MESON Chess Problem Database

Problem Display
PID: 46110 (2Q5/3R4/K2b2B1/3N4/p1PkPp2/P4p2/5R2/2N3B1 w - - 0 1)

Lyness, Robert Cranston

2nd HM., The Observer, 1960

(First published on Sun Apr 24 1960)

2Q5/3R4/K2b2B1/3N4/p1PkPp2/P4p2/5R2/2N3B1

#2

11 + 5

56 The Problemist 2002
17397 Ling Notebooks 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Be5
      • 2.Rd2#
      • 2.Rxf3#
  • Tries
    • 1.Sb4?
      • 1...Kc3
        • 2.Rc2#
      • 1...Ke3
        • 2.Sc2#
        • 2.Re2#
      • 1...Ke5!
  • Keys
    • 1.Sc7!
      • 1...Kc3
        • 2.Sb5#
      • 1...Ke3
        • 2.Re2#
      • 1...Kxc4
        • 2.Rc2#
      • 1...Kc5
        • 2.Se6#
      • 1...Ke5
        • 2.Qh8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(G);P_PINB(e)
      • Vars
        • K(c);N_SPINB(e),S_FLIGHT::R1(C)
      • Refutation
        • K(c);N_SPINB(e),S_FLIGHT
  • Actual
    • S(G);P_PINB(e)
    • Vars
      • K(c);N_SPINB(e),S_FLIGHT::S(G)
      • K(c);N_SPINB(e),S_FLIGHT::B(B)+R(C),DCHECK
      • K(c);N_SPINB(e),P-FLIGHT,XP(E)::R(C)
      • K(c);N_SPINB(e),S_FLIGHT::QAR(K)+S(G),DCHECK
      • K(c);N_SPINB(e),S_FLIGHT::QAB(K)
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).