Matibay an amazon chess variant engine

[Ferdy]

A variant where the queen is also capable of moving like a knight.

White to play and mate in 7.
[d]1r1R4/QP3k1p/4bp2/8/2q1p3/8/PPP3PP/5R1K w - - 9 34

Download the winboard engine here.
https://sites.google.com/site/deuterium ... les/amazon

[belzedar94]

I just run a tournament to benchmark the available engines for this variant.

Match Fairy-SF 11.2 (23/09/2020) vs vs latest Fairy-SF dev vs SjaakII 1.4.1 vs Matibay v1.1
Variant: Amazon Chess
Tournament: Round-Robin
Binaries: Fairy-SF 11.2, Fairy-SF dev 070121, SjaakII 1.4.1, Matibay v1.1 64bit
Engine Options: 1 thread, 2048 hash, no ponder
Hardware: i7-9750H
Time control: 30+0,3s
Book: Amazon.epd
Tablebases: None
Adjudication: Resign if >1500cp for more than 5 moves
Software: Cutechess
Comments: No perceivable difference since the latest Fairy-SF release. 750 elo above Ferdinand's "Matibay v1.1".

Results:

Code: Select all

Rank Name                                              	 Elo     +/-   Games    Wins  Losses   Draws   Points   Score    Draw   White   Black 
   1 Fairy-SF 11.2 Release (230920) - Classical Eval     284      41     300     217      15      68    251.0   83.7%   22.7%   83.0%   84.3% 
   2 Fairy-SF 070121 - Classical Eval                    265      40     300     211      18      71    246.5   82.2%   23.7%   82.0%   82.3% 
   3 Matibay v1.1 64bit                                 -114      41     300     101     196       3    102.5   34.2%    1.0%   34.0%   34.3% 
   4 SjaakII (check variant)                            -inf     nan     300       0     300       0      0.0    0.0%    0.0%    0.0%    0.0% 

600 of 600 games finished.

ORDO:

Code: Select all

   # PLAYER                                             :  RATING  POINTS  PLAYED   (%)
   1 Fairy-SF 11.2 Release (230920) - Classical Eval    :   773.8   251.0     300    84
   2 Fairy-SF 070121 - Classical Eval                   :   758.4   246.5     300    82
   3 Matibay v1.1 64bit                                 :     0.0   102.5     300    34
   4 SjaakII (check variant)                          < :  -997.1     0.0     300     0

White advantage = -9.59
Draw rate (equal opponents) = 50.00 %

Further details and other variants testing:

https://docs.google.com/spreadsheets/d/ ... sp=sharing

[Pi4Chess]

[Nordlandia]

The Amazon is a scary piece.

https://en.wikipedia.org/wiki/Amazon_(chess)