Problèmes de Jeux et Stratégie n°23

I did not put the computers in a mate finder or infinite level because it is not realistic. Therefore I choose fast levels, and then switched to slower levels when the computer did not find the answer.
Ideally, what I would like to know is "would this computer find the solution in a G/5 game ? in a G/30 game ? in a 40 moves / 2 hours games ?

Problem #1
8  
7
6
5
4
3
2
1
A B C D E F G H
White to Move
1. Ng8#
 
Computer Time Level
Designer 2000 0:32 6 (60m/5)
Designer 2000 Display 0:00 A1 (60m/5)
Par Excellence 0:19 6 (60m/5)
Excel Mach III 0:00 A1 (60m/5)
Mephisto Milano 0:00 0:10
Mephisto Nigel Short 0:00 0:10
Mephisto Polgar 0:00 0:10
Mephisto Berlin 0:00 0:05
Mephisto Milano Pro 0:00 0:05
Mephisto Senator 0:00 0:05
Novag Super Expert C 0:00 C2 (G/5)
Saitek Galileo 0:00 A3 (0:05)
Saitek Renaissance 0:00 A3 (0:05)
Saitek Analyst C 8 MHz 0:04 E1 (0:05)
Saitek Analyst D++ 8 MHz 0:00 E1 (0:05)
Problem #2
8  
7
6
5
4
3
2
1
A B C D E F G H
Blancs au trait - White to move
1.f3 (mate in 2)
 
Computer Time Level
Designer 2000 0:17 7 (60m/15)
Designer 2000 Display 0:18 A2 (60m/10)
Par Excellence 0:14 6 (60m/5)
Excel Mach III ---
Mephisto Milano ---
Mephisto Nigel Short ---
Mephisto Polgar ---
Mephisto Berlin 0:00 0:05
Mephisto Milano Pro 0:03 0:05
Mephisto Senator 0:01 0:05
Novag Super Expert C ---
Saitek Galileo ---
Saitek Renaissance ---
Saitek Analyst C 8 MHz 4:46 E6 (3:00)
Saitek Analyst D++ 8 MHz 1:33 E4 (1:00)

Milano and Nigel Short play Nxc2 (mate in 5). Super Expert plays Dxf4 (mate in 3) : is it really wrong to stop when a mate is found instead of looking for the shortest mate ?
Problem #3
8  
7
6
5
4
3
2
1
A B C D E F G H
White to move
Dc2 (mate in 4) or Re3 (mate in 4)
(two solutions... bug in the problem)
 
Computer Time Level
Designer 2000 ---
Designer 2000 Display ---
Par Excellence ---
Excel Mach III ---
Mephisto Milano 0:47 1:00
Mephisto Nigel Short 0:47 1:00
Mephisto Polgar ---
Mephisto Berlin 0:24 0:15
Mephisto Milano Pro ---
Mephisto Senator ---
Novag Super Expert C ---
Saitek Galileo ---
Saitek Renaissance ---
Saitek Analyst C 8 MHz 2:56 E4 (01:00)
Saitek Analyst D++ 8 MHz 1:44 E4 (01:00)
All programs see Rf5 mate in 5 very fast... same remark as before... Except for Analyst C which finds the shortest mate...
Problem #4
8  
7
6
5
4
3
2
1
A B C D E F G H
Black to move
1... Qxe5+
 
Computer Time Level
Designer 2000 0:13 6 (60m/5)
Designer 2000 Display 0:12 A1 (60m/5)
Par Excellence 0:10 6 (60m/5)
Excel Mach III 0:04 A1 (60m/5)
Mephisto Milano 0:09 0:10
Mephisto Nigel Short 0:05 0:10
Mephisto Polgar 0:08 0:10
Mephisto Berlin 0:03 0:05
Mephisto Milano Pro 0:04 0:05
Mephisto Senator 0:02 0:05
Novag Super Expert C 0:13 C2(G/5)
Saitek Galileo ---
Saitek Renaissance 0:01 A3 (0:05)
Saitek Analyst C 8 MHz 0:01 E1 (0:05)
Saitek Analyst D++ 8 MHz 0:00 E1 (0:05)
Problem #5
8  
7
6
5
4
3
2
1
A B C D E F G H
Black to play
1... Qa5
 
