Douglas Modern Chess, Season 2 Heat 2

Herewith the results from heat 2 (final heat). Time control was 5 minutes plus 10 seconds per move.

Summary:
Games: 12; Draws: 6, DrawPercentage: 50 %
Whitewins: 3; Blackwins: 3, Draws: 6

Conventional scoring:

Raubfisch X41d3._sl  : 5.5
Stockfish 11         : 3
Fire_7.1_x64         : 2
xiphos-0.6-linux-sse : 1.5

Results table:

Engine                    Win     Draw    Lose
Raubfisch X41d3._sl       5 [3/2] 1 [0/1] 0 [0/0]
Stockfish 11              1 [0/1] 4 [3/1] 1 [0/1]
Fire_7.1_x64              0 [0/0] 4 [2/2] 2 [1/1]
xiphos-0.6-linux-sse      0 [0/0] 3 [1/2] 3 [2/1]

My scoring system which takes black/white into account:

Raubfisch X41d3._sl  : 14.08
Stockfish 11         : 7.98
Fire_7.1_x64         : 0.11
xiphos-0.6-linux-sse : -2.42

My points-based scoring system, which takes black/white and number of moves into account:

Engine                 Points  Percentage
Raubfisch X41d3._sl  : 274   : 91.33 %
Stockfish 11         : 150   : 50 %
Fire_7.1_x64         : 100   : 33.33 %
xiphos-0.6-linux-sse : 76    : 25.33 %

Cutechess scoring:

Rank Name                  Elo +/- Games Score Draws
1    Raubfisch X41d3._sl   417 nan 6     91.7% 16.7%
2    Stockfish 11            0 173 6     50.0% 66.7%
3    Fire_7.1_x64         -120 162 6     33.3% 66.7%
4    xiphos-0.6-linux-sse -191 238 6     25.0% 50.0%

So Fire and Xiphos drop out, and Raubfisch and Stockfish go through to the semi-finals.

Here are the games themselves. The “Mate of the Match” award goes to Xiphos-Stockfish match (second one below).

Continue reading

Douglas Modern Chess, Season 2 Heat 1

Herewith the results from heat 1. Time control was 5 minutes plus 10 seconds per move.

Summary:
Games: 12; Draws: 4, DrawPercentage: 33.3%
Whitewins: 5; Blackwins: 3, Draws: 4

Conventional scoring:

Raubfisch_ME262_GTZ20d3._sl : 5.5
Zeus 4.1.7 M                : 4
rofChade 2.203              : 1.5
Komodo 11                   : 1

Results table:

Engine                     Win     Draw     Lose
Raubfisch_ME262_GTZ2       5 [3/2] 1 [0/1]  0 [0/0] 
Zeus 4.1.7 M               3 [2/1] 2 [1/1]  1 [0/1]
rofChade 2.203             0 [0/0] 3 [2/1]  3 [1/2] 
Komodo 11                  0 [0/0] 2 [1/1]  4 [2/2]

My scoring system which takes black/white into account:

Raubfisch_ME262_GTZ20d3._sl : 16.46
Zeus 4.1.7 M                : 10.18
rofChade 2.203              : -2.9
Komodo 11                   : -9.89

My points-based scoring system, which takes black/white and number of moves into account:

Engine                        Points  Percentage
Raubfisch_ME262_GTZ20d3._sl : 274   : 91.33%
Zeus 4.1.7 M                : 198   : 66%
rofChade 2.203              : 74    : 24.67%
Komodo 11                   : 50    : 16.67%

Cutechess scoring:

Rank Name                        Elo +/- Games Score Draws
1    Raubfisch_ME262_GTZ20d3._sl 417 nan 6     91.7% 16.7%
2    Zeus 4.1.7 M                120 333 6     66.7% 33.3%
3    rofChade 2.203             -191 238 6     25.0% 50.0%
4    Komodo 11                  -280 nan 6     16.7% 33.3%

So Raubfisch_ME262_GTZ20d3._sl and Zeus 4.1.7 M  go through to the semi-finals.

Herewith the games. Mate of the Match award goes to the Raubfisch_ME262_GTZ20d3._sl vs Zeus 4.1.7 M game, towards the bottom.

Continue reading

The closer you watch, the less you see.

Continues from Part 1.

The second lemma needs to be deduced from reading these pages from chapter two of Christopher Milbourne’s Illustrated History of Magic published in 1975. (Dear publisher: please treat this as free advertising for your wonderful book.). Yes it’s all relevant, and it starts off with a story about Khufu. Click to enlarge for easier reading.

Continue reading

Some thoughts on the cubit (and foot)

According to the historians, the cubit is an ancient measure based on the length of the arm plus hand, like this:

Cubit and Royal cubit.

where the normal cubit is 6 palms long, and the Royal Cubit 7 palms long. Well, that’s one explanation of the origin. The other is that they got it from the gods, a long long time ago.

Now there are several problems with the common cubit as shown above. In the first place, it’s generally accepted as being 17.6 or 18 inches long. That’s 44.7 to 45.7 cm.

Continue reading