MESON Chess Problem Database

Problem Display
PID: 205684 (8/8/4pK2/4N3/8/5Pk1/6P1/6Q1 w - - 0 1)

Neukomm, Gyula (Julius) R

Deutsche Schachblatter, 1925

8/8/4pK2/4N3/8/5Pk1/6P1/6Q1

#2

5 + 2

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.g3#
    • 1...Kh4
      • 2.Qh2#
  • Tries
    • 1.Kg6?
      • 1...Kh4
        • 2.Qf2#
        • 2.Qh2#
        • 2.Qe1#
      • 1...Kf4!
    • 1.Sd3?
      • 1...Kh4
        • 2.Qh2#
      • 1...e5!
    • 1.Sc4?
      • 1...Kf4
        • 2.Qh2#
      • 1...Kh4
        • 2.Qh2#
      • 1...e5!
    • 1.f4?
      • 1...Kh4
        • 2.Qh2#
      • 1...Kxf4!
  • Keys
    • 1.Sg4!
      • threat
        • 2.Qh2#
      • 1...Kf4
        • 2.Qh2#
      • 1...Kh4
        • 2.Qh2#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(a);OGATE,S_FLIGHT::P(B)
    • K(a);S_FLIGHT::QAR2(A)
  • Tries
    • Try
      • K(E);P-FLIGHT
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(D);
      • Vars
        • K(a);S_FLIGHT::QAR2(A)
      • Refutation
        • P(b);
    • Try
      • S(D);
      • Vars
        • K(a);S_FLIGHT::QAB(A)
        • K(a);S_FLIGHT::QAR2(A)
      • Refutation
        • P(b);
    • Try
      • P(C);
      • Vars
        • K(a);S_FLIGHT::QAR2(A)
      • Refutation
        • K(a);S_FLIGHT,XP(C)
  • Actual
    • S(D);
    • Threat
      • QAB1(A)
    • Vars
      • K(a);S_FLIGHT::QAB(A)
      • K(a);S_FLIGHT::QAR2(A)
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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).