MESON Chess Problem Database

Problem Display
PID: 255098 (5n1K/1BNk2PR/1pN1p1p1/1r6/3b1Q2/8/5q2/3R4 w - - 0 1)

von Szasz, Lajos

Schackvarlden, 1928

5n1K/1BNk2PR/1pN1p1p1/1r6/3b1Q2/8/5q2/3R4

#2

8 + 8

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Re5
      • 2.gxf8Q#
      • 2.gxf8B#
    • 1...e5
      • 2.gxf8Q#
      • 2.gxf8B#
  • Tries
    • 1.Rxd4+?
      • 1...Rd5
        • 2.gxf8Q#
        • 2.gxf8S#
        • 2.gxf8B#
        • 2.gxf8R#
      • 1...Qxd4!
    • 1.Qf7+?
      • 1...Kd6
        • 2.Qe7#
      • 1...Qxf7!
  • Keys
    • 1.Se5+!
      • 1...Kd6
        • 2.gxf8Q#
        • 2.gxf8B#
      • 1...Kxc7
        • 2.gxf8Q#
      • 1...Ke7
        • 2.gxf8Q#
      • 1...Kd8
        • 2.gxf8Q#
        • 2.gxf8R#
      • 1...Rxe5
        • 2.gxf8Q#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(c);N_PINP(F)::PXS(h)=Q
    • P(e);N_PINP(F)::PXS(h)=Q
  • Tries
    • Try
      • R(A);CHECK,N_SPINP(F),XB(b)
      • Refutation
        • Q(a);P_PINP(F),XR(A)
    • Try
      • Q(B);CHECK
      • Vars
        • K(g);P-FLIGHT::QAB1(B)
      • Refutation
        • Q(a);XQ(B)
  • Actual
    • S(C);CHECK,N_SPINP(F)
    • Vars
      • K(g);P-FLIGHT::PXS(h)=Q
      • K(g);N_SPINB(b),P-FLIGHT,XS(E)::PXS(h)=Q
      • K(g);N_SPINB(b),P-FLIGHT::PXS(h)=Q
      • R(c);XS(C)::PXS(h)=Q
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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).