MESON Chess Problem Database

Problem Display
PID: 206727 (8/3Np3/7R/5k2/8/5K1N/8/8 w - - 0 1)

Schonberger, Tibor

Magyar Sakkvilag, 1925

8/3Np3/7R/5k2/8/5K1N/8/8

#2

4 + 2

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...e5
      • 2.Rf6#
    • 1...e6
      • 2.Rf6#
  • Tries
    • 1.Ra6?
      • 1...e5
        • 2.Rf6#
      • 1...e6!
    • 1.Rb6?
      • 1...e5
        • 2.Rf6#
      • 1...e6!
    • 1.Rc6?
      • 1...e5
        • 2.Rf6#
      • 1...e6!
    • 1.Rg6?
      • 1...e5
        • 2.Rf6#
      • 1...e6
        • 2.Rg5#
        • 2.Rf6#
      • 1...Kxg6!
  • Keys
    • 1.Sf4!
      • threat
        • 2.Rh5#
      • 1...Kg5
        • 2.Rh5#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • P(b);N_GUARD::R1(C)
  • Tries
    • Try
      • R(C);
      • Vars
        • P(b);N_GUARD::R1(C)
      • Refutation
        • P(b);
    • Try
      • R(C);
      • Vars
        • P(b);N_GUARD::R1(C)
      • Refutation
        • P(b);
    • Try
      • R(C);
      • Vars
        • P(b);N_GUARD::R1(C)
      • Refutation
        • P(b);
    • Try
      • R(C);
      • Vars
        • P(b);N_GUARD::R1(C)
      • Refutation
        • K(a);S_FLIGHT,XR(C)
  • Actual
    • S(B);
    • Threat
      • R(C)
    • Vars
      • K(a);P-FLIGHT::R1(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).