MESON Chess Problem Database

Problem Display
PID: 234459 (8/7p/5B2/6Pk/4K3/8/1Q4R1/8 w - - 0 1)

Lincoln, Robert A

ChessStar, 2013

8/7p/5B2/6Pk/4K3/8/1Q4R1/8

#2

5 + 2

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Rh2+?
      • 1...Kg4
        • 2.Qg2#
      • 1...Kg6!
    • 1.Qe2+?
      • 1...Kh4
        • 2.Qg4#
      • 1...Kg6!
    • 1.Qb5?
      • 1...Kg6
        • 2.Qe8#
      • 1...h6
        • 2.g6#
      • 1...Kh4!
    • 1.Qb8?
      • 1...Kh4
        • 2.Qh2#
      • 1...Kg6
        • 2.Qe8#
      • 1...h6!
  • Keys
    • 1.Qe5!
      • 1...Kh4
        • 2.Qh2#
      • 1...Kg6
        • 2.Qe8#
      • 1...h6
        • 2.g6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR2(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::QAB(A)
        • P(b);SBLOCK::QAR(A)+P(D)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
        • K(a);S_FLIGHT::QAB(A)
      • Refutation
        • P(b);
  • Actual
    • Q(A);
    • Vars
      • K(a);P-FLIGHT::QAR2(A)
      • K(a);S_FLIGHT::QAB(A)
      • P(b);SBLOCK::QAR(A)+P(D)
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).