[Retros] BREAKING NEWS: New Proof Games Length Record

Sat Feb 11 10:26:22 EST 2017

63.5 version cooked. Here is a new:
+---+---+---+---+---+---+---+---+
|*K | . | Q | . | N | B |*R | . |
+---+---+---+---+---+---+---+---+
|*Q |   | . |   | . |*R |*R |   |
+---+---+---+---+---+---+---+---+
|   | R |*Q | . |   | . |   | . |
+---+---+---+---+---+---+---+---+
| . |   | R |*B | . |   | . |*R |
+---+---+---+---+---+---+---+---+
| R | N | R |*B |*R | . |   | . |
+---+---+---+---+---+---+---+---+
| . |   | R | B | R |*R | . |   |
+---+---+---+---+---+---+---+---+
| R |*N |   | . |*R | R |   | . |
+---+---+---+---+---+---+---+---+
| . |   | . |   | . | K |*N |   |
+---+---+---+---+---+---+---+---+
k1Q1NBr1/q4rr1/1Rq5/2Rb3r/RNRbr3/2RBRr2/Rn2rR2/5Kn1
SPG 63.5
.. 63.Ne8 Qa7 64.Qc8+

From: Retros [mailto:retros-bounces at janko.at] On Behalf Of Göran Wicklund
Sent: den 11 februari 2017 16:21
To: The Retrograde Analysis Mailing List
Subject: Re: [Retros] BREAKING NEWS: New Proof Games Length Record

62.5, 63.0 and 63.5

In the original 57.5 game, rook b4 moves to c4, as in all my tries.
In the new 58.5 game, instead rook c3 moves to c4. I do not see the
reason for this change, but I suspect that it is to avoid a cook.
In that case, my tries are all cooked...

/Göran

+---+---+---+---+---+---+---+---+
|*K | Q |   | . |   | B |*R | . |
+---+---+---+---+---+---+---+---+
| . |   | . |   | . |*R |*R |   |
+---+---+---+---+---+---+---+---+
|   | R |*Q | N |   | . |   | . |
+---+---+---+---+---+---+---+---+
|*Q |   | R |*B | . |   | . |*R |
+---+---+---+---+---+---+---+---+
| R | N | R |*B |*R | . |   | . |
+---+---+---+---+---+---+---+---+
| . |   | R | B | R |*R | . |   |
+---+---+---+---+---+---+---+---+
| R |*N |   | . |*R | R |   | . |
+---+---+---+---+---+---+---+---+
| . |   | . |   | . | K |*N |   |
+---+---+---+---+---+---+---+---+
kQ3Br1/5rr1/1RqN4/q1Rb3r/RNRbr3/2RBRr2/Rn2rR2/5Kn1
SPG 62.5
... 52.R1f2 Rce4 53.Kf1 Bd4 54.Rfc5 Ne5 55.Rhb6 Nd6 56.Nf5 Ndc4
57.Nd6 Nb2 58.Rbc4 Nf3 59.Nb4 Ng1 60.Ra2 Ref3 61.Re3 Bd5 62.Bd3 Qc6 63.Qb8#

+---+---+---+---+---+---+---+---+
|*K | . |   | . | N | B |*R | . |
+---+---+---+---+---+---+---+---+
| . |   | Q |   | . |*R |*R |   |
+---+---+---+---+---+---+---+---+
|   | R |*Q | . |   | . |   | . |
+---+---+---+---+---+---+---+---+
|*Q |   | R |*B | . |   | . |*R |
+---+---+---+---+---+---+---+---+
| R | N | R |*B |*R | . |   | . |
+---+---+---+---+---+---+---+---+
| . |   | R | B | R |*R | . |   |
+---+---+---+---+---+---+---+---+
| R |*N |   | . |   | R |   | . |
+---+---+---+---+---+---+---+---+
| . |   | . |   |*R | K |*N |   |
+---+---+---+---+---+---+---+---+
k3NBr1/2Q2rr1/1Rq5/q1Rb3r/RNRbr3/2RBRr2/Rn3R2/4rKn1
SPG 63.0
.. 53.Kf1 Bd4 54.Rfc5 Ne5 55.Rhb6 Nd6 56.Nf5 Ndc4 57.Nd6 Nb2
58.Rbc4 Nf3 59.Nb4 Ng1 60.Ra2 Ref3 61.Re3 Bd5 62.Bd3 Qc6 63.Ne8 Re1+
16.5 moves verified by Popeye.

