MESON Chess Problem Database

Problem Display
PID: 172107 (1bB4N/5pp1/3Rqn1B/3b1kN1/3P3Q/5r1P/3n1RP1/7K w - - 0 1)

Apro, Laszlo

Els Escacs a Catalunya, 1930

1bB4N/5pp1/3Rqn1B/3b1kN1/3P3Q/5r1P/3n1RP1/7K

#2

11 + 9

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rf4
      • 2.Rxf4#
      • 2.Qxf4#
    • 1...Sde4
      • 2.Rxf3#
  • Tries
    • 1.Rxd5+?
      • 1...Be5
        • 2.Rxe5#
      • 1...Sxd5!
  • Keys
    • 1.Se4!
      • threat
        • 2.Sg3#
      • 1...Bxe4
        • 2.Qg5#
      • 1...Bxd6
        • 2.Sxd6#
      • 1...Sdxe4
        • 2.Rxf3#
      • 1...Sfxe4
        • 2.g4#
      • 1...Sf1
        • 2.Rxf3#
      • 1...Sh5
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD,S_CUTB(c)::R(B),XR(b)
  • Tries
    • Try
      • R(H);CHECK,XB(c)
      • Vars
        • B(i);N_GUARD,P_SPINB(i)::R1(H),XB(i)
      • Refutation
        • S(f);XR(H)
  • Actual
    • S(G);
    • Threat
      • S(G)
    • Vars
      • B(c);SBLOCK,XS(G)::QAR1(F)
      • B(i);XR(H)::S(G),XB(i)
      • S(a);N_GUARD,XS(G)::R(B),XR(b)
      • S(f);N_GUARD,SBLOCK,XS(G)::P(C)
      • S(a);N_GUARD::R(B),XR(b)
      • S(f);N_GUARD::QAB1(F)
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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).