Patricia 4

[jefk]

with the jja book conversion tool the polyglot gambits
book could be converted to a decent .abk book, i guess
https://lib.rs/crates/jja
(converting to .ctg probably wouldn't work or give sufficient quality)

NB as may be clear from an earlier posting, i don't believe
in one specific P4 book, for lower ranker opponents let's say
up to -200 lower Elo, my gambits book seems to work quite
well, but against equal strength, and especially higher strength
opponents, you better can use a more solid book, eg perfect
or elo2600 or possibly Hert (with sufficient calculation time
only up to 8 ply or so, letting P4 finding the next moves)

[jefk]

a preliminary CB/Fritz (.ctg) gambit book, made from P3 and P4 games
(in winboard, most often against crafty, using my gambits polyglot book):

https://www.dropbox.com/scl/fi/akfxadx1 ... bwc6s&dl=0

(not tested yet myself) it probably won't choose a gambit so often
as the polyglot book, but for the CB addicts maybe worth a try (note I
may update it later with -importing- more games and/or booklearning

[Ponti]

I´d like to play some games against Patricia (the goal is to train my defensive skills).
Tried version 4.0, obviously it destroys me, but it is really fun. Current score is 0-5 .
(I used to train this against the old Gambit Tiger and the old chess system Tal ).

My question is: for this purpose , which is the best version , 3 or 4.0 ?
I understood that version 3 makes more sacrifices, am I wrong ?

[jefk]

while i'm not the P4 helpdesk:

P3 had a lower rating (3000 or so), but indeed sometimes more spectacular
play; for P3 and P4 there also are skill levels, so you could set it at eg.
around 2100 (level x) for your purposes (defending positions); although i'm
not sure in which GUI's (Fr/CB?) this Uci option (skill level) works.

Although according to some here i'm only a 'hobbyist' (just like someone as a
certain mr Kaufman apparently (lol)), educational purposes of chess software
imo are quite interesting; for me the idea of emulating a P4 style, playing
with gambits is my biggest interest, but indeed, the importance of defensive skills
in chess are often underestimated and both engines (P3 & P4) probably can be
useful and interesting tools.

[jefk]

small update, won a game with Black against P3.1, skill level 10 (instead
of 20) and UCI_elo 1900, total time for game 30 mins (each side)
in Chessparter GUI (CP6.1); so setting lower levels for P3 works fine.

Later today going to try P4, and then possibly higher levels (got some odd moves
by P3, was nevertheless exciting game, especially endgame)

[jefk]

now also done a test game against P4 in the CB GUI (P4 Uci option
skill level 10, didn't see a 'UCI-limit-strength- in the Fritz GUI)

with the small p34gamb.ctg as made earlier, P4 played 1..e5 against
my 1.d4 (Englund gambit) got quickly out of book, and then used an awful lot of time
for the first moves in the opening phase (something for the programmer (Adam K)
to consider/improve (to take up to 3 to 4 minutes for the every move until move
ten or so in rapid after move 3 out of book is really to slow imo, and leaves
not much/ imo insufficient time in the middle game/endgame).

Made a draw with one takeback as was allowed in the Fr19 GUI (got some sort of kings attack
against my White king, to which i paid a lot of attention, but then missed a little tactic
on the other side of the board (with a black knight in the middle on d4).

PS not sure if P4 really played weaker (with the level10 option), in the post mortem
analysis with F19 there were no mistakes (contrary to P3 in my previous game).
maybe i'll try again with the CP6 interface, otherwise i prefer P3 to play against
in weakened mode, as a human patzer.

[clyjspdxk]

Patricia 4.0 for Android:
https://sourceforge.net/projects/chess- ... p/download

Patricia 4.0 for Android (APK):
https://sourceforge.net/projects/chess- ... k/download

Hello Achimedes, could you make the Stormphrax 6.0.0 for Android? ur file only have the 4.1.0 version. Pleeeeease, thank u.

[Damir]

You need to create a separate thread. This thread is about Patricia engine.

[Rowen]

now also done a test game against P4 in the CB GUI (P4 Uci option
skill level 10, didn't see a 'UCI-limit-strength- in the Fritz GUI)

with the small p34gamb.ctg as made earlier, P4 played 1..e5 against
my 1.d4 (Englund gambit) got quickly out of book, and then used an awful lot of time
for the first moves in the opening phase (something for the programmer (Adam K)
to consider/improve (to take up to 3 to 4 minutes for the every move until move
ten or so in rapid after move 3 out of book is really to slow imo, and leaves
not much/ imo insufficient time in the middle game/endgame).

Made a draw with one takeback as was allowed in the Fr19 GUI (got some sort of kings attack
against my White king, to which i paid a lot of attention, but then missed a little tactic
on the other side of the board (with a black knight in the middle on d4).

PS not sure if P4 really played weaker (with the level10 option), in the post mortem
analysis with F19 there were no mistakes (contrary to P3 in my previous game).
maybe i'll try again with the CP6 interface, otherwise i prefer P3 to play against
in weakened mode, as a human patzer.

Seems to be a problem with Patricia 4 skill levels at least with Fritz GUI. I noticed that I couldn't beat Patricia 4 compared with skill levels set with Patricia 3 that I could win with. I then played a set of blitz engine games Patricia 4 verses Patricia 3. Patricia 4 with skill level 1 set was beating full strength Patricia 3. I noticed a similar thing with the latest Patricia 4 development version.