MESON Chess Problem Database

Problem Display
PID: 10500 (1n2k3/4P2r/4Q3/1K2N3/8/8/8/8 w - - 0 1)

Speckmann, Werner

Die Schwalbe, 1965

1n2k3/4P2r/4Q3/1K2N3/8/8/8/8

#2

4 + 3

3295 Einfuhrung in die Welt des Schachproblem 1984
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rh1
      • 2.Qf7#
    • 1...Rh2
      • 2.Qf7#
    • 1...Rh3
      • 2.Qf7#
    • 1...Rh4
      • 2.Qf7#
    • 1...Rh5
      • 2.Qf7#
    • 1...Rh6
      • 2.Qf7#
    • 1...Rxe7
      • 2.Qc8#
      • 2.Qg8#
    • 1...Rf7
      • 2.Qxf7#
    • 1...Rh8
      • 2.Qf7#
    • 1...Sa6
      • 2.Qd7#
    • 1...Sc6
      • 2.Qd7#
    • 1...Sd7
      • 2.Qxd7#
  • Tries
    • 1.Qd5?
      • threat
        • 2.Qd8#
      • 1...Rxe7
        • 2.Qg8#
      • 1...Sc6
        • 2.Qd7#
      • 1...Sd7
        • 2.Qxd7#
      • 1...Kxe7!
    • 1.Qf5?
      • threat
        • 2.Qf8#
      • 1...Rxe7
        • 2.Qc8#
      • 1...Rf7
        • 2.Qxf7#
      • 1...Rh8
        • 2.Qf7#
      • 1...Sd7
        • 2.Qxd7#
      • 1...Kxe7!
    • 1.Qf6?
      • threat
        • 2.Qf8#
      • 1...Rxe7
        • 2.Qh8#
      • 1...Rf7
        • 2.Qxf7#
      • 1...Rh8
        • 2.Qf7#
      • 1...Sd7!
    • 1.Qg6+?
      • 1...Rf7
        • 2.Qxf7#
      • 1...Kxe7!
  • Keys
    • 1.Qd6!
      • threat
        • 2.Qd8#
      • 1...Rxe7
        • 2.Qxb8#
      • 1...Sc6
        • 2.Qd7#
      • 1...Sd7
        • 2.Qxd7#

This anticipates 232378(1979)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 9
  • Sets
    • R(a);N_GUARD::QAB1(C)
    • R(a);N_GUARD,P_PINS(B)::QAB1(C)
    • R(a);N_GUARD::QAB1(C),XR(a)
    • S(b);N_GUARD::QAB1(C)
    • S(b);N_GUARD::QAB1(C),XS(b)
  • Tries
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • R(a);SBLOCK,XP(D)::QAR2(C)
        • S(b);N_GUARD::QAB1(C)
        • S(b);N_GUARD::QAB1(C),XS(b)
      • Refutation
        • K(c);P-FLIGHT,XP(D)
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • R(a);SBLOCK,XP(D)::QAR2(C)
        • R(a);N_GUARD::QAB1(C),XR(a)
        • R(a);N_GUARD::QAB1(C)
        • S(b);N_GUARD::QAB1(C),XS(b)
      • Refutation
        • K(c);P-FLIGHT,XP(D)
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • R(a);N_GUARD,SBLOCK,XP(D)::QAR(C)
        • R(a);N_GUARD::QAB1(C),XR(a)
        • R(a);N_GUARD::QAB1(C)
      • Refutation
        • S(b);
    • Try
      • Q(C);CHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::QAB1(C),XR(a)
      • Refutation
        • K(c);P-FLIGHT,XP(D)
  • Actual
    • Q(C);
    • Threat
      • QAR1(C)
    • Vars
      • R(a);SBLOCK,XP(D)::QAR(C),XS(b)
      • S(b);N_GUARD::QAB1(C)
      • S(b);N_GUARD::QAB1(C),XS(b)
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).