MESON Chess Problem Database

Problem Display
PID: 144566 (5r2/6Qq/p3B3/K1pb2nP/5k1N/R1n5/3PpN1P/6B1 w - - 0 1)

Kovacs, Norbert

Magyar Sakkvilag, 1931

5r2/6Qq/p3B3/K1pb2nP/5k1N/R1n5/3PpN1P/6B1

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Qc7#
    • 1...Qc2
      • 2.Qc7#
    • 1...Qd3
      • 2.Qc7#
    • 1...Qg6
      • 2.Qc7#
    • 1...Qg8
      • 2.Qc7#
    • 1...Qxh5
      • 2.Qc7#
    • 1...Qh6
      • 2.Qc7#
    • 1...Sce4
      • 2.Sd3#
      • 2.Sg2#
    • 1...Sf3
      • 2.Sg2#
      • 2.Qg3#
    • 1...Sh3
      • 2.Qg3#
    • 1...Sge4
      • 2.Sd3#
      • 2.Sh3#
    • 1...Sxe6
      • 2.Qg3#
    • 1...Sf7
      • 2.Qg3#
  • Tries
    • 1.Qd4+?
      • 1...Qe4
        • 2.Sd3#
      • 1...Be4
        • 2.Sd3#
        • 2.Qd6#
      • 1...Sce4
        • 2.Sd3#
        • 2.Sg2#
      • 1...Sge4
        • 2.Sh3#
      • 1...cxd4!
  • Keys
    • 1.h3!
      • threat
        • 2.Bh2#
      • 1...Kg3
        • 2.Qxg5#
      • 1...Qd3
        • 2.Qc7#
      • 1...Sce4
        • 2.Sg2#
      • 1...Sf3
        • 2.Sg2#
      • 1...Sge4
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 9
  • Sets
    • Q(h);N_GUARD::QAB(J)
    • Q(h);N_GUARD,XP(H)::QAB(J)
    • S(f);OGATE::QAB1(J)
    • S(f);OGATE,XB(I)::QAB1(J)
  • Tries
    • Try
      • Q(J);CHECK
      • Vars
        • Q(h);P_SPINQ(h)::S(C)
        • S(f);P_SPINS(f)::S(C)
      • Refutation
        • P(d);XQ(J)
  • Actual
    • P(D);
    • Threat
      • B(A)
    • Vars
      • K(c);P_SPINS(b),S_FLIGHT::QAR2(J),XS(f)
      • Q(h);N_GUARD::QAB(J)
      • S(b);S_CUTB(e)::S(F)
      • S(f);SBLOCK,S_CUTB(e)::S(F)
      • S(f);SBLOCK,S_CUTQ(h)::S(C)
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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).