MESON Chess Problem Database

Problem Display
PID: 176142 (8/K7/4PR2/7B/3Q1p2/8/3P1N1P/4krb1 w - - 0 1)

Zilahi, Zoltan

6th Prize, Schach-Echo, 1934

8/K7/4PR2/7B/3Q1p2/8/3P1N1P/4krb1

#2

8 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...f3
      • 2.Qe3#
  • Tries
    • 1.Qe5+?
      • 1...Kxf2
        • 2.Qe2#
      • 1...Kxd2!
    • 1.Qe4+?
      • 1...Kxf2
        • 2.Rxf4#
        • 2.Qe2#
      • 1...Kxd2!
  • Keys
    • 1.Qc3!
      • 1...Bxf2+
        • 2.d4#
      • 1...Kxf2
        • 2.Qg3#
      • 1...Rxf2
        • 2.Qc1#
      • 1...Bxh2
        • 2.Sd3#
      • 1...f3
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(d);N_GUARD::QAR2(D)
  • Tries
    • Try
      • Q(D);CHECK,P_SPINS(B)
      • Vars
        • K(a);P_SPINP(d),S_FLIGHT,XS(B)::QAR1(D)
      • Refutation
        • K(a);S_FLIGHT,XP(A)
    • Try
      • Q(D);CHECK,P_SPINS(B)
      • Refutation
        • K(a);S_FLIGHT,XP(A)
  • Actual
    • Q(D);P_SPINS(B)
    • Vars
      • B(c);CHECK,SBLOCK,XS(B)::QAB(D)+P(A)
      • K(a);OGATEB,P_SPINP(d),S_FLIGHT,XS(B)::QAB1(D)
      • R(b);SBLOCK,XS(B)::QAR2(D)
      • B(c);N_PINS(B),XP(C)::S(B)
      • P(d);N_GUARD::QAR2(D)
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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).