Neat Endgame Problem from Reti

[Graham Banks]

Chessmaster is the typical counter example, it has many parameters to tweak and many people devote their time to finding different personalities and watching them play. I don't see why only The King is used for this and not stronger engines like Zappa, or Fruit for that matter.

The Chessmaster parameters are easy to understand. That helps.

[Ovyron]

I find "Null Move Off" easy to understand

[Graham Banks]

I find "Null Move Off" easy to understand

For somebody with no programming knowledge, it's double dutch.

[BubbaTough]

Perhaps a chess personality of one of the engines known for excellent use of Zugzwang or something would have no null or aggressive null verification search or something. I have seen "Tal" engines or "Karpov" engines, are there "Rubenstein" personalities? .

-Sam

[Ovyron]

Yes, I've forgotten what's obvious and what's not.

So it's just about the name of the parameters? That might explain why ProDeo personalities never kicked in, too technical and they used to be full of MISC_19-MISC_28 stuff...

[Graham Banks]

Yes, I've forgotten what's obvious and what's not.

So it's just about the name of the parameters? That might explain why ProDeo personalities never kicked in, too technical and they used to be full of MISC_19-MISC_28 stuff...

Yep.
Look at the simplicity of the adjustable Chessmaster parameters and apart from NagaSkaki, nothing can really compare.

[Rubinus]

[d] 4kr2/5p1K/3p1Q2/1p4P1/4P3/1PP5/7b/8 w - - 0 1

Chess Tiger 14.0:

1.Kg7 Be5 2.b4 Bg3 3.c4 bxc4 4.b5 Be5 5.b6 Bxf6+ 6.gxf6 Kd7 7.Kxf8 c3 8.Kxf7 c2 9.b7 Kc7 10.Ke7 Kxb7
² (0.68) Depth: 19 00:00:15 17538kN
1.Kg7 Be5 2.b4 Bg3 3.c4 bxc4 4.b5 Be5 5.b6 Bxf6+ 6.gxf6 Kd7 7.Kxf8 c3 8.Kxf7 c2 9.b7 Kc7 10.Ke7 Kxb7
² (0.68) Depth: 20 00:00:15 18153kN
1.Kg7 Be5 2.b4 Bg3 3.Qf5 Be5+ 4.Qf6
= (0.07) Depth: 21 00:00:20 23902kN
1.g6 Be5 2.Qxe5+ dxe5 3.g7 Ke7 4.gxf8Q+ Kxf8 5.c4 bxc4 6.bxc4 f5 7.exf5 e4 8.c5 e3 9.c6 Ke7 10.c7
² (0.38) Depth: 21 00:00:52 62182kN
1.Kh6
+- (1.58) Depth: 21 00:01:15 88116kN
1.Kh6
+- (1.58) Depth: 22 00:02:00 141985kN
1.Kh6
² (0.68) Depth: 22 00:02:36 187765kN
1.Kh6
+- (1.58) Depth: 23 00:03:00 215679kN
1.Kh6
+- (1.58) Depth: 24 00:05:45 411901kN
1.Kg7
+- (2.48) Depth: 24 00:07:42 560837kN
1.Kg7
+- (2.48) Depth: 25 00:20:06 1513884kN

25 years ago, my junior training.
1.Kg7 is bad, needed tempo 1.Kh6!
Rybka 3MP/64 after 1.Kg7 (Core Duo 2.26MHz, 1GB hash)