+---+---+---+---+---+---+---+---+
|*K | Q |   | . | N | B |*R | . |
+---+---+---+---+---+---+---+---+
|*Q |   | . |   | . |*R |*R |   |
+---+---+---+---+---+---+---+---+
|   | R |*Q | . |   | . |   | . |
+---+---+---+---+---+---+---+---+
| . |   | R |*B | . |   | . |*R |
+---+---+---+---+---+---+---+---+
| R | N | R |*B |*R | . |   | . |
+---+---+---+---+---+---+---+---+
| . |   | R | B | R |*R | . |   |
+---+---+---+---+---+---+---+---+
| R |*N |   | . |*R | R |   | . |
+---+---+---+---+---+---+---+---+
| . |   | . |   | . | K |*N |   |
+---+---+---+---+---+---+---+---+
kQ2NBr1/q4rr1/1Rq5/2Rb3r/RNRbr3/2RBRr2/Rn2rR2/5Kn1
SPG 63.5
.. 60.Ra2 Ref3 61.Re3 Bd5 62.Bd3 Qc6 63.Ne8 Qa7 64.Qb8#
Last 17 moves verified by Popoeye

From: Retros [mailto:retros-bounces at janko.at] On Behalf Of Göran Wicklund
Sent: den 11 februari 2017 12:04
To: The Retrograde Analysis Mailing List
Subject: Re: [Retros] BREAKING NEWS: New Proof Games Length Record

62.0

+---+---+---+---+---+---+---+---+
|*K | . |   | . |*Q | B |*R | . |
+---+---+---+---+---+---+---+---+
|*Q |*B | Q |   | . |*R |*R |   |
+---+---+---+---+---+---+---+---+
|   | R |   | N |   | . |   | . |
+---+---+---+---+---+---+---+---+
| . |   | R |   | . |   | . |*R |
+---+---+---+---+---+---+---+---+
| R | N | R |*B |*R | . |   | . |
+---+---+---+---+---+---+---+---+
| . |   | R | B | R |*R | . |   |
+---+---+---+---+---+---+---+---+
| R |*N |   | . |   | R |   | . |
+---+---+---+---+---+---+---+---+
| . |   | . |   |*R | K |*N |   |
+---+---+---+---+---+---+---+---+
k3qBr1/qbQ2rr1/1R1N4/2R4r/RNRbr3/2RBRr2/Rn3R2/4rKn1
SPG 62.0

Last moves:
.. 55.Rhb6 Nd6 56.Nf5 Ndc4 57.Nd6 Nb2 58.Rbc4 Nf3 59.Nb4 Ng1 60.Ra2 Ref3 61.Re3 Qa7 62.Bd3 Re1+
15.5 last moves verified by Popeye.
White bishop c3 makes a switchback which could open up for a cook.

/Göran

From: Retros [mailto:retros-bounces at janko.at] On Behalf Of Göran Wicklund
Sent: den 11 februari 2017 09:45
To: The Retrograde Analysis Mailing List
Subject: Re: [Retros] BREAKING NEWS: New Proof Games Length Record

61.5????

+---+---+---+---+---+---+---+---+
|*K | Q |   | . |*Q | B |   |*R |
+---+---+---+---+---+---+---+---+
| . |*B | . |   | . |*R |*R |   |
+---+---+---+---+---+---+---+---+
|   | R |   | N |   | . |   | . |
+---+---+---+---+---+---+---+---+
|*Q |   | R |   | . |   | . |*R |
+---+---+---+---+---+---+---+---+
| R | N | R |*B |*R | . |   | . |
+---+---+---+---+---+---+---+---+
| . |   | R |   | R |*R | . |   |
+---+---+---+---+---+---+---+---+
| R |*N | B | . |*R | R |   | . |
+---+---+---+---+---+---+---+---+
| . |   | . |   | . | K |*N |   |
+---+---+---+---+---+---+---+---+
kQ2qB1r/1b3rr1/1R1N4/q1R4r/RNRbr3/2R1Rr2/RnB1rR2/5Kn1
SPG 61.5

Last 16 moves, verified by Popeye:
46......Qd6+ Ka8 47.Qc7 Nge7 48.d8=R+ Nc8 49.Rdd3 Rhg8
50.h8=R Rae1 51.Rh6 R1e2 52.R1f2 Rce4 53.Kf1 Bd4 54.Rfc5 Ne5
55.Rhb6 Nd6 56.Nf5 Ndc4 57.Nd6 Nb2 58.Rbc4 Nf3 59.Nb4 Ng1
60.Ra2 Ref3 61.Re3 Rgh8 62.Qb8+

/Göran

From: Retros [mailto:retros-bounces at janko.at] On Behalf Of Göran Wicklund
Sent: den 11 februari 2017 08:42
To: The Retrograde Analysis Mailing List
Subject: Re: [Retros] BREAKING NEWS: New Proof Games Length Record

60.5?

