MESON Chess Problem Database

Problem Display
PID: 56713 (b1Q5/1r6/kP6/1N6/1K6/8/8/8 w - - 0 1)

Lewis, Robert Tony

The Problemist, 2005

b1Q5/1r6/kP6/1N6/1K6/8/8/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Kxb6
      • 2.Qe6#
  • Tries
    • 1.Qc7?
      • 1...Rxb6
        • 2.Qa7#
      • 1...Ra7
        • 2.Qxa7#
      • 1...Rb8
        • 2.Qa7#
      • 1...Rxc7!
    • 1.Qxa8+?
      • 1...Ra7
        • 2.Qxa7#
      • 1...Kxb6!
  • Keys
    • 1.Qc6!
      • 1...Rxb6
        • 2.Qxa8#
      • 1...Ra7
        • 2.b7#
      • 1...Rc7
        • 2.Sxc7#
      • 1...Rd7
        • 2.b7#
      • 1...Re7
        • 2.b7#
      • 1...Rf7
        • 2.b7#
      • 1...Rg7
        • 2.b7#
      • 1...Rh7
        • 2.b7#
      • 1...Rb8
        • 2.Sc7#
        • 2.b7#

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 1
  • Sets
    • K(a);N_SPINR(b),OGATEB,P-FLIGHT,XP(C)::QAR(D)
  • Tries
    • Try
      • Q(D);N_PINR(b)
      • Vars
        • R(b);OGATE,P_PINS(B),XP(C)::QAR1(D)
        • R(b);OGATE::QAR1(D),XR(b)
        • R(b);OGATE::QAR1(D)
      • Refutation
        • R(b);XQ(D)
    • Try
      • Q(D);CHECK,N_PINR(b),XB(c)
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::QAR1(D),XR(b)
      • Refutation
        • K(a);P-FLIGHT,XP(C)
  • Actual
    • Q(D);N_PINR(b)
    • Vars
      • R(b);OGATE,P_PINS(B),P_SPINR(b),SBLOCK,XP(C)::QAR2(D),XB(c)
      • R(b);OGATE::QAR(D)+P(C)
      • R(b);N_GUARD::S(B),XR(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).