Preliminary arrangements appeared in the <British Chess Magazine>, August 1889, p.318. Of course, they also appeared in the German tournament book cited below, but I'm not going to inflict that on you or myself.

"An International Chess Congress will be held at the Cafe Red Lion, Vygendam, Amsterdam, beginning on August 25th. There will be three classes, the first to consist only of acknowledged foreign masters, and some of the strongest Dutch players. Hours of play, 12 to 4 pm., and 6-30 to 10-30, each competitor to play one game with every other and two games each day, except on three evenings of the week, when unfinished games will be played out. If the entries do not exceed seven, it will be a two-round tourney. Time limit, 18 moves per hour. The committee will decide in which class each competitor will play."

These players impressed the Committee sufficiently to gain admittance to the top group:

Johann Hermann Bauer Amos Burn Arnold van Foreest Isidor Gunsberg Emanuel Lasker Robinson Kay Leather Rudolf Loman James Mason Louis van Vliet.

Of these, Burn, Gunsberg, and Mason were already veteran Masters. Bauer and Lasker were less experienced interationally, having qualified as Masters by winning <Hauptturniers> at the German National Congress. Lasker, indeed, had done so only a month earlier.

Van Foreest was the current Dutch champion. Loman and Van Vliet were native Dutch players, though they resided in London at the time. Finally, there's Mr. Leather, a professor at Liverpool University. There is a report that Blackburne had entered and was expected to play, so Leather might have been promoted from a lower section to produce an even number of players. When Blackburne never showed up, Leather was allowed to remain in the Master section though he proved to be outclassed.

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Round 1 (Monday, August 26)

1 Van Foreest 0 Gunsberg
2 Mason       ½ Burn
3 Loman       1 Leather
4 Lasker      1 Bauer
  Bye - Van Vliet 

<1.0>: Gunsberg*, Lasker* Loman*
<0.5>: Burn*, Mason*
<0.0>: Bauer*, Leather*, van Foreest*, van Vliet

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Round 2 (Monday, August 26)

5 Loman     ½ Gunsberg
6 Lasker    1 Van Foreest
7 Mason     ½ Bauer**
8 Van Vliet 1 Leather
  Bye - Burn

<2.0>: Lasker*
<1.5>: Gunsberg*, Loman*
<1.0>: Mason*, Van Vliet
<0.5>: Bauer*, Burn
<0.0>: Leather*, Van Foreest*

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Round 3 (Tuesday, August 27)

9  Loman     0 Lasker
10 Mason     1 Van Foreest
11 Van Vliet ½ Gunsberg
12 Burn      1 Bauer
   Bye - Leather

<3.0>: Lasker*
<2.0>: Gunsberg*, Mason*
<1.5>: Burn, Loman*, Van Vliet
<0.5>: Bauer*
<0.0>: Van Foreest*, Leather

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Round 4 (Wednesday, August 28)

13 Mason     1 Loman
14 Van Vliet 1 Lasker
15 Burn      1 Van Foreest
16 Leather   0 Gunsberg
   Bye - Bauer

<3.0>: Gunsberg*, Lasker*, Mason*
<2.5>: Burn, Van Vliet
<1.5>: Loman*
<0.5>: Bauer
<0.0>: Van Foreest*, Leather

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Round 5 (Wednesday, August 28)

17 van Vliet ½ Mason
18 Burn      1 Loman
19 Leather   0 Lasker
20 Bauer     ½ Van Foreest
   Bye - Gunsberg

<4.0>: Lasker*
<3.5>: Burn, Mason*
<3.0>: Gunsberg, Van Vliet
<1.5>: Loman*
<1.0>: Bauer
<0.5>: Van Foreest*
<0.0>: Leather

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Round 6 (Friday, August 30)

21 Burn     1 Van Vliet
22 Leather  0 Mason
23 Bauer    1 Loman
24 Gunsberg 0 Lasker
   Bye - Van Foreest

<5.0>: Lasker*
<4.5>: Burn, Mason*
<3.0>: Gunsberg, Van Vliet
<2.0>: Bauer
<1.5>: Loman*
<0.5>: Van Foreest
<0.0>: Leather

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Round 7 (Friday, August 30)

25 Leather     0 Burn
26 Bauer       0 Van Vliet
27 Gunsberg    ½ Mason
28 Van Foreest 0 Loman
   Bye - Lasker

<5.5>: Burn
<5.0>: Lasker, Mason*
<4.0>: Van Vliet
<3.5>: Gunsberg
<2.5>: Loman*
<2.0>: Bauer
<0.5>: Van Foreest
<0.0>: Leather

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Round 8 (Saturday, August 31)

29 Bauer       1 Leather
30 Gunsberg    0 Burn
31 Van Foreest ½ Van Vliet
32 Lasker      ½ Mason
   Bye - Loman

<6.5>: Burn
<5.5>: Lasker, Mason*
<4.5>: Van Vliet
<3.5>: Gunsberg
<3.0>: Bauer
<2.5>: Loman
<1.0>: Van Foreest
<0.0>: Leather

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Round 9 (Sunday, September 1)

33 Gunsberg    ½ Bauer
34 Van Foreest + Leather**
35 Lasker      ½ Burn
36 Loman       ½ Van Vliet
   Bye - Mason

Bauer had a chance to take fifth place with a win, and resorted to an early version of the Pirc. Gunsberg had the advantage most of the way in a long game, but Bauer was able to hold.

Leather decided to end his tournament a round early. Can't say I blame him.

              1 2 3 4 5 6 7 8 9
1 Burn        * = = 1 1 1 1 1 1 7.0
2 Lasker      = * = 0 1 1 1 1 1 6.0
3 Mason       = = * = = = 1 1 1 5.5
4 Van Vliet   0 1 = * = 1 = = 1 5.0
5 Gunsberg    0 0 = = * = = 1 1 4.0
6 Bauer       0 0 = 0 = * 1 = 1 3.5
7 Loman       0 0 0 = = 0 * 1 1 3.0
8 Van Foreest 0 0 0 = 0 = 0 * 1 2.0
9 Leather     0 0 0 0 0 0 0 0 * 0.0

British Chess Magazine, August 1889, p.318:

Der Internationale Schachkongress zu Amsterdam im August 1889 / bearbeitet von Jur. Das. D van Foreest und Cand.-Jur. L. D. Tresling. Utrecht : J.E. Beijers, 1891.

Yenowine's News, September 29, 1889.