MESON Chess Problem Database

Problem Display
PID: 173642 (1B4bR/2r4r/2p2pP1/2Q2P1P/1R3K1k/7N/5N2/3B3n w - - 0 1)

Boros, Sandor

5th Prize, Isaev MT, 1933-1934

1B4bR/2r4r/2p2pP1/2Q2P1P/1R3K1k/7N/5N2/3B3n

#2

11 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rcf7
      • 2.Ke3#
    • 1...Rxh5
      • 2.Rxh5#
    • 1...Rhf7
      • 2.Kf3#
  • Tries
    • 1.Qd4?
      • threat
        • 2.Qxf6#
      • 1...Rcf7
        • 2.Ke3#
      • 1...Rhf7
        • 2.Kf3#
      • 1...Sxf2!
  • Keys
    • 1.Qc3!
      • threat
        • 2.Qxf6#
      • 1...Sxf2
        • 2.Qg3#
      • 1...Rcf7
        • 2.Ke3#
      • 1...Rhf7
        • 2.Kf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • R(e);S_CUTB(g)::R(D)+K(E)
    • R(f);OGATE,P_SPINR(f),XP(H)::R1(K),XR(f)
    • R(f);S_CUTB(g)::R(D)+K(E)
  • Tries
    • Try
      • Q(F);
      • Threat
        • QAB(F),XP(d)
      • Vars
        • R(e);::QAR(F)+K(E)
        • R(f);::QAR(F)+K(E)
      • Refutation
        • S(a);XS(B)
  • Actual
    • Q(F);
    • Threat
      • QAB(F),XP(d)
    • Vars
      • S(a);N_GUARD,XS(B)::QAB1(F)
      • R(e);S_CUTB(g)::R(D)+K(E)
      • R(f);S_CUTB(g)::R(D)+K(E)
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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).