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Subject: Re: My Favorite Chess Problem

Author: Rory Nolan

Date: 06:08:40 03/15/02

Go up one level in this thread


On March 15, 2002 at 04:42:23, Lyn Harper wrote:

>On March 15, 2002 at 01:22:22, Rodney Topor wrote:
>
>>On March 14, 2002 at 20:19:58, Art Basham wrote:
>>
>>>Someone here posted this problem about 2 months ago,
>>>and I just "fell in love" with it..!
>>>
>>>White plays 1. Ne3-g4+ and mates in 30...WITHOUT a Queen on the board!
>>>
>>>Be sure to play this out to the end, and see the beauty found in this
>>>unique chess masterpiece!
>>>
>>>[D]5n2/B3K3/2p2Np1/4k3/7P/3bN1P1/2Prn1P1/1q6 w - -
>>>
>>>My Crafty engine ann. "mate in 30" in only 25 sec...!
>>>
>>>Have fun with it!
>>
>>MacChess 5.0.1 on a 350MHz Mac G3 finds the solution instantly.
>>  Well CM8 gives the right starting move, but no mate announced. Same
>  with Fritz4. Not even given an hour on fast hardware.
>>Rodney
F7 New game
5n2/B3K3/2p2Np1/4k3/7P/3bN1P1/2Prn1P1/1q6 w - - 0 1

Analysis by Fritz 7:

1. +- (4.60): 1.Neg4+ Kf5 2.Nh6+ Ke5 3.Nf7+ Kf5 4.Nd6+ Ke5 5.Ng4+ Kd5 6.c4+ Bxc4
7.Ne3+ Ke5 8.Ndxc4+
2. = (0.00): 1.Nfg4+ Ke4 2.Nf2+ Ke5 3.Nfg4+ Ke4 4.Nf2+ Ke5 5.Nfg4+ Ke4 6.Nf2+
Ke5 7.Nfg4+ Ke4 8.Nf2+
3. -+ (-16.56): 1.Bd4+ Kxd4 2.Kxf8 Qb4+ 3.Ke8 Qb8+ 4.Kf7 Qb7+
4. -+ (-18.34): 1.Ne8 Qb4+ 2.Kf7 Bc4+ 3.Nxc4+ Qxc4+ 4.Kxf8 Rd7 5.Bb8+ Kd4 6.Ba7+
Rxa7 7.Nd6 Qe6 8.c3+

(Nolan, Sutton 15.03.2002)

 F7 doesn't announce mate on my comp:(

00:00:00.0	4.36	11	253588	Neg4+ Kf5 Nh6+ Ke5 Nf7+ Kf5 Nd6+ Ke5 Ng4+ Kd5 c4+ Bxc4
Ne3+ Ke5 Ndxc4+ Ke4 Nxd2+
00:00:00.0	4.44	11	263996	Neg4+ Kf5 Nh6+ Ke5 Nf7+ Kf5 Nd6+ Ke5 Ng4+ Kd5 c4+ Bxc4
Ne3+ Ke5 Ndxc4+ Ke4 Nxd2+
00:00:00.1	4.44	12	504134	Neg4+ Kf5 Nh6+ Ke5 Nf7+ Kf5 Nd6+ Ke5 Ng4+ Kd5 c4+ Bxc4
Ne3+ Ke5 Ndxc4+ Ke4 Nxd2+
00:00:01.2	4.44	13	1027222	Neg4+ Kf5 Nh6+ Ke5 Nf7+ Kf5 Nd6+ Ke5 Ng4+ Kd5 c4+
Bxc4 Ne3+ Ke5 Ndxc4+ Ke4 Nxd2+
00:00:03.5	4.86	14	2168009	Neg4+ Kf5 Nh6+ Ke5 Nf7+ Kf5 Nd6+ Ke5 Ng4+ Kd5 c4+
Bxc4 Ne3+ Ke5 Ndxc4+ Ke4 Nxd2+
00:00:07.0	4.86	15	4560755	Neg4+ Kf5 Nh6+ Ke5 Nf7+ Kf5 Nd6+ Ke5 Ng4+ Kd5 c4+
Bxc4 Ne3+ Ke5 Ndxc4+ Ke4 Nxd2+
00:00:19.7	4.84	16	12303864	Neg4+ Kf5 Nh6+ Ke5 Nf7+ Kf5 Nd6+ Ke5 Ng4+ Kd5 c4+
Bxc4 Ne3+ Ke5 Ndxc4+ Ke4 Nxd2+
00:00:42.1	5.23	17	27281337	Neg4+ Kf5 Nh6+ Ke5 Nf7+ Kf5 Nd6+ Ke5 Ng4+ Kd5 c4+
Bxc4 Ne3+ Ke5 Ndxc4+ Ke4 Nxd2+

Not does gambit-tiger 2

athlon xp1900+ 256mb ram for hash on F7 and 96mb for hash in Rebel

I wonder why?







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