MESON Chess Problem Database

Problem Display
PID: 210073 (7Q/4N3/8/2nK2k1/6P1/8/7N/8 w - - 0 1)

d'Andrea, G

Land og Folk, 1976

7Q/4N3/8/2nK2k1/6P1/8/7N/8

#2

5 + 2

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Qe5#
  • Tries
    • 1.Sg8?
      • threat
        • 2.Qf6#
        • 2.Qh6#
      • 1...Kf4
        • 2.Qe5#
      • 1...Se4
        • 2.Qh6#
      • 1...Sd7
        • 2.Qh6#
      • 1...Kg6!
    • 1.Qg7+?
      • 1...Kf4
        • 2.Qe5#
      • 1...Kh4!
    • 1.Qh5+?
      • 1...Kf4
        • 2.Qe5#
      • 1...Kf6!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Qh6#
      • 1...Kf4
        • 2.Qh6#
      • 1...Kg6
        • 2.Qg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::QAB1(E)
  • Tries
    • Try
      • S(D);
      • Threat
        • DUALS(2)
      • Vars
        • K(b);S_FLIGHT::QAB1(E)
        • S(a);::QAB1(E)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB1(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAB1(E)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • S(D);
    • Threat
      • QAB1(E)
    • Vars
      • K(b);S_FLIGHT::QAB(E)
      • K(b);P-FLIGHT::QAR1(E)
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).