MESON Chess Problem Database

Problem Display
PID: 79125 (K2N2nr/5QPk/8/8/8/8/8/8 w - - 0 1)

Lipton, Michael

The Tablet, 1962

(First published on Sat Sep 29 1962)

K2N2nr/5QPk/8/8/8/8/8/8

#2

4 + 3

5454 Near Snap 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sf6
      • 2.g8S#
    • 1...Sh6
      • 2.g8Q#
      • 2.g8B#
    • 1...Se7
      • 2.g8S#
  • Tries
    • 1.Ka7?
      • 1...Sf6
        • 2.g8S#
      • 1...Sh6
        • 2.g8Q#
        • 2.g8B#
      • 1...Se7
        • 2.g8S#
      • 1...Kh6!
    • 1.Kb7?
      • 1...Sf6
        • 2.g8S#
      • 1...Sh6
        • 2.g8Q#
        • 2.g8B#
      • 1...Se7
        • 2.g8S#
      • 1...Kh6!
    • 1.Kb8?
      • 1...Sf6
        • 2.g8S#
      • 1...Sh6
        • 2.g8Q#
        • 2.g8B#
      • 1...Se7
        • 2.g8S#
      • 1...Kh6!
    • 1.Sc6?
      • 1...Sf6+
        • 2.g8S#
      • 1...Sh6+
        • 2.g8Q#
        • 2.g8B#
      • 1...Se7+
        • 2.g8S#
      • 1...Kh6!
    • 1.Sb7?
      • 1...Sf6+
        • 2.g8S#
      • 1...Sh6+
        • 2.g8Q#
        • 2.g8B#
      • 1...Se7+
        • 2.g8S#
      • 1...Kh6!
    • 1.Qf5+?
      • 1...Kh6
        • 2.gxh8Q#
      • 1...Kxg7!
    • 1.Qf6?
      • threat
        • 2.gxh8Q#
        • 2.gxh8R#
      • 1...Sh6
        • 2.gxh8Q#
        • 2.gxh8R#
      • 1...Se7
        • 2.gxh8Q#
        • 2.gxh8R#
      • 1...Sxf6!
    • 1.gxh8S+?
      • 1...Kh6
        • 2.Qg6#
      • 1...Kxh8!
  • Keys
    • 1.Se6!
      • 1...Sf6+
        • 2.g8S#
      • 1...Sh6+
        • 2.g8Q#
        • 2.g8B#
      • 1...Se7+
        • 2.g8S#
      • 1...Kh6
        • 2.gxh8Q#
        • 2.gxh8R#

Anticipated by 6324(1928)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(b);OGATE,P_PINS(D)::P=S
    • S(b);OGATE,P_PINS(D),SBLOCK::P=Q
  • Tries
    • Try
      • K(C);P-FLIGHT
      • Vars
        • S(b);OGATE::P=S
        • S(b);OGATE,SBLOCK::P=Q
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • K(C);S_FLIGHT
      • Vars
        • S(b);OGATE::P=S
        • S(b);OGATE,SBLOCK::P=Q
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • K(C);P-FLIGHT
      • Vars
        • S(b);OGATE,P_PINS(D)::P=S
        • S(b);OGATE,P_PINS(D),SBLOCK::P=Q
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(D);
      • Vars
        • S(b);CHECK,OGATE::P=S
        • S(b);CHECK,OGATE,SBLOCK::P=Q
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(D);
      • Vars
        • S(b);CHECK,OGATE::P=S
        • S(b);CHECK,OGATE,SBLOCK::P=Q
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::PXR(c)=Q
      • Refutation
        • K(a);P-FLIGHT,XP(B)
    • Try
      • Q(A);
      • Threat
        • PXR(c)=Q
      • Vars
        • S(b);P_PINS(D)::PXR(c)=Q
      • Refutation
        • S(b);P_PINS(D),XQ(A)
    • Try
      • P(B);CHECK,XR(c)
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT,XS(B)
  • Actual
    • S(D);
    • Vars
      • S(b);CHECK,OGATE::P=S
      • S(b);CHECK,OGATE,SBLOCK::P=Q
      • K(a);P-FLIGHT::PXR(c)=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).