MESON Chess Problem Database

Problem Display
PID: 6029 (1N3k2/4RP1K/4R3/4n3/8/8/8/8 w - - 0 1)

Schonberger, Tibor

1st HM., L'Echiquier Marseillais, 1925-1926

1N3k2/4RP1K/4R3/4n3/8/8/8/8

#2

5 + 2

2012 Miniature Chess Problems from Many Countries 1981
273 Mat Plus 1995
2838 Fun with Chess Miniatures 1996
5454 Near Snap 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sd3
      • 2.Sd7#
    • 1...Sf3
      • 2.Sd7#
    • 1...Sc4
      • 2.Sd7#
    • 1...Sg4
      • 2.Sd7#
    • 1...Sc6
      • 2.Sd7#
    • 1...Sg6
      • 2.Sd7#
    • 1...Sd7
      • 2.Sxd7#
    • 1...Sxf7
      • 2.Sd7#
      • 2.Re8#
  • Tries
    • 1.Ra7?
      • threat
        • 2.Re8#
      • 1...Sxf7
        • 2.Sd7#
      • 1...Sd7!
    • 1.Rb7?
      • threat
        • 2.Re8#
      • 1...Sxf7
        • 2.Sd7#
      • 1...Sd7!
    • 1.Rc7?
      • threat
        • 2.Re8#
      • 1...Sxf7
        • 2.Sd7#
      • 1...Sd7!
  • Keys
    • 1.Rf6!
      • threat
        • 2.Re8#
      • 1...Kxe7
        • 2.f8Q#
      • 1...Sxf7
        • 2.Rfxf7#

This anticipates 177533(1976)

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • S(a);N_GUARD::S(E)
    • S(a);N_GUARD::S(E),XS(a)
  • Tries
    • Try
      • R(B);
      • Threat
        • R1(A)
      • Vars
        • S(a);N_GUARD,SBLOCK,XP(C)::S(E)
      • Refutation
        • S(a);
    • Try
      • R(B);
      • Threat
        • R1(A)
      • Vars
        • S(a);N_GUARD,SBLOCK,XP(C)::S(E)
      • Refutation
        • S(a);
    • Try
      • R(B);
      • Threat
        • R1(A)
      • Vars
        • S(a);N_GUARD,SBLOCK,XP(C)::S(E)
      • Refutation
        • S(a);
  • Actual
    • R(A);
    • Threat
      • R1(B)
    • Vars
      • K(b);OGATE,S_FLIGHT,XR(B)::P=Q
      • S(a);OGATE,P_SPINS(a),XP(C)::R1(A),XS(a)
HTML5 logo

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).