Computer Chess Club Archives


Search

Terms

Messages

Subject: Re: Paul's 15 mates (long: with diagrams)

Author: Heiner Marxen

Date: 18:20:12 01/25/01

Go up one level in this thread


On January 23, 2001 at 19:34:17, Paul wrote:

>On January 23, 2001 at 18:04:58, Pete Galati wrote:
>
>>On January 23, 2001 at 16:14:07, Paul wrote:
>>
>>>
>>>Thanks Pete! This is kinda funny, as I was putting all those D's in front
>>>and you are editing them out again :) I should've added these lines below
>>>the others, oh well ... there's always a next time ... have fun!
>>>
>>>Paul
>>
>>I'm far too lazy to do that manually, I used the PFE editor's "replace" command
>>to replace the all the [D]'s with nothing.  Thanks for the positions.  Do you
>>have a list of best moves for those?

Now they are back, those diagrams!  :-)
Otherwise the PVs are a bit hard to follow.

>>Pete
>
>Ahhhh ... well actually, no! But I've just put them thru Pretz and I will try
>to post the pv's, that should give you enough info :) Wish I knew how to edit
>them so that they'll show up nicely the first time, but I think this is gonna
>be messy, so bear with me, I'm no Dann Corbit!

All computations done with Chest on a K7/600 with 350 MB hash.


>[D]3r1r1k/1b4pp/ppn1p3/4Pp1R/Pn5P/3P4/4QP2/1qB1NKR1 w - - id 01 WM18; pv Rxh7+ Kxh7
>Qh5+ Kg8 Rxg7+ Kxg7 Bh6+ Kh7 Bg5+ Kg7 Qh6+ Kf7 Qf6+ Kg8 Qg6+ Kh8 Bf6+ Rxf6 exf6
>Qxe1+ Kxe1 Nc2+ Kf1 Ne3+ fxe3 Rd7 Qe8+ Kh7 Qxd7+ Ne7 Qxe7+ Kg6 Qg7+ Kh5 Qg5x

There is no mate in 9.  23.3 min.  This one is obviously far too deep
for Chest.

>[D]1kbr3r/pp6/8/P1n2ppq/2N3n1/R3Q1P1/3B1P2/2R2BK1 w - - id 02 WM11; pv Qf4+ gxf4
>Bxf4+ Ne5 Bxe5+ Rd6 Bxd6+ Ka8 Nb6+ axb6 axb6+ Na6 Rxc8+ Rxc8 Rxa6+ bxa6 Bg2+ Qf3
>Bxf3+ Rc6 Bxc6x

Chest confirms this and gives the exact same PV.  2.4 hrs.


>[D]8/7n/7P/8/6nK/5k2/8/8 b - - id 03 BM10; pv Ngf6 Kh3 Ng5+ Kh4 Nfh7 Kh5 Kg3 Kg6
>Kg4 Kg7 Kf5 Kh8 Kf6 Kg8 Kg6 Kh8 Nf6 h7 Nf7x

Chest confirms this and gives the exact same PV.  2.0 min.


>[D]rnbq1b1r/p1pp1p1p/4k3/1p1NP1p1/2QP1p2/5N2/PP1B1KPP/n6R w - - id 04 WM10; pv
>Nxg5+ Qxg5 Nxc7+ Ke7 Nd5+ Ke6 Nxf4+ Ke7 Nd5+ Ke8 Qxc8+ Qd8 Nc7+ Ke7 Bb4+ d6
>Bxd6+ Qxd6 Qe8x

There is no mate in 8.  2.4 hrs.  Too deep for Chest.


>[D]4r1k1/rp2Bppp/p1b5/1q2Q3/R7/1P5P/P4PP1/3R2K1 w - - id 05 WM10; pv Qxg7+ Kxg7
>Rg4+ Qg5 Rxg5+ Kh6 Rd6+ f6 Rxf6+ Kxg5 f4+ Kh5 g4+ Kh4 Kh2 h5 Rf5+ Rxe7 Rxh5x

There is no mate in 8.  13.3 min.  I could try this one with depth=9.
depth=10 would take nearly a day.  Maybe later.


>[D]r1b2rk1/4bppp/p2p3P/q1n1p1P1/1p1QPP2/1BN1B3/PPP5/2KR3R w - - id 06 WM9; bm Nd5

There is no mate in 9, here.  In another post you said so, already.
47.6 min.