Computer Time Level
Designer 2000 1:00 8 (60m/30)
Designer 2000 Display 0:55 A4 (60m/30)
Par Excellence 0:25 7 (60m/15)
Excel Mach III 0:06 A1 (60m/5)
Mephisto Milano 0:06 0:10
Mephisto Nigel Short 0:06 0:10
Mephisto Polgar 0:07 0:10
Mephisto Berlin 0:16 0:15
Mephisto Milano Pro 0:04 0:05
Mephisto Senator 0:02 0:05
Novag Super Expert C 0:04 C2 (G/5)
Saitek Galileo 0:06 A3 (0:05)
Saitek Renaissance 0:06 A3 (0:05)
Saitek Analyst C 8 MHz 0:01 E1 (0:05)
Saitek Analyst D++ 8 MHz 0:00 E1 (0:05)
Problem #6
8  
7
6
5
4
3
2
1
A B C D E F G H
White to move
gxf6
 
Computer Time Level
Designer 2000 3:29 10 (30m/1H)
Designer 2000 Display 3:07 A6 (30m/1H)
Par Excellence 1:49 9 (60m/1H)
Excel Mach III 2:00 A6 (30m/1H)
Mephisto Milano 2:27 3:00
Mephisto Nigel Short 0:59 1:00
Mephisto Polgar 5:59 6:00
Mephisto Berlin 0:33 0:30
Mephisto Milano Pro 1:30 40cps/2H
Mephisto Senator 1:35 1:00
Novag Super Expert C 1:57 C3 (G/10)
Saitek Galileo ---
Saitek Renaissance ---
Saitek Analyst C 8 MHz ---
Saitek Analyst D++ 8 MHz ---
Problem #7
8  
7
6
5
4
3
2
1
A B C D E F G H
White to move
1.Kc2
 
Computer Time Level
Designer 2000 0:42 6 (60m/5)
Designer 2000 Display 0:12 A1 (60m/5)
Par Excellence 0:26 6 (60m/5)
Excel Mach III 0:04 A1 (60m/5)
Mephisto Milano 0:06 0:10
Mephisto Nigel Short 0:06 0:10
Mephisto Polgar 0:06 0:10
Mephisto Berlin 0:02 0:05
Mephisto Milano Pro 0:11 0:30
Mephisto Senator 0:03 0:05
Novag Super Expert C 0:04 C2 (G/5)
Saitek Galileo ---
Saitek Renaissance ---
Saitek Analyst C 8 MHz 0:01 E1 (0:05)
Saitek Analyst D++ 8 MHz 0:01 E1 (0:05)
Problem #8
8  
7
6
5
4
3
2
1
A B C D E F G H
White to move
1.c6
 
Computer Time Level
Designer 2000 0:20 6 (60m/5)
Designer 2000 Display 0:13 A1 (60m/5)
Par Excellence 0:12 6 (60m/5)
Excel Mach III 0:04 A1 (60m/5)
Mephisto Milano 0:11 0:10
Mephisto Nigel Short 0:09 0:10
Mephisto Polgar 0:08 0:10
Mephisto Berlin 0:04 0:05
Mephisto Milano Pro 0:03 0:05
Mephisto Senator 0:02 0:05
Novag Super Expert C 0:04 C2 (G/5)
Saitek Galileo 0:07 A3 (0:05)
Saitek Renaissance 0:14 A4 (0:15)
Saitek Analyst C 8 MHz 1:41 E6 (3:00)
Saitek Analyst D++ 8 MHz 1:55 E6 (3:00)
Problem #9
8  
7
6
5
4
3
2
1
A B C D E F G H
White to move
1.g5+
 
Computer Time Level
Designer 2000 ---
Designer 2000 Display ---
Par Excellence ---
Excel Mach III 1:16 A6 (30m/1H)
Mephisto Milano 2:59 3:00
Mephisto Nigel Short 2:59 3:00
Mephisto Polgar 2:59 3:00
Mephisto Berlin 0:22 0:30
Mephisto Milano Pro 0:27 0:30
Mephisto Senator 0:08 0:05
Novag Super Expert C 0:04 C2 (G/5)
Saitek Galileo ---
Saitek Renaissance ---
Saitek Analyst C 8 MHz ---
Saitek Analyst D++ 8 MHz ---