MESON Chess Problem Database

Problem Display
PID: 231595 (4K3/4p3/NN2p3/4k3/4P3/4R3/4Q3/4R3 w - - 0 1)

Schonberger, Tibor

Allgemeine Zeitung Chemnitz, 1927

4K3/4p3/NN2p3/4k3/4P3/4R3/4Q3/4R3

#2

7 + 3

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qb2#
  • Tries
    • 1.Kxe7?
      • 1...Kd4
        • 2.Qb2#
      • 1...Kf4!
    • 1.Rf3?
      • 1...Kd4
        • 2.Qb2#
      • 1...Kd6!
    • 1.Qf3?
      • 1...Kd6
        • 2.e5#
      • 1...Kd4!
    • 1.Qg4?
      • 1...Kd4
        • 2.e5#
      • 1...Kf6
        • 2.Sd7#
        • 2.e5#
      • 1...Kd6!
    • 1.Qh5+?
      • 1...Kd4
        • 2.Qc5#
      • 1...Kf4
        • 2.Rf3#
      • 1...Kd6
        • 2.Qc5#
      • 1...Kf6!
    • 1.Qf2?
      • 1...Kd4
        • 2.Qb2#
      • 1...Kd6!
    • 1.Qh2+?
      • 1...Kd4
        • 2.Qb2#
      • 1...Kf6!
  • Keys
    • 1.Qg2!
      • 1...Kd4
        • 2.Qb2#
      • 1...Kf4
        • 2.Qg3#
      • 1...Kd6
        • 2.e5#
      • 1...Kf6
        • 2.Sd7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAB(B)
  • Tries
    • Try
      • K(G);P-FLIGHT,XP(c)
      • Vars
        • K(a);S_FLIGHT::QAB(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(C);
      • Vars
        • K(a);S_FLIGHT::QAB(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);OGATE,S_FLIGHT::P(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR(B)+P(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(B)
        • K(a);S_FLIGHT::R1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);S_FLIGHT::QAB(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB(B)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(B);
    • Vars
      • K(a);S_FLIGHT::QAB(B)
      • K(a);S_FLIGHT::QAB1(B)
      • K(a);OGATE,S_FLIGHT::P(D)
      • K(a);S_FLIGHT::S(F)
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).