>[D]N7/PPPPPPPP/K1k3rB/b1pnnb1p/8/1r6/pp3p2/7q w - - id 07 WM8; pv b8=N+ Rxb8
>axb8=N+ Kd6 c8=N+ Ke6 d8=N+ Bxd8 exd8=N+ Kf6 g8=N+ Rxg8 hxg8=N+ Kg6 f8=Nx

Chest confirms this and gives the exact same PV.  0.40 sec.
That was easy ;-)


>[D]7k/2p4P/1p2p2K/2P5/8/8/4PP2/8 w - - id 08 WM8; pv cxb6 cxb6 e4 b5 f4 b4 f5 exf5
>exf5 b3 f6 b2 f7 b1=Q f8=Qx

Chest confirms this and gives the following PV (1.09 sec):
cxb6 cxb6 f4 b5 e4 b4 f5 exf5 e5 =*= e6 =*= e7 =*= e8=Q#
(=*= is "any move")


>[D]rnb1r2k/pp2NR1p/6p1/2p1b1B1/2P5/8/q3B1PP/1R1Q2K1 w - - id 09 WM7; pv Qd6 Qxb1+
>Bf1 Bg7 Bf6 Qb2 Bxb2 Bxb2 Rxh7+ Kxh7 Qxg6+ Kh8 Qh6x

Chest confirms this and gives the following PV (7.2 min):
Qd6 Bg7 Bf6 Qxb1+ Bf1 Qa1 Bxa1 Bxa1 Rxh7+ Kxh7 Qxg6+ Kh8 Qh6#

>[D]r1br4/1p2npkp/3Bpbp1/pqp5/2N1R3/1P1P1QP1/1PP2PBP/R5K1 w - - id 10 WM7; pv Qxf6+
>Kxf6 Be5+ Kg5 Bg7 Rxd3 cxd3 Kh5 Bf3+ Kg5 Re5+ Nf5 h4x

Chest confirms this and gives the following PV (6.8 min):
Qxf6+ Kxf6 Be5+ Kg5 Bg7 Rxd3 cxd3 Kh5 Bf3+ Kg5 h4+ Kf5 g4#

>[D]3B4/7p/6pP/6Pk/1pR4p/3K1b1P/1P3p2/5B2 w - - id 11 WM6; pv Re4 Bd1 Re2 Ba4 Rc2
>Bxc2+ Kd2 Bd3 Kxd3 b3 Be2x

Chest confirms this and gives the following PV (6.79 sec):
Re4 Bd1 Re2 Ba4 Rc2 Bb5+ Rc4 Bc6 Be2+ Bf3 Bxf3#

>[D]8/8/8/8/8/1QKp4/pp2bN2/b1k5 w - - id 12 WM6; pv Qd1+ Bxd1 Nxd3+ Kb1 Kd2 Bg4 Nc5
>Bd1 Ne4 Bg4 Nc3x

Chest gives the following PV (0.19 sec):
Qd1+ Bxd1 Nxd3+ Kb1 Kd2 Ba4 Nf4 Bb3 Ne2 =*= Nc3#

>[D]4k3/8/4K3/8/4N3/4B3/3P1P2/8 w - - id 13 WM6; pv Bc5 Kd8 Nd6 Kc7 Ba7 Kc6 d4 Kc7
>d5 Kd8 Bb6x

Chest confirms this and gives the exact same PV.  3.210 sec


>[D]8/8/2Rp4/B7/5K2/3k4/8/3B4 w - - id 14 WM4; pv Bc3 d5 Kf3 d4 Bb3 dxc3 Rd6x

This one has two solutions (0.10 sec).  The other one is:
 Bb6 Kd2 Be3+ Kd3  Kf3  d5   Bc2#
              Ke1  Bf3  =*=  Rc1#
              Kxd1 Kf3  =*=  Rc1#
     d5  Kf3  Kd2  Be2  =*=  Ba5#
              d4   Be2+ Kd2  Ba5#

>[D]8/4K3/4N3/8/4kP2/1P2n2P/4Q3/8 w - - id 15 WM4; pv Ke8 Kf5 Kf7 Ke4 Ke7 Kf5 Qd3x

Chest confirms this and gives the following PV (0.12 sec):
Ke8 Kd5 Kd7 Ke4 Ke7 Kd5 Qf3#


>Well, how does that look? You'll notice that number 06 only has a 'bm Nd5'.
>That's coz Pretz didn't find the mate within 10 minutes, so I don't know if
>that one is correct! I'm ashamed :( Well let's hit submit :)
>
>Groetjes,
>Paul

Thanks for sharing, Paul!

Heiner



This page took 0 seconds to execute

Last modified: Thu, 15 Apr 21 08:11:13 -0700

Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.