MESON Chess Problem Database

Problem Display
PID: 65992 (8/3Q4/5p2/R2p1n2/1nrPk3/2rN4/3P2PK/2N1BB2 w - - 0 1)

Apro, Laszlo

Schach, 1952

8/3Q4/5p2/R2p1n2/1nrPk3/2rN4/3P2PK/2N1BB2

#2

10 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd4
      • 2.Qe6#
    • 1...Sa2
      • 2.Qxd5#
    • 1...Sc2
      • 2.Qxd5#
    • 1...Sa6
      • 2.Qxd5#
    • 1...Sc6
      • 2.Qxd5#
    • 1...Sg3
      • 2.Qg4#
    • 1...Sxd4
      • 2.Qg4#
    • 1...Sh4
      • 2.Qg4#
    • 1...Sd6
      • 2.Qg4#
    • 1...Se7
      • 2.Qg4#
    • 1...Sg7
      • 2.Qg4#
  • Tries
    • 1.Qxf5+?
      • 1...Kxd4
        • 2.Se2#
        • 2.Bf2#
        • 2.Qg4#
        • 2.Qf4#
      • 1...Kxf5!
  • Keys
    • 1.Se2!
      • threat
        • 2.Sf2#
      • 1...Kxd3
        • 2.Qxf5#
      • 1...Rxd3
        • 2.Qe6#
      • 1...Rxd4
        • 2.Sxc3#
      • 1...Sxd3
        • 2.Qxd5#
      • 1...Sxd4
        • 2.Sg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 9
  • Sets
    • R(c);SBLOCK,XP(H)::QAR2(J)
    • S(b);N_GUARD::QAB1(J),XP(e)
    • S(f);OGATE::QAR2(J)
    • S(f);OGATE,SBLOCK,XP(H)::QAR2(J)
  • Tries
    • Try
      • Q(J);CHECK,XS(f)
      • Refutation
        • K(d);P_SPINP(e),S_FLIGHT,XQ(J)
  • Actual
    • S(A);
    • Threat
      • S(G)
    • Vars
      • K(d);S_FLIGHT,XS(G)::QAB(J),XS(f)
      • R(a);SBLOCK,XS(G)::QAR2(J)
      • R(c);N_GUARD,SBLOCK,XP(H)::S(A),XR(a)
      • S(b);N_GUARD,SBLOCK,XS(G)::QAB1(J),XP(e)
      • S(f);N_GUARD,SBLOCK,XP(H)::S(A)
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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).