July) <Petrovs shared 8th>, behind E. Gruenfeld, E. Eliskases, L. Steiner, and others. Fride, p.9; Di Felice,"Chess Results 1931-1935" p.171

Crosstable

             1 2 3 4 5 6 7 8 9 0 1 2  Pts
1  Gruenfeld * 0 1 ½ ½ 1 ½ 1 ½ ½ 1 1  7.5
2  Eliskases 1 * ½ ½ 1 0 ½ 0 1 ½ 1 1  7.0
3  Steiner   0 ½ * 1 0 1 ½ 1 1 ½ ½ 1  7.0
4  Zinner    ½ ½ 0 * 1 ½ ½ 1 0 1 1 1  7.0
5  Canal     ½ 0 1 0 * 1 ½ 1 ½ 1 ½ ½  6.5
6  Foltys    0 1 0 ½ 0 * 1 ½ ½ 1 1 1  6.5
7  Rejfir    ½ ½ ½ ½ ½ 0 * ½ 1 ½ 1 1  6.5   
8  Gilg      0 1 0 0 0 ½ ½ * 1 ½ ½ 1  5.0
9  Petrov    ½ 0 0 1 ½ ½ 0 0 * ½ 1 1  5.0 
10 Pirc      ½ ½ ½ 0 0 0 ½ ½ ½ * 0 1  4.0
11 Pitschak  0 0 ½ 0 ½ 0 0 ½ 0 1 * 0  2.5
12 Herzog    0 0 0 0 ½ 0 0 0 0 0 1 *  1.5

Di Felice, "Chess Results 1936-1940" p.161

Phew. Isn't this in Scxazhhistuu also.
http://www.digitalniknihovna.cz/mzk..., Národni Listy 3 July 1933 p. 6:

Round 1 July 2:
Zinner - Pirc, Steiner - Petrov, Herzog - Canal, Rejfir - Grünfeld, Foltys - Pitschak, Gilg - Eliskases

http://www.digitalniknihovna.cz/mzk..., Národni Listy 4 July 1933 p. 2:

Round 2 July 3:
Foltys - Gilg, Canal - Pirc, Steiner - Zinner, Rejfir - Herzog, Petrov - Pitschak, Eliskases - Grünfeld

Cannot find ref. for round 3. Inferred:

Round 3 July 4:
Petrov – Foltys, Gilg – Grünfeld, Zinner – Pitschak, Rejfir – Pirc, Eliskases – Herzog, Canal - Steiner

http://www.digitalniknihovna.cz/mzk..., Národni Listy 7 July 1933 p. 4 (which also lists round 5):

Round 4 July 5:
Gilg - Petrov, Zinner – Foltys, Canal – Pitschak, Rejfir – Steiner, Eliskases – Pirc, Grünfeld - Herzog

https://library.hungaricana.hu/hu/v..., Prágai Magyar Hirlap, 8 July 1933, p. 8: "Mährisch-0strau, julius 7. The fifth round of mährisch-ostrau international chess competition was played yesterday" (= July 6th):

Round 5 July 6:
Steiner - Eliskases, Pirc - Grünfeld, Canal 1 Foltys, Gilg 1 Herzog, Pitschak 0 Rejfir, Petrov adj (?) Zinner

http://www.digitalniknihovna.cz/mzk..., Národni Listy 8 July 1933 p. 6:

Round 6 July 7:
Canal – Petrov, Gilg – Zinner, Rejfir – Foltys, Eliskases – Pitschak, Grünfeld – Steiner, Pirc - Herzog

http://www.digitalniknihovna.cz/mzk..., Národni Listy 9 July 1933 p. 2:

Round 7 July 8:
Zinner – Canal, Foltys – Eliskases, Steiner – Herzog, Pirc – Gilg, Pitschak – Grünfeld, Rejfir - Petrov

http://www.digitalniknihovna.cz/mzk..., Národni Listy 10 July 1933 p. 5:

