MESON Chess Problem Database

Problem Display
PID: 227846 (7N/7p/3Qpk1K/8/8/6P1/8/8 w - - 0 1)

Pikler, Robert

Magyar Sakkvilag, 1926

7N/7p/3Qpk1K/8/8/6P1/8/8

#2

4 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kf5
      • 2.Qf4#
  • Tries
    • 1.Kxh7?
      • 1...Kf5
        • 2.Qf4#
      • 1...Kg5!
    • 1.Sg6?
      • threat
        • 2.Qf4#
        • 2.Qf8#
      • 1...Kf5
        • 2.Qf4#
      • 1...Kf7
        • 2.Qf8#
      • 1...hxg6!
    • 1.Sf7?
      • 1...Kf5
        • 2.Qf4#
      • 1...Kxf7!
  • Keys
    • 1.Qc7!
      • 1...Kf5
        • 2.Qf4#
      • 1...e5
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);N_SPINP(a),P-FLIGHT::QAR1(B)
  • Tries
    • Try
      • K(C);P-FLIGHT,XP(c)
      • Vars
        • K(b);N_SPINP(a),P-FLIGHT::QAR1(B)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
    • Try
      • S(D);
      • Threat
        • DUALS(2)
      • Vars
        • K(b);N_SPINP(a),P-FLIGHT::QAR1(B)
      • Refutation
        • P(c);XS(D)
    • Try
      • S(D);
      • Vars
        • K(b);N_SPINP(a),P-FLIGHT::QAR1(B)
      • Refutation
        • K(b);N_SPINP(a),P-FLIGHT,XS(D)
  • Actual
    • Q(B);N_PINP(a)
    • Vars
      • K(b);P-FLIGHT::QAR1(B)
      • P(a);SBLOCK::QAR1(B)
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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).