MESON Chess Problem Database

Problem Display
PID: 52381 (4R2K/nn1kPPR1/1P1pq1p1/3P4/6p1/8/8/8 w - - 0 1)

Howard, Kenneth Samuel

Skakbladet, 1934

4R2K/nn1kPPR1/1P1pq1p1/3P4/6p1/8/8/8

#2

7 + 7

5089 The Enjoyment of Chess Problems 1943
5064 100 Years of the American Two-move Chess Problem 1962
5063 Spectacular Chess Problems 1965

SOLUTION

  • SOUND
  • Sets
    • 1...Sd8
      • 2.exd8Q#
      • 2.exd8R#
  • Tries
    • 1.Ra8?
      • threat
        • 2.f8S#
      • 1...Kxe7
        • 2.f8Q#
      • 1...Qxd5
        • 2.e8Q#
      • 1...Qxf7
        • 2.e8Q#
      • 1...Qf5
        • 2.e8Q#
      • 1...Qf6
        • 2.e8Q#
      • 1...Sd8
        • 2.exd8Q#
      • 1...Sc8!
    • 1.Rd8+?
      • 1...Kxe7
        • 2.f8Q#
      • 1...Sxd8!
  • Keys
    • 1.Rb8!
      • threat
        • 2.f8S#
      • 1...Kxe7
        • 2.f8Q#
      • 1...Qxd5
        • 2.e8Q#
      • 1...Qxf7
        • 2.e8Q#
      • 1...Qf5
        • 2.e8Q#
      • 1...Qf6
        • 2.e8Q#
      • 1...Sc8
        • 2.Rxb7#
      • 1...Sd8
        • 2.exd8Q#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • S(f);OGATE::PXS(f)=Q
  • Tries
    • Try
      • R(F);
      • Threat
        • P=S
      • Vars
        • K(g);P-FLIGHT,XP(C)::P=Q
        • Q(c);N_GUARD,XP(A)::P=Q
        • Q(c);N_GUARD,XP(D)::P=Q
        • Q(c);N_GUARD::P=Q
        • Q(c);N_GUARD,P_PINR(E)::P=Q
        • S(f);OGATE::PXS(f)=Q
      • Refutation
        • S(e);
    • Try
      • R(F);CHECK
      • Vars
        • K(g);P-FLIGHT,XP(C)::P=Q
      • Refutation
        • S(f);XR(F)
  • Actual
    • R(F);
    • Threat
      • P=S
    • Vars
      • K(g);P-FLIGHT,XP(C)::P=Q
      • Q(c);N_GUARD,XP(A)::P=Q
      • Q(c);N_GUARD,XP(D)::P=Q
      • Q(c);N_GUARD::P=Q
      • Q(c);N_GUARD,P_PINR(E)::P=Q
      • S(e);SBLOCK::R(F),XS(f)
      • S(f);OGATE::PXS(f)=Q
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).