[Retros] Re : Retros Digest, Vol 23, Issue 7

Paul R quarpaz1 at yahoo.fr
Sun Nov 12 14:12:32 EST 2006

Hello,
Here is a double-pin mate after A. Frolkin:
1. Pf2-f3 Pe7-e5 2. Ke1-f2 Pe5-e4 3. Pf3xe4 Qd8-g5
4. Ng1-f3 Qg5xd2 5. Nf3-e1 Qd2xc2 6. Qd1-d4 Pd7-d5
7. Qd4xa7 Nb8-d7 8. Qa7-b8 Ra8xa2 9. Bc1-e3 Ra2-a3
10. Be3-a7 Ra3-g3 11. Ph2xg3 Pd5-d4 12. Rh1-h6 Bf8-c5
13. Rh6-b6 Ph7-h5 14. Ra1-a3 Rh8-h6 15. Ra3-f3 Rh6-f6
16. Nb1-c3 Pd4-d3# C+ (Euclide)

Result:
Unique solution 0.61 seconds
P.Raican

----- Message d'origine ----
De : "retros-request at janko.at" <retros-request at janko.at>
À : retros at janko.at
Envoyé le : Dimanche, 12 Novembre 2006, 19h00mn 43s
Objet : Retros Digest, Vol 23, Issue 7

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Today's Topics:

1. Pawn to-the-6th rank mates (Hirokaz ONODA)
2. King mated on the 7th/8th rank (Hirokaz ONODA)
3. Re: King mated on the 7th/8th rank (Francois Labelle)
4. Re: Double-pin mate (Nicolas.Dupont at math.univ-lille1.fr)
5. Re: Double-pin mate (afretro)
6. King mated on the 7th/8th rank (Hirokaz ONODA)
7. Re: King mated on the 7th/8th rank (Joost de Heer)


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Message: 1
Date: Sun, 12 Nov 2006 05:13:03 +0900 (JST)
From: Hirokaz ONODA <glkoon at yahoo.co.jp>
Subject: [Retros] Pawn to-the-6th rank mates
To: The Retrograde Analysis Mailing List <retros at janko.at>
Message-ID: <20061111201303.71686.qmail at web3601.mail.tnz.yahoo.co.jp>
Content-Type: text/plain; charset=iso-2022-jp


> 1.Pf2-f4 Pd7-d5 2.Pf4-f5 Pd5-d4 3.Pf5-f6

Fc8-g4

> 4.Pf6xe7 Fg4xe2 5.Pe7xd8=F Ff8-c5 6.Fd8-h4

Fc5-b6

> 7.Fh4-g3 Re8-e7 8.Re1-f2 Re7-f6 9.Dd1-e1

Pd4-d3

Hi,

Category II:
b6#/...b3# etc., discovered checkmate

A shorter game:
1.Pb2-b3 Pd7-d5 2.Fc1-a3 Pd5-d4 3.Fa3xe7 Dd8xe7
4.Pe2-e4 De7xe4 5.Cg1-e2 Ff8-c5 6.Pf2-f3 Cg8-e7
7.Re1-f2 0-0 8.Ce2-g3 Pd4-d3

Hiro


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Message: 2
Date: Sun, 12 Nov 2006 06:00:00 +0900 (JST)
From: Hirokaz ONODA <glkoon at yahoo.co.jp>
Subject: [Retros] King mated on the 7th/8th rank
To: The Retrograde Analysis Mailing List <retros at janko.at>
Message-ID: <20061111210000.75916.qmail at web3601.mail.tnz.yahoo.co.jp>
Content-Type: text/plain; charset=iso-2022-jp

Hello,

[White's King on e8]
1.Pf2-f4 Ph7-h5 2.Re1-f2 Th8-h6 3.Rf2-g3 Th6-f6
4.Rg3-h4 Tf6xf4 5.Rh4-g5 Pf7-f5 6.Rg5-g6 Pe7-e6
7.Rg6-h7 Dd8-g5 8.Rh7-h8 Re8-e7 9.Rh8xg8 Re7-f6
10.Rg8xf8 Dg5-h6 11.Rf8-e8 Dh6-h8

[White's King on g8]
1.Pf2-f4 Ph7-h5 2.Re1-f2 Th8-h6 3.Rf2-g3 Th6-f6
4.Rg3-h4 Tf6xf4 5.Rh4-g5 Pf7-f5 6.Rg5-g6 Pe7-e5
7.Rg6-h7 Re8-f7 8.Rh7-h8 Rf7-g6 9.Rh8xg8 Ff8-d6

Any other games?

Amici Sumus,
Hiro


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Message: 3
Date: Sat, 11 Nov 2006 14:55:27 -0800 (PST)
From: Francois Labelle <flab at EECS.Berkeley.EDU>
Subject: Re: [Retros] King mated on the 7th/8th rank
To: The Retrograde Analysis Mailing List <retros at janko.at>
Message-ID:
<Pine.GSO.4.61.0611111448240.29221 at argus.EECS.Berkeley.EDU>
Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed

[White's King on f7]
1. d4 c5 2. Qd3 Qb6 3. Qxh7 Qxb2 4. Qxg8 Qxa2 5. Qxg7 Qxb1 6. Rxa7 Rxh2 7.
Rxa8 Rxg2 8. Rxb8 Rxf2 9. Kxf2 Qxc2 10. Ke3 cxd4+ 11. Kxd4 Qxe2 12. Rxb7
Qxf1 13. Rxd7 e5+ 14. Kxe5 Qxg1 15. Kf6 Kxd7 16. Kxf7 Qxg7#

It can probably be done with fewer captures ;)

Francois


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Message: 4
Date: Sun, 12 Nov 2006 08:23:24 +0100 (CET)
From: Nicolas.Dupont at math.univ-lille1.fr
Subject: Re: [Retros] Double-pin mate
To: afretro at yandex.ru, "The Retrograde Analysis Mailing List"
<retros at janko.at>
Message-ID:
<4327.195.146.250.173.1163316204.squirrel at mathwebmail.univ-lille1.fr>
Content-Type: text/plain;charset=utf-8

Andrey asked :


> How many pins can be effective in the mate position of an SPG (regardless

> of the mating piece)? Three? Four? Or even more?


