MESON Chess Problem Database

Problem Display
PID: 151834 (8/4B3/4b3/4k3/4p3/8/1K1N4/6Q1 w - - 0 1)

Abdullayev, Elmar

The Problemist, 2013

8/4B3/4b3/4k3/4p3/8/1K1N4/6Q1

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Qg5#
    • 1...Kd5
      • 2.Qc5#
    • 1...Kf5
      • 2.Qg5#
  • Tries
    • 1.Qc5+?
      • 1...Kf4
        • 2.Qg5#
      • 1...Bd5!
    • 1.Qg3+?
      • 1...Kd5
        • 2.Qd6#
      • 1...Kf5
        • 2.Qg5#
      • 1...Kd4!
    • 1.Qg7+?
      • 1...Kf4
        • 2.Qg5#
      • 1...Kf5
        • 2.Qg5#
      • 1...Kd5!
  • Keys
    • 1.Qg6!
      • threat
        • 2.Qxe4#
      • 1...Kd4
        • 2.Qxe4#
      • 1...Kf4
        • 2.Qg5#
      • 1...Kd5
        • 2.Qxe4#
      • 1...Bd5
        • 2.Qf6#
      • 1...Bf5
        • 2.Qd6#
      • 1...e3
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • K(b);S_FLIGHT::QAB1(A)
    • K(b);P-FLIGHT::QAR1(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAB1(A)
      • Refutation
        • B(c);P_SPINB(c)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT::QAR1(A)
        • K(b);P-FLIGHT::QAR1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB1(A)
        • K(b);P-FLIGHT::QAR1(A)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAR1(A),XP(a)
    • Vars
      • K(b);S_FLIGHT::QAR1(A),XP(a)
      • K(b);S_FLIGHT::QAB1(A)
      • K(b);P-FLIGHT::QAB1(A),XP(a)
      • B(c);SBLOCK::QAB1(A)
      • B(c);OGATE,SBLOCK::QAB1(A)
      • P(a);::QAR1(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).