MESON Chess Problem Database

Problem Display
PID: 235509 (2nr4/3p3Q/8/K1p2R2/1pr1k1P1/1N1p3p/2n2q2/3N4 w - - 0 1)

Dikusarov, Andrey Nikolayovich

Schach, 2007

2nr4/3p3Q/8/K1p2R2/1pr1k1P1/1N1p3p/2n2q2/3N4

#2

6 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qd4
      • 2.Sd2#
    • 1...Qxf5
      • 2.Qxf5#
    • 1...Rd4
      • 2.Sxc5#
    • 1...Se3
      • 2.Sxf2#
    • 1...Sb6
      • 2.Qe7#
    • 1...Sd6
      • 2.Qe7#
    • 1...Sa7
      • 2.Qe7#
    • 1...Se7
      • 2.Qxe7#
  • Tries
    • 1.Sd2+?
      • 1...Kd4
        • 2.Qg7#
      • 1...Qxd2!
  • Keys
    • 1.Qf7!
      • threat
        • 2.Qd5#
      • 1...Qxf5
        • 2.Qxf5#
      • 1...Qd4
        • 2.Sd2#
      • 1...Rd4
        • 2.Sxc5#
      • 1...Se3
        • 2.Sxf2#
      • 1...Sb6
        • 2.Qe7#
      • 1...Se7
        • 2.Qxe7#
      • 1...d5
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • Q(b);N_GUARD,SBLOCK::S(B)
    • Q(b);OGATE,P_SPINQ(b),XR(E)::QAB1(F),XQ(b)
    • R(f);N_GUARD,SBLOCK,S_CUTQ(b)::S(B),XP(h)
    • S(a);SBLOCK::S(A),XQ(b)
    • S(j);N_GUARD::QAR(F)
    • S(j);N_GUARD::QAR(F),XS(j)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(g);P-FLIGHT::QAB(F)
      • Refutation
        • Q(b);XS(B)
  • Actual
    • Q(F);
    • Threat
      • QAB1(F)
    • Vars
      • Q(b);OGATE,XR(E)::QAB1(F),XQ(b)
      • Q(b);N_GUARD,SBLOCK::S(B)
      • R(f);N_GUARD,SBLOCK,S_CUTQ(b)::S(B),XP(h)
      • S(a);SBLOCK::S(A),XQ(b)
      • S(j);N_GUARD::QAR(F)
      • S(j);N_GUARD::QAR(F),XS(j)
      • P(i);N_GUARD::QAR2(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).