It's not so complicated to get four...

1.Pa2-a4 Ph7-h5 2.Pa4-a5 Ph5-h4 3.Pa5-a6 Ph4-h3
4.Pa6xb7 Ph3xg2 5.Ph2-h4 Pa7-a5 6.Ph4-h5 Pa5-a4
7.Ph5-h6 Pa4-a3 8.Ph6-h7 Pa3-a2 9.Th1-h6 Pa2xb1=T
10.Cg1-h3 Pg2-g1=T 11.Ta1-a3 Tg1-g5 12.Ta3-g3 Ta8-a1
13.Ph7xg8=T Cb8-a6 14.Pb7-b8=T Fc8-b7 15.Tb8-c8 Fb7-h1
16.Pe2-e4 Pc7-c5 17.Ff1-b5 Pc5-c4 18.Dd1-h5 Tg5-c5
19.Pf2-f3 Pe7-e5 20.Th6-e6

Obtaining five effective pins needs of course a completely different kind
of strategy (the thematic king must probably stand around the center of
the board). It should probably exists, although I have strictly no idea of
how getting it.

Other researches can be made on that 4-pins task. For examples :
- fewer moves
- no visible promoted piece
- AUW-like




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Message: 5
Date: Sun, 12 Nov 2006 10:41:28 +0300 (MSK)
From: "afretro" <afretro at yandex.ru>
Subject: Re: [Retros] Double-pin mate
To: Nicolas.Dupont at math.univ-lille1.fr
Cc: retros at janko.at
Message-ID: <4556D028.000001.02789 at webmail10.yandex.ru>
Content-Type: text/plain; charset="KOI8-R"

Dear Nicolas,
Thanks for taking note of my idea! Your four-pin mate SPG looks very impressive!
Best,
Andrey


>Andrey asked :

>

>> How many pins can be effective in the mate position of an SPG (regardless

>> of the mating piece)? Three? Four? Or even more?

>

>It's not so complicated to get four...

>

>1.Pa2-a4 Ph7-h5 2.Pa4-a5 Ph5-h4 3.Pa5-a6 Ph4-h3

>4.Pa6xb7 Ph3xg2 5.Ph2-h4 Pa7-a5 6.Ph4-h5 Pa5-a4

>7.Ph5-h6 Pa4-a3 8.Ph6-h7 Pa3-a2 9.Th1-h6 Pa2xb1=T

>10.Cg1-h3 Pg2-g1=T 11.Ta1-a3 Tg1-g5 12.Ta3-g3 Ta8-a1

>13.Ph7xg8=T Cb8-a6 14.Pb7-b8=T Fc8-b7 15.Tb8-c8 Fb7-h1

>16.Pe2-e4 Pc7-c5 17.Ff1-b5 Pc5-c4 18.Dd1-h5 Tg5-c5

>19.Pf2-f3 Pe7-e5 20.Th6-e6

>

>Obtaining five effective pins needs of course a completely different kind

>of strategy (the thematic king must probably stand around the center of

>the board). It should probably exists, although I have strictly no idea of

>how getting it.

>

>Other researches can be made on that 4-pins task. For examples :

>- fewer moves

>- no visible promoted piece

>- AUW-like

>

>



--
??????? ??????? ????, ????? ??????? ????? ?? ??????? http://mail.yandex.ru


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Message: 6
Date: Sun, 12 Nov 2006 21:31:43 +0900 (JST)
From: Hirokaz ONODA <glkoon at yahoo.co.jp>
Subject: [Retros] King mated on the 7th/8th rank
To: The Retrograde Analysis Mailing List <retros at janko.at>
Message-ID: <20061112123143.38359.qmail at web3603.mail.tnz.yahoo.co.jp>
Content-Type: text/plain; charset=iso-2022-jp

Hi,

2 more games.

[White's King on a8]
1.Pd2-d3 Pb7-b5 2.Re1-d2 Fc8-b7 3.Rd2-c3 Fb7-f3
4.Rc3-b4 Ff3xe2 5.Rb4-a5 Cb8-c6 6.Ra5-a6 Cc6-b8
7.Ra6-b7 Dd8-c8 8.Rb7xa8 Cb8-c6

[White's King on b7]
1.Pd2-d3 Pb7-b5 2.Re1-d2 Fc8-b7 3.Rd2-c3 Fb7-f3
4.Rc3-b4 Ff3xe2 5.Rb4-a5 Cb8-c6 6.Ra5-a6 Cc6-b4
7.Ra6-b7 Dd8-b8

Hiro


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Message: 7
Date: Sun, 12 Nov 2006 15:26:22 +0100
From: Joost de Heer <joost at sanguis.xs4all.nl>
Subject: Re: [Retros] King mated on the 7th/8th rank
To: The Retrograde Analysis Mailing List <retros at janko.at>
Message-ID: <45572F0E.1050004 at sanguis.xs4all.nl>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Hirokaz ONODA schreef:

> Hi,

>

> 2 more games.


See also Andrei Kislyak's book 'Poverzhenny monarkh (The monarch
overturned)'. It's '[a b]ooklet containing 64 SPG's in which the Black
King is mated on every square of the board, the mate being a pure mate.'


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