MESON Chess Problem Database

Problem Display
PID: 250278 (8/3N4/2pk4/2N5/8/3K4/8/7Q w - - 0 1)

Dubina, A

Uralski Problemist, 2008

8/3N4/2pk4/2N5/8/3K4/8/7Q

#2

4 + 2

SOLUTION

  • SOUND
  • Tries
    • 1.Qf3?
      • 1...Ke7
        • 2.Qf8#
      • 1...Kc7!
    • 1.Qe1?
      • threat
        • 2.Qe5#
      • 1...Kd5
        • 2.Qe5#
        • 2.Qe6#
      • 1...Kc7!
    • 1.Qh2+?
      • 1...Kd5
        • 2.Qe5#
      • 1...Ke7!
    • 1.Qh4?
      • 1...Kd5
        • 2.Qd4#
      • 1...Kc7!
    • 1.Qh6+?
      • 1...Kd5
        • 2.Qe6#
      • 1...Ke7
        • 2.Qf8#
      • 1...Kc7!
  • Keys
    • 1.Qh8!
      • threat
        • 2.Qe5#
      • 1...Kd5
        • 2.Qd4#
        • 2.Qe5#
      • 1...Kc7
        • 2.Qb8#
      • 1...Ke7
        • 2.Qf8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Vars
        • K(b);N_GUARD,S_FLIGHT::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(b);N_GUARD,P-FLIGHT::QAR1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);N_GUARD,P-FLIGHT::QAB1(A)
        • K(b);N_GUARD,S_FLIGHT::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • K(b);N_GUARD,S_FLIGHT::QAB1(A)
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).