MESON Chess Problem Database

Problem Display
PID: 174326 (6N1/3Kpp2/8/4BkpQ/8/3P4/8/8 w - - 0 1)

Milward de Azevedo, Sergio

Sonnenfeld, Felix Alexander

Boletim da UBP, 1986

6N1/3Kpp2/8/4BkpQ/8/3P4/8/8

#2

5 + 4

SOLUTION

  • SOUND
  • Tries
    • 1.Qf3+?
      • 1...Kxe5
        • 2.Qe4#
      • 1...Kg6!
    • 1.Qh3+?
      • 1...Kg6
        • 2.Sxe7#
      • 1...g4
        • 2.Qh5#
      • 1...Kxe5!
    • 1.Qh4?
      • threat
        • 2.Qe4#
      • 1...Kxe5
        • 2.Qe4#
      • 1...Kg6
        • 2.Sxe7#
      • 1...g4
        • 2.Qh5#
      • 1...gxh4!
    • 1.Qh7+?
      • 1...Kxe5
        • 2.Qe4#
      • 1...Kg4!
  • Keys
    • 1.Qh1!
      • threat
        • 2.Qe4#
      • 1...Kg4
        • 2.Sh6#
      • 1...Kxe5
        • 2.Qe4#
      • 1...Kg6
        • 2.Sxe7#
      • 1...g4
        • 2.Qh5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(C);CHECK,N_PINP(b)
      • Vars
        • K(a);P-FLIGHT,XB(B)::QAR1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);CHECK,N_PINP(b)
      • Vars
        • K(a);S_FLIGHT::S(E),XP(c)
        • P(b);OGATEB,P_SPINP(b)::QAR2(C)
      • Refutation
        • K(a);P-FLIGHT,XB(B)
    • Try
      • Q(C);N_PINP(b)
      • Threat
        • QAB1(C)
      • Vars
        • K(a);P-FLIGHT,XB(B)::QAR1(C)
        • K(a);S_FLIGHT::S(E),XP(c)
        • P(b);OGATEB::QAR2(C)
      • Refutation
        • P(b);XQ(C)
    • Try
      • Q(C);CHECK,N_PINP(b)
      • Vars
        • K(a);OGATE,P-FLIGHT,XB(B)::QAR1(C)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(C);N_PINP(b)
    • Threat
      • QAB1(C)
    • Vars
      • K(a);S_FLIGHT::S(E)
      • K(a);P-FLIGHT,XB(B)::QAR1(C)
      • K(a);S_FLIGHT::S(E),XP(c)
      • P(b);OGATEB::QAR2(C)
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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).