MESON Chess Problem Database

Problem Display
PID: 249386 (7B/5kP1/6N1/7B/7K/Q7/8/8 w - - 0 1)

Speckmann, Werner

Deutsche Schachzeitung, 1972

7B/5kP1/6N1/7B/7K/Q7/8/8

#2

6 + 1

5454 Near Snap 2021
6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ke8
      • 2.Qe7#
  • Tries
    • 1.Se7+?
      • 1...Kf6
        • 2.Qd6#
        • 2.g8Q#
        • 2.g8B#
      • 1...Ke6!
    • 1.Sf8+?
      • 1...Kg8
        • 2.Qa2#
        • 2.Qb3#
      • 1...Kf6!
    • 1.Qd6?
      • threat
        • 2.Se7#
      • 1...Ke8
        • 2.Sf4#
        • 2.Se5#
        • 2.Se7#
        • 2.Sf8#
        • 2.Qe7#
        • 2.g8Q#
      • 1...Kg8!
    • 1.Qh3?
      • 1...Kf6
        • 2.g8Q#
        • 2.g8B#
      • 1...Ke8
        • 2.g8Q#
      • 1...Kg8!
    • 1.g8B+?
      • 1...Ke8
        • 2.Qe7#
      • 1...Kxg8!
  • Keys
    • 1.Qd3!
      • 1...Ke6
        • 2.g8Q#
        • 2.g8B#
      • 1...Kf6
        • 2.g8Q#
        • 2.g8B#
      • 1...Ke8
        • 2.g8Q#
      • 1...Kg8
        • 2.Se7#

Anticipated by 85762(1971), 178328(1971)

This is a version

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAR1(A)
  • Tries
    • Try
      • S(D);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(D);CHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • B(C)+S(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::P=Q
        • K(a);S_FLIGHT::P=Q
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • P(E);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT,XB(E)
  • Actual
    • Q(A);
    • Vars
      • K(a);S_FLIGHT::P=Q
      • K(a);P-FLIGHT::P=Q
      • K(a);S_FLIGHT::S(D)
HTML5 logo

Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).