MESON Chess Problem Database

Problem Display
PID: 205725 (2n1Bbrr/R3p1pk/8/5N2/1Q4N1/K7/8/8 w - - 0 1)

Kovacs, Florian Janos

Unterfrankische Arbeiter-Schachzeitung, 1925

2n1Bbrr/R3p1pk/8/5N2/1Q4N1/K7/8/8

#2

6 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...e5
      • 2.Sf6#
    • 1...e6
      • 2.Sf6#
    • 1...g5
      • 2.Sf6#
    • 1...g6
      • 2.Sf6#
  • Tries
    • 1.Qd6?
      • threat
        • 2.Bg6#
        • 2.Qh2#
        • 2.Qg6#
      • 1...exd6
        • 2.Sf6#
      • 1...e5
        • 2.Sf6#
        • 2.Bg6#
      • 1...e6
        • 2.Sf6#
      • 1...g5
        • 2.Sf6#
      • 1...g6
        • 2.Sf6#
      • 1...Sxd6!
    • 1.Qb1?
      • threat
        • 2.Qh1#
      • 1...e6+
        • 2.Sd6#
      • 1...g5
        • 2.Sf6#
      • 1...g6
        • 2.Sf6#
      • 1...e5+!
  • Keys
    • 1.Qe4!
      • threat
        • 2.Qh1#
      • 1...e5+
        • 2.Sd6#
      • 1...e6+
        • 2.Sd6#
      • 1...g5
        • 2.Sf6#
      • 1...g6
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • P(a);N_GUARD,P_PINQ(B),P_SPINP(b)::S(C)
    • P(b);N_GUARD,P_SPINP(a)::S(C)
  • Tries
    • Try
      • Q(B);
      • Threat
        • DUALS(3)
      • Vars
        • P(a);N_GUARD,P_SPINP(b),XQ(B)::S(C)
        • P(a);N_GUARD,P_PINQ(B),P_SPINP(b)::S(C)
        • P(b);N_GUARD,P_SPINP(a)::S(C)
      • Refutation
        • S(d);XQ(B)
    • Try
      • Q(B);
      • Threat
        • QAR(B)
      • Vars
        • P(a);CHECK,P_SPINP(b)::QAB(B)+S(D)
        • P(b);N_GUARD,P_SPINP(a)::S(C)
      • Refutation
        • P(a);CHECK,P_SPINP(b)
  • Actual
    • Q(B);
    • Threat
      • QAR(B)
    • Vars
      • P(a);CHECK,P_SPINP(b)::QAB(B)+S(D)
      • P(b);N_GUARD,P_SPINP(a)::S(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).