MESON Chess Problem Database

Problem Display
PID: 206929 (8/8/3Q4/8/4k3/6P1/2P5/4KN2 w - - 0 1)

van den Bergh, Pieter Theodor Lodewijk Helvetius

Sissa, 1853

8/8/3Q4/8/4k3/6P1/2P5/4KN2

#2

5 + 1

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Sd2+?
      • 1...Ke3
        • 2.Qf4#
        • 2.Qc5#
        • 2.Qe5#
        • 2.Qd3#
        • 2.Qb6#
      • 1...Kf5!
    • 1.Sh2?
      • 1...Ke3
        • 2.Qf4#
        • 2.Qe5#
        • 2.Qd3#
      • 1...Kf5!
    • 1.Qe5+?
      • 1...Kf3
        • 2.Qe2#
      • 1...Kxe5!
    • 1.Qe6+?
      • 1...Kf3
        • 2.Qe2#
      • 1...Kd4!
  • Keys
    • 1.Se3!
      • threat
        • 2.Qf4#
      • 1...Kxe3
        • 2.Qf4#
        • 2.Qd3#
      • 1...Kf3
        • 2.Qf4#

FEATURES

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