MESON Chess Problem Database

Problem Display
PID: 241395 (8/8/3ppp2/B3kN2/3p1p2/3PNP1Q/7K/8 w - - 0 1)

Hjelle, David

Parallele 50, 1948

8/8/3ppp2/B3kN2/3p1p2/3PNP1Q/7K/8

#2

7 + 6

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...d5
      • 2.Bc7#
    • 1...exf5
      • 2.Qxf5#
  • Tries
    • 1.Sg4+?
      • 1...Kxf5
        • 2.Qh5#
      • 1...Kd5!
    • 1.Bc3?
      • threat
        • 2.Bxd4#
      • 1...dxc3
        • 2.d4#
      • 1...exf5
        • 2.Qxf5#
      • 1...fxe3!
    • 1.Qg4?
      • 1...fxe3
        • 2.Qe4#
      • 1...exf5
        • 2.Qxf5#
      • 1...d5
        • 2.Bc7#
      • 1...dxe3!
  • Keys
    • 1.Se7!
      • threat
        • 2.Sc4#
        • 2.Sg4#
        • 2.Sc6#
        • 2.Sg6#
      • 1...dxe3
        • 2.Bc3#
      • 1...fxe3
        • 2.Qg3#
      • 1...d5
        • 2.Bc7#
      • 1...f5
        • 2.Qh8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • P(d);OGATEB::B(F)
    • P(e);OGATE,XS(G)::QAR1(E),XP(e)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(c);P-FLIGHT,XS(G)::QAR2(E)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • B(F);P_PINP(a)
      • Threat
        • B(F),XP(a)
      • Vars
        • P(a);N_SPINP(a),OGATE,XB(F)::P(B)
        • P(e);OGATE,XS(G)::QAR1(E),XP(e)
      • Refutation
        • P(b);XS(C)
    • Try
      • Q(E);
      • Vars
        • P(b);OGATE,XS(C)::QAR1(E)
        • P(e);OGATE,XS(G)::QAR1(E),XP(e)
        • P(d);OGATEB::B(F)
      • Refutation
        • P(a);XS(C)
  • Actual
    • S(G);
    • Threat
      • DUALS(4)
    • Vars
      • P(a);OGATEB,XS(C)::B(F)
      • P(b);OGATEB,XS(C)::QAB(E)
      • P(d);OGATEB::B(F)
      • P(f);OGATEB::QAB(E)
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).