Round 8 July 9:
Grünfeld - Foltys, Gilg - Canal, Rejfir - Zinner, Eliskases - Petrov, Pirc - Steiner, Herzog - Pitschak

http://www.digitalniknihovna.cz/mzk..., Národni Listy 11 July p. 2:

Round 9 July 10:
Foltys - Herzog, Pitschak - Pirc, Canal - Rejfir, Zinner - Eliskases, Petrov - Grünfeld, Steiner - Gilg

http://www.digitalniknihovna.cz/mzk..., Lidove Noviny, 12 July 1933, p. 3:

Round 10 July 11:
Steiner – Pitschak, Rejfir – Gilg, Grünfeld – Zinner, Foltys – Pirc, Petrov – Herzog, Eliskases – Canal

http://www.digitalniknihovna.cz/mzk..., Národni Listu 12 July 1933 p. 2 (gives also rd. 10 and says last round pairings will be):

Round 11 July 12:
Pitschak - Gilg, Foltys - Steiner, Petrov - Pirc, Zinner - Herzog, Canal - Grünfeld, Rejfir - Eliskases

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Vladimir Petrov (kibitz #865)

Wikipedia article: Deutscher Schachverband in der Tschechoslowakei

The first congress was Teplitz-Schönau (1922) , so I suppose Ostrava 1933 would be the 12th.

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Vladimir Petrov (kibitz #868)

chesshistoryinterest: Maehrisch Ostrau 1933: The very good <Tabanus> has beaten me to the punch here. I could add that it was in the mainly German-speaking Sudetenland that the Munich Agreement gave to Hitler in 1938 (the chessically famous Carlsbad was also in the Sudetenland). I found this on a website: <Ostrava is the capital of the Moravian-Silesian Region in the north-eastern part of Czechia. It is the third largest city of the country. The city is divided between the two historical lands of Moravia and Czech Silesia. The Moravian part is called Moravská Ostrava, and the Silesian part is known as Slezská Ostrava. They are separated by the Ostra river.> So that's why there is "Maehrisch" (Moravia) as the first part of the name.