+---+---+---+---+---+---+---+---+
|*K | Q |   | . |*Q | B |*R | . |
+---+---+---+---+---+---+---+---+
| . |*B | . |   | . |*R |*R |   |
+---+---+---+---+---+---+---+---+
|   | R |   | N |   | . |   | . |
+---+---+---+---+---+---+---+---+
|*Q |   | R |   | . |   | . |*R |
+---+---+---+---+---+---+---+---+
| R | N | R |*B |*R | . |   | . |
+---+---+---+---+---+---+---+---+
| . |   | R |   | . |*R | . |   |
+---+---+---+---+---+---+---+---+
| R |*N | B | R |*R | R |   | . |
+---+---+---+---+---+---+---+---+
| . |   | . |   | . | K |*N |   |
+---+---+---+---+---+---+---+---+
kQ2qBr1/1b3rr1/1R1N4/q1R4r/RNRbr3/2R2r2/RnBRrR2/5Kn1
SPG 60.5
.. 58.Rbc4 Nf3 59.Nb4 Ng1 60.Ra2 Ref3 61.Qb8+

/Göran

From: Retros [mailto:retros-bounces at janko.at] On Behalf Of Göran Wicklund
Sent: den 11 februari 2017 08:19
To: The Retrograde Analysis Mailing List
Subject: Re: [Retros] BREAKING NEWS: New Proof Games Length Record
Importance: High

Amazing after all these years!

A try on 59.5:

+---+---+---+---+---+---+---+---+

|*K | Q |   | . |*Q | B |*R | . |

+---+---+---+---+---+---+---+---+

| . |*B | . |   | . |*R |*R |   |

+---+---+---+---+---+---+---+---+

|   | R |   | N |   | . |   | . |

+---+---+---+---+---+---+---+---+

|*Q |   | R |   | . |   | . |*R |

+---+---+---+---+---+---+---+---+

| R | N | R |*B |*R | . |   | . |

+---+---+---+---+---+---+---+---+

| R |   | R |   |*R |   | . |   |

+---+---+---+---+---+---+---+---+

|   |*N | B | R |*R | R |   | . |

+---+---+---+---+---+---+---+---+

| . |   | . |   | . | K |*N |   |

+---+---+---+---+---+---+---+---+

kQ2qBr1/1b3rr1/1R1N4/q1R4r/RNRbr3/R1R1r3/1nBRrR2/5Kn1

SPG 59.5

Last 17 moves,  verified by Popeye:

.42.... Re3 43.d5 Rdd7 44.d6 Rdf7 45.d7+ Kb8 46.Qd6+ Ka8 47.Qc7 Nge7

48.d8=R+ Nc8 49.Rd2 Rhg8 50.h8=R Rae1 51.Rh6 R1e2 52.R1f2 Rce4

53.Kf1 Bd4 54.Rfc5 Ne5 55.Rhb6 Nd6 56.Nf5 Ndc4 57.Nd6 Nb2 58.Rbc4 Nf3

59.Nb4 Ng1 60.Qb8+

..and 60.0:

+---+---+---+---+---+---+---+---+

|*K | . |   | . |*Q | B |*R | . |

+---+---+---+---+---+---+---+---+

| . |*B | Q |   | . |*R |*R |   |

+---+---+---+---+---+---+---+---+

|   | R |   | N |   | . |   | . |

+---+---+---+---+---+---+---+---+

|*Q |   | R |   | . |   | . |*R |

+---+---+---+---+---+---+---+---+

| R | N | R |*B |*R | . |   | . |

+---+---+---+---+---+---+---+---+

| . |   | R |   |*R |   | . |   |

+---+---+---+---+---+---+---+---+

| R |*N | B | R |   | R |   | . |

+---+---+---+---+---+---+---+---+

| . |   | . |   |*R | K |*N |   |

+---+---+---+---+---+---+---+---+

k3qBr1/1bQ2rr1/1R1N4/q1R4r/RNRbr3/2R1r3/RnBR1R2/4rKn1

Last moves:

... 58.Rbc4 Nf3 59.Nb4 Ng1 60.Ra2 Re1#

Best regards,

Göran Wicklund

-----Original Message-----
From: Retros [mailto:retros-bounces at janko.at] On Behalf Of Thomas Brand
Sent: den 10 februari 2017 12:58
To: The Retrograde Analysis Mailing List
Subject: [Retros] BREAKING NEWS: New Proof Games Length Record

Dear all,

Today the February issue of Die Schwalbe appeared -- and it contains a new length record for unique proof games! In hard work Andrey Frolkin and Werner Keym managed to set the new record to 58.5 moves -- based on the scheme of the former record by Pronkin and Frolkin. Congratulation!!

You may find the problem together with some "record history" in my blog:

http://www.thbrand.de/2017/02/10/neuer-laengenrekord/

Have fun, and best regards,

Thomas

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