4kr2/5pK1/3p1Q2/1p4P1/4P3/1PP5/7b/8 b - - 0 1
Analysis by Rybka 3:
1...Be5
= (0.00) Depth: 6 00:00:00 0kN
1...Be5
= (0.00) Depth: 7 00:00:00 0kN
1...Be5
= (0.00) Depth: 8 00:00:00 0kN
1...Be5
= (0.00) Depth: 9 00:00:00 0kN
1...Be5
= (0.00) Depth: 10 00:00:00 0kN
1...Be5
= (0.00) Depth: 11 00:00:00 0kN
1...Be5
= (0.00) Depth: 12 00:00:00 1kN
1...Be5
= (0.00) Depth: 13 00:00:00 1kN
1...Be5
= (0.00) Depth: 14 00:00:00 2kN
1...Be5
= (0.00) Depth: 15 00:00:00 4kN
1...Be5
= (0.00) Depth: 16 00:00:00 6kN
1...Be5 2.b4[] Bh2 3.Qh6 Be5+ 4.Qf6[] Bh2 5.Qh6 Be5+ 6.Qf6[] Bh2 7.Qh6 Be5+ 8.Qf6[] Bh2 9.Qh6 Be5+ 10.Qf6[] Bh2 11.Qh6 Be5+ 12.Qf6[] Bh2 13.Qh6 Be5+ 14.Qf6[] Bh2 15.Qh6 Be5+ 16.Qf6[] Bh2
= (0.00) Depth: 17 00:00:00 8kN
1...Be5 2.b4[] Bh2 3.Qh6 Be5+ 4.Qf6[] Bh2 5.Qh6 Be5+ 6.Qf6[] Bh2 7.Qh6 Be5+ 8.Qf6[] Bh2 9.Qh6 Be5+ 10.Qf6[] Bh2 11.Qh6 Be5+ 12.Qf6[] Bh2 13.Qh6 Be5+ 14.Qf6[] Bh2 15.Qh6 Be5+ 16.Qf6[] Bh2
= (0.00) Depth: 18 00:00:00 14kN
1...Be5 2.b4[] Bh2 3.Qh6 Be5+ 4.Qf6[] Bh2 5.Qh6 Be5+ 6.Qf6[] Bh2 7.Qh6 Be5+ 8.Qf6[] Bh2 9.Qh6 Be5+ 10.Qf6[] Bh2 11.Qh6 Be5+ 12.Qf6[] Bh2 13.Qh6 Be5+ 14.Qf6[] Bh2 15.Qh6 Be5+ 16.Qf6[] Bh2
= (0.00) Depth: 19 00:00:00 25kN
1...Be5 2.b4[] Bh2 3.Qh6 Be5+ 4.Qf6[] Bh2 5.Qh6 Be5+ 6.Qf6[] Bh2 7.Qh6 Be5+ 8.Qf6[] Bh2 9.Qh6 Be5+ 10.Qf6[] Bh2 11.Qh6 Be5+ 12.Qf6[] Bh2 13.Qh6 Be5+ 14.Qf6[] Bh2 15.Qh6 Be5+ 16.Qf6[] Bh2
= (0.00) Depth: 20 00:00:00 41kN
1...Be5 2.b4[] Bh2 3.Qh6 Be5+ 4.Qf6[] Bh2 5.Qh6 Be5+ 6.Qf6[] Bh2 7.Qh6 Be5+ 8.Qf6[] Bh2 9.Qh6 Be5+ 10.Qf6[] Bh2 11.Qh6 Be5+ 12.Qf6[] Bh2 13.Qh6 Be5+ 14.Qf6[] Bh2 15.Qh6 Be5+ 16.Qf6[] Bh2
= (0.00) Depth: 21 00:00:01 73kN
1...Be5 2.b4[] Bh2 3.Qh6 Be5+ 4.Qf6[] Bh2 5.Qh6 Be5+ 6.Qf6[] Bh2 7.Qh6 Be5+ 8.Qf6[] Bh2 9.Qh6 Be5+ 10.Qf6[] Bh2 11.Qh6 Be5+ 12.Qf6[] Bh2 13.Qh6 Be5+ 14.Qf6[] Bh2 15.Qh6 Be5+ 16.Qf6[] Bh2
= (0.00) Depth: 22 00:00:02 140kN, tb=2
1...Be5 2.b4[] Bh2 3.Qh6 Be5+ 4.Qf6[] Bh2 5.Qh6 Be5+ 6.Qf6[] Bh2 7.Qh6 Be5+ 8.Qf6[] Bh2 9.Qh6 Be5+ 10.Qf6[] Bh2 11.Qh6 Be5+ 12.Qf6[] Bh2 13.Qh6 Be5+ 14.Qf6[] Bh2 15.Qh6 Be5+ 16.Qf6[] Bh2
= (0.00) Depth: 23 00:00:03 278kN, tb=7
1...Be5 2.b4[] Bh2 3.Qh6 Be5+ 4.Qf6[] Bh2 5.Qh6 Be5+ 6.Qf6[] Bh2 7.Qh6 Be5+ 8.Qf6[] Bh2 9.Qh6 Be5+ 10.Qf6[] Bh2 11.Qh6 Be5+ 12.Qf6[] Bh2 13.Qh6 Be5+ 14.Qf6[] Bh2 15.Qh6 Be5+ 16.Qf6[] Bh2
= (0.00) Depth: 24 00:00:06 445kN, tb=19