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Round 1 July 2nd

Pirc - Zinner 0-1

Pirc vs E Zinner, 1933

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Steiner - Petrovs 1-0

L Steiner vs Petrov, 1933

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Herzog - Canal 1/2-1/2

F Herzog vs E Canal, 1933

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Gruenfeld - Rejfir 1/2-1/2

Gruenfeld vs J Rejfir, 1933

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Pitschak - Foltys 0-1

R Pitschak vs Foltys, 1933

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Eliskases - Gilg 0-1

Eliskases vs Gilg, 1933

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Round 2 July 3rd

Gilg - Foltys 1/2-1/2

Gilg vs Foltys, 1933

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Canal - Pirc 1-0

E Canal vs Pirc, 1933

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Zinner - Steiner 0-1

E Zinner vs L Steiner, 1933

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Rejfir - Herzog 1-0

J Rejfir vs F Herzog, 1933

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Petrovs - Pitschak 1-0

Petrov vs R Pitschak, 1933

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Eliskases - Gruenfeld 1-0

Eliskases vs Gruenfeld, 1933

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Round 3 July 4

Foltys - Petrovs 1/2-1/2

Foltys vs Petrov, 1933

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Gruenfeld - Gilg 1-0

Gruenfeld vs Gilg, 1933

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Pitschak - Zinner 0-1

R Pitschak vs E Zinner, 1933

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Pirc - Rejfir 1/2-1/2

Pirc vs J Rejfir, 1933

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Herzog - Eliskases 0-1

F Herzog vs Eliskases, 1933

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Steiner - Canal 0-1

L Steiner vs E Canal, 1933

######################################

Round 4 July 5

Gilg - Petrov 1-0

Gilg vs Petrov, 1933

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Zinner – Foltys 1/2-1/2

E Zinner vs Foltys, 1933

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Canal – Pitschak 1/2-1/2

E Canal vs R Pitschak, 1933

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Rejfir – Steiner 1/2-1/2

J Rejfir vs L Steiner, 1933

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Eliskases – Pirc 1/2-1/2

Eliskases vs Pirc, 1933

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Gruenfeld - Herzog 1-0

Gruenfeld vs F Herzog, 1933

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Round 5 July 6

Steiner - Eliskases 1/2-1/2

L Steiner vs Eliskases, 1933

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Pirc - Gruenfeld 1/2-1/2

Pirc vs Gruenfeld, 1933

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Foltys - Canal 0-1

Foltys vs E Canal, 1933

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Herzog - Gilg 0-1

F Herzog vs Gilg, 1933

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Pitschak - Rejfir 0-1

R Pitschak vs J Rejfir, 1933

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Petrovs - Zinner 1-0

Petrov vs E Zinner, 1933

###############################

Round 6 July 7

Canal – Petrov 1/2-1/2

E Canal vs Petrov, 1933

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Gilg – Zinner 0-1

Gilg vs E Zinner, 1933

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Rejfir – Foltys 0-1

J Rejfir vs Foltys, 1933

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Eliskases – Pitschak 1-0

Eliskases vs R Pitschak, 1933

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Gruenfeld – Steiner 1-0

Gruenfeld vs L Steiner, 1933

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Herzog - Pirc 0-1

F Herzog vs Pirc, 1933

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Round 7 July 8

Zinner – Canal 1-0

E Zinner vs E Canal, 1933

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Foltys – Eliskases 1-0

Foltys vs Eliskases, 1933

----------------

Steiner – Herzog 1-0

L Steiner vs F Herzog, 1933

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Pirc – Gilg 1/2-1/2

Pirc vs Gilg, 1933

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Pitschak – Gruenfeld 0-1

R Pitschak vs Gruenfeld, 1933

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Petrov - Rejfir 0-1

Petrov vs J Rejfir, 1933

##############################################

Round 8 July 9

Gruenfeld - Foltys 1-0

Gruenfeld vs Foltys, 1933

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Gilg - Canal 0-1

Gilg vs E Canal, 1933

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Rejfir - Zinner 1/2-1/2

J Rejfir vs E Zinner, 1933

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Eliskases - Petrov 1-0

Eliskases vs Petrov, 1933

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Pirc - Steiner 1/2-1/2

Pirc vs L Steiner, 1933

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Herzog - Pitschak 1-0

F Herzog vs R Pitschak, 1933

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Round 9 July 10

Foltys - Herzog 1-0

Foltys vs F Herzog, 1933

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Pitschak - Pirc 1-0

R Pitschak vs Pirc, 1933

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Canal - Rejfir 1/2-1/2

E Canal vs J Rejfir, 1933

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Zinner - Eliskases 1/2-1/2

E Zinner vs Eliskases, 1933

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Petrov - Gruenfeld 1/2-1/2

Petrov vs Gruenfeld, 1933

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Steiner - Gilg 1-0

L Steiner vs Gilg, 1933

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Round 10 July 11

Gilg - Rejfir 1/2-1/2

Gilg vs J Rejfir, 1933

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Gruenfeld – Zinner 1/2-1/2

Gruenfeld vs E Zinner, 1933

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Pirc - Foltys 0-1

Pirc vs Foltys, 1933

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Herzog - Petrov 0-1

F Herzog vs Petrov, 1933

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Eliskases – Canal 1-0

Eliskases vs E Canal, 1933

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Round 11 July 12

Petrov - Pirc 1/2-1/2

Petrov vs Pirc, 1933

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Pitschak - Gilg 1/2-1/2

R Pitschak vs Gilg, 1933

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Foltys - Steiner 0-1

Foltys vs L Steiner, 1933

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Zinner - Herzog 1-0

Canal - Gruenfeld 1/2-1/2

E Canal vs Gruenfeld, 1933

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Rejfir - Eliskases 1/2-1/2

J Rejfir vs Eliskases, 1933