MESON Chess Problem Database

Problem Display
PID: 138821 (B7/7K/2R5/8/8/5Q1p/6n1/7k w - - 0 1)

Lincoln, Robert A

StrateGems, 2010

B7/7K/2R5/8/8/5Q1p/6n1/7k

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...h2
      • 2.Rc1#
      • 2.Qf1#
  • Tries
    • 1.Rh6?
      • threat
        • 2.Qxg2#
      • 1...Kh2
        • 2.Qxg2#
      • 1...Kg1!
    • 1.Qf2?
      • 1...Se1
        • 2.Rc1#
      • 1...Se3
        • 2.Rc1#
      • 1...Sf4
        • 2.Rc1#
      • 1...Sh4
        • 2.Rc1#
      • 1...h2
        • 2.Rc1#
        • 2.Qf1#
      • 1...Kh2!
  • Keys
    • 1.Qg3!
      • threat
        • 2.Rc1#
      • 1...Kg1
        • 2.Rc1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(B);P_PINP(c)
      • Threat
        • QAB1(A),XS(b)
      • Vars
        • K(a);N_SPINS(b),P-FLIGHT::QAR1(A),XS(b)
      • Refutation
        • K(a);N_SPINP(c),N_SPINS(b),P-FLIGHT
    • Try
      • Q(A);N_PINS(b)
      • Vars
        • S(b);::B(D)+R(B)
        • S(b);::B(D)+R(B),DCHECK
      • Refutation
        • K(a);P-FLIGHT,P_SPINS(b)
  • Actual
    • Q(A);N_PINS(b)
    • Threat
      • R(B)
    • Vars
      • K(a);P-FLIGHT,P_SPINS(b)::R(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).