Note that the page linked above says it's outdated, and also that the link it contains is broken. The current private engine list seems to be this one.
I downloaded the small version. There is some files in 7z-file. There is *.wri-file in spanish. An online translation says that the engine is not meant to be distributed. It seems that it's a private e-mail from the author. Weird situation. May be our spanish-speaking friends here can bring more light at the case.
In Arena Qalat is recognized as WB-engine, it's from Debug-window:
6.703*1*Configured Engine 1 Type: WB2
6.828*1*Engine 1 dir: C:\chess\ARENA\arena11\Engines\QALAT
6.858*1*Engine 1 commandline: C:\chess\ARENA\arena11\Engines\QALAT\QalatMini.exe
7.078*1*Engine 1 ProcessID: 3020
7.108<--1:Qalat Chess Engine Version 0.0.14f
7.108<--1:a) Libro
7.108<--1:b) Promociona solo a Dama y Caballo
7.108<--1:c) usa el libro
7.124<--1:d) Libro solo ganadas. Jaque Cache TT
7.124-->1:xboard
7.124-->1:protover 2
7.875<--1:f) cuando hay un r, lo hace con ventana nula
7.875<--1:Modo compilado: RELEASE
7.889<--1:Extension por un unico movimiento del rey en jaque
7.889<--1:Extension en Quiescence por Jaque
7.889<--1:Futility pruning
7.889<--1:Futility Extendido pruning
7.905<--1:Material Incremental
7.905<--1:Test: W1001
7.905<--1:Test: BK
7.905<--1:Usando minilibro
7.905<--1:Tabla de Transposicion: Tamaño Bytes: 2097152 (2M) Posiciones: 65536 (x2) Registro 16
7.905<--1:Tabla de Evaluacion: Tamaño Bytes: 655350 (0M) Posiciones: 65535 0xFFFF Registro 10
7.905<--1:Cargando fichero aperturas. Tamaño registro 22
7.905<--1:Libro Aperturas: 7924 Blancas, 4602 Negras
7.905<--1:Limpiando la TT
7.905<--1:Limpiando la TEval.Limpiada.
7.905<--1:Blancas 1> Entrada: <xboard>
7.905<--1:Error (unknown command): protover
8.796-->1:new
8.796-->1:random
8.796-->1:level 0 1 2
And -- yes, Qalat played a demo-game against AICE 0.99.2 under Arena. Here it is:
I am preparing a website and a pack with some tools and all the chess engine by developers who speak Spanish. All the tools and engines are free download. Despite this I sent an email to developers. All responses were positives for the pack. (With some developers is difficult to contact because many times email addresses no work)
Initially the engine Qalat was considered private, an expert in this world of the engines told me that he has a public version of 2001. Like the rest of developers I sends he a email, unfortunately the e-mail does not work.
As Evgenii said there is a file extension wri, I read and I saw that he asked not to distribute the engine because soon it would be a release free. Reading this It made me doubt if the engine was private or not, this is one of the reasons why I recently delayed the launch of a page.
Now I have to talk to the person who told me about this version of Qalat and she told me that that after reviewing the file, your error, the version is private.
Logically Qalat is removed of the pack (which included it yesterday)
So I ask the moderators that the link is the first message is deleted.
To Carlos Andrade apologize for the mistake. If someone has your email sent me a private message.