MESON Chess Problem Database

Problem Display
PID: 204340 (1qB5/PP6/k1NN4/8/8/8/8/4K3 w - - 0 1)

Giobel, Bengt Rudolf

Tidskrift for Schack, 1925

1qB5/PP6/k1NN4/8/8/8/8/4K3

#2

6 + 2

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd6
      • 2.b8Q#
      • 2.b8R#
    • 1...Qa8
      • 2.bxa8S#
  • Tries
    • 1.a8Q+?
      • 1...Qa7
        • 2.Qxa7#
        • 2.b8Q#
        • 2.b8R#
      • 1...Qxa8
        • 2.bxa8S#
      • 1...Kb6!
    • 1.a8R+?
      • 1...Qa7
        • 2.b8Q#
        • 2.b8R#
      • 1...Qxa8
        • 2.bxa8S#
      • 1...Kb6!
  • Keys
    • 1.a8S!
      • 1...Qxd6
        • 2.b8Q#
        • 2.b8R#
      • 1...Qxb7
        • 2.Bxb7#
      • 1...Qxa8
        • 2.bxa8S#
      • 1...Qxc8
        • 2.bxc8Q#
        • 2.bxc8B#
      • 1...Qa7
        • 2.b8S#
      • 1...Qc7
        • 2.b8S#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(b);OGATE,XS(C)::P=Q
    • Q(b);OGATE::PXQ(b)=S
  • Tries
    • Try
      • P(D);CHECK
      • Vars
        • Q(b);OGATE,XQ(D)::PXQ(b)=S
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • P(D);CHECK
      • Vars
        • Q(b);OGATE,P_SPINQ(b)::P=Q
        • Q(b);OGATE,XR(D)::PXQ(b)=S
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • P(D);
    • Vars
      • Q(b);OGATE,XS(C)::P=Q
      • Q(b);OGATE,P_SPINQ(b),XP(E)::B(F),XQ(b)
      • Q(b);OGATE,XS(D)::PXQ(b)=S
      • Q(b);OGATE,XB(F)::PXQ(b)=Q
      • Q(b);OGATE::P=S
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).