MESON Chess Problem Database

Problem Display
PID: 231632 (1N6/1p3pp1/pP1pkrp1/K2N2Q1/2PP1p2/5P2/8/8 w - - 0 1)

Zilahi, Zoltan

Ujsag, 1927

1N6/1p3pp1/pP1pkrp1/K2N2Q1/2PP1p2/5P2/8/8

#2

8 + 9

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rf5
      • 2.Qe7#
  • Tries
    • 1.Ka4?
      • 1...Rf5
        • 2.Sc7#
        • 2.Qe7#
      • 1...a5!
    • 1.Kb4?
      • 1...Rf5
        • 2.Sc7#
        • 2.Qe7#
      • 1...a5+!
    • 1.Sxf4+?
      • 1...Rxf4
        • 2.d5#
      • 1...Ke7!
    • 1.Qh4?
      • 1...Kf5
        • 2.Qg4#
      • 1...Rf5
        • 2.Qe7#
      • 1...g5!
  • Keys
    • 1.c5!
      • 1...dxc5
        • 2.Qe5#
      • 1...Rf5
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(e);OGATE,P_PINS(E),SBLOCK::QAR1(F)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Refutation
        • P(b);
    • Try
      • K(D);S_FLIGHT
      • Refutation
        • P(b);CHECK
    • Try
      • S(E);CHECK,XP(a)
      • Vars
        • R(e);XS(E)::P(C)
      • Refutation
        • K(d);P-FLIGHT,P_SPINR(e)
    • Try
      • Q(F);
      • Vars
        • K(d);S_FLIGHT::QAB1(F)
        • R(e);OGATE,P_PINS(E),SBLOCK::QAR1(F)
      • Refutation
        • P(f);
  • Actual
    • P(B);
    • Vars
      • P(c);N_GUARD,XP(B)::QAR1(F)
      • R(e);::S(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).