1...Be5 2.b4[] Bh2 3.Qh6 Be5+ 4.Qf6[] Bh2 5.Qh6 Be5+ 6.Qf6[] Bh2 7.Qh6 Be5+ 8.Qf6[] Bh2 9.Qh6 Be5+ 10.Qf6[] Bh2 11.Qh6 Be5+ 12.Qf6[] Bh2 13.Qh6 Be5+ 14.Qf6[] Bh2 15.Qh6 Be5+ 16.Qf6[] Bh2
= (0.00) Depth: 25 00:00:11 884kN, tb=38
1...Be5 2.b4[] Bh2 3.Qh6 Be5+ 4.Qf6[] Bh2 5.Qh6 Be5+ 6.Qf6[] Bh2 7.Qh6 Be5+ 8.Qf6[] Bh2 9.Qh6 Be5+ 10.Qf6[] Bh2 11.Qh6 Be5+ 12.Qf6[] Bh2 13.Qh6 Be5+ 14.Qf6[] Bh2 15.Qh6 Be5+ 16.Qf6[] Bh2
= (0.00) Depth: 26 00:00:18 1416kN, tb=62
1...Be5 2.b4[] Bh2 3.Qh6 Be5+ 4.Qf6[] Bh2 5.Qh6 Be5+ 6.Qf6[] Bh2 7.Qh6 Be5+ 8.Qf6[] Bh2 9.Qh6 Be5+ 10.Qf6[] Bh2 11.Qh6 Be5+ 12.Qf6[] Bh2 13.Qh6 Be5+ 14.Qf6[] Bh2 15.Qh6 Be5+ 16.Qf6[] Bh2
= (0.00) Depth: 27 00:00:31 2486kN, tb=168
1...Be5 2.b4[] Bh2 3.Qh6 Be5+ 4.Qf6[] Bh2 5.Qh6 Be5+ 6.Qf6[] Bh2 7.Qh6 Be5+ 8.Qf6[] Bh2 9.Qh6 Be5+ 10.Qf6[] Bh2 11.Qh6 Be5+ 12.Qf6[] Bh2 13.Qh6 Be5+ 14.Qf6[] Bh2 15.Qh6 Be5+ 16.Qf6[] Bh2
= (0.00) Depth: 28 00:00:49 4206kN, tb=334
1...Be5 2.b4[] Bh2 3.Qh6 Be5+ 4.Qf6[] Bh2 5.Qh6 Be5+ 6.Qf6[] Bh2 7.Qh6 Be5+ 8.Qf6[] Bh2 9.Qh6 Be5+ 10.Qf6[] Bh2 11.Qh6 Be5+ 12.Qf6[] Bh2 13.Qh6 Be5+ 14.Qf6[] Bh2 15.Qh6 Be5+ 16.Qf6[] Bh2
= (0.00) Depth: 29 00:01:24 7385kN, tb=688
1...Be5 2.b4[] Bh2 3.Qh6 Be5+ 4.Qf6[] Bh2 5.Qh6 Be5+ 6.Qf6[] Bh2 7.Qh6 Be5+ 8.Qf6[] Bh2 9.Qh6 Be5+ 10.Qf6[] Bh2 11.Qh6 Be5+ 12.Qf6[] Bh2 13.Qh6 Be5+ 14.Qf6[] Bh2 15.Qh6 Be5+ 16.Qf6[] Bh2
= (0.00) Depth: 30 00:02:28 13337kN, tb=1375
1...Be5 2.b4[] Bh2 3.Qh6 Be5+ 4.Qf6[] Bh2 5.Qh6 Be5+ 6.Qf6[] Bh2 7.Qh6 Be5+ 8.Qf6[] Bh2 9.Qh6 Be5+ 10.Qf6[] Bh2 11.Qh6 Be5+ 12.Qf6[] Bh2 13.Qh6 Be5+ 14.Qf6[] Bh2 15.Qh6 Be5+ 16.Qf6[] Bh2
= (0.00) Depth: 31 00:03:46 20373kN, tb=2942

[Rubinus]

4kr2/5p1K/3p1Q2/1p4P1/4P3/1PP5/7b/8 w - - 0 1

1.Kh6!! Se5 2.Kg7!! Sxf6+ 3.ef6 null move problem

Steinwender, Friedel: Chess on PC, 1995 (Czech edition 1997)
Null move off, if
a) previously null move
b) check
c) root search
d) BAD POSITION. (But stupid computer not know bad position, if have rook plus)

My concept is
e) if none move whitout losses material then null move off!
Here: 3.-R*8 4.Kx*8, 3.-b4 4.cb4 or 3.-d5 4.ed5 (and the same problem), 3.-Kd* 4.Kxf8 and white wins

[Rubinus]

Pts e) only if etc max. 10 moves, on account time.

[Rubinus]

e) Null move off, if very better than other moves.
Rybka have detect [] ... if []null move, then ...