On Jan 29, 9:42*am, Sanny wrote:

Today GetClub Chess was further Improved. Now it will be very
difficult to win Beginner Level than it used to be earlier . Earlier
Jester used to win in 50-60 Moves. But today it took 67 Moves to win.

I wouldn't base an assement on a single game, but I do have to say
that apart from a few dodgy moves GetClub acquitted itslef pretty well
here. It was even breifly ahead early on. One position in particular
highlights a possible tactical bug that needs to be found and fixed.
The program could be a lot stronger with a bit more debugging.

So far so good....

13. Nc3-a4{10} Qe7-d6{6}

13. .... Bg4 is better

16. Qh5-h4{12} h7-h5{6}

Damaging your own kings refuge for no advantage is not good.
Better is the natural 16. .... Be6

24. Nc3-d1{10} Rb8-b6{6}

This is the pivotal losing move - setting up a Q,R fork for whites N.
And it is worth investigating exactly why the engine failed to see
that the continuation would be so bad for it. Superficially it looks
like an equal exchange at 2 ply plus swapoff to quiessence and it only
shows the problems at deeper levels of lookahead.

24. ... Qd8 would hold the situation and several other moves are
plausible.

r5k1/2p2b2/prpq1p2/4p2p/3bP1pQ/3P4/1PPN1PPP/RR1N2K1 w - - 0 25

In this position the engine should quickly see that the N has to be
captured else NxR or NxQ. Only the bishop can make the capture so BxN
is forced and dxB follows automatically (and in any quiessence
search). The catch here is that whatever black does now he cannot
defend the h5 pawn which the bishop previously protected from whites
Q . Now it would have been much better never to have advanced h5 in
the first place but once it was there it effectively tied down the B
and made the N fork pretty well lethal.

25. Nd2-c4{26} Bf7-c4{6}

The inevitbale swapoff N for B.

26. d3-c4{12} f6-f5{6}

Compounds the problem for black - white now has a choice of 2 pawns
offered to it en prise.
27. Qh4-g5{18} Kg8-f8{10}

But he goes for the check instead. Plenty of time to eat pawns.
27. .... Kf7 would be quite a lot better here, but the K seems
terrified of moving away from the edge of the board.

41. Ra5-a7{12} Bd6-e7{6}

Why gift the e pawn unnecessarily? Kg7 was about the best of a bad
bunch.
There are only 4 worse moves and they all involve sacrificing a rook
for no compensation.

Regards,
Martin Brown