MESON Chess Problem Database

Problem Display
PID: 243337 (3R4/2Pr1p1B/1KN1b1NQ/2Pk1nb1/7p/1P1n2p1/6P1/3R4 w - - 0 1)

Apro, Laszlo

Parallele 50, 1952

3R4/2Pr1p1B/1KN1b1NQ/2Pk1nb1/7p/1P1n2p1/6P1/3R4

#2

11 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Rxd3+?
      • 1...Sd4
        • 2.Rxd4#
      • 1...Ke4!
  • Keys
    • 1.Qh5!
      • threat
        • 2.Qf3#
      • 1...Ke4
        • 2.Qf3#
      • 1...Sd4
        • 2.Sge7#
      • 1...Sd6
        • 2.Sf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(A);CHECK,XS(a)
      • Vars
        • S(e);N_GUARD,P_SPINS(e)::R1(A),XS(e)
      • Refutation
        • K(d);N_SPINR(h),S_FLIGHT
  • Actual
    • Q(H);
    • Threat
      • QAB(H)
    • Vars
      • K(d);N_SPINR(h),N_SPINS(a),S_FLIGHT::QAB1(H)
      • S(e);N_GUARD,N_SPINS(a),P_SPINB(f)::S(G)
      • S(e);N_SPINR(h),P_SPINB(f)::S(G)
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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).