MESON Chess Problem Database

Problem Display
PID: 262463 (5Q1n/2Kp2pq/3Nk2r/4pppb/2P4n/4N3/8/8 w - - 0 1)

Onkoud, Abdelaziz

Europe Echecs, 1996

5Q1n/2Kp2pq/3Nk2r/4pppb/2P4n/4N3/8/8

#2

5 + 11

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Sg6
      • 2.Qf7#
  • Tries
    • 1.Se4?
      • threat
        • 2.Sc5#
        • 2.Sxg5#
      • 1...Qg6
        • 2.Sc5#
      • 1...Rg6
        • 2.Sc5#
        • 2.Qe8#
      • 1...Bf7
        • 2.Qd6#
      • 1...Sf3
        • 2.Sc5#
      • 1...Sf7
        • 2.Qe8#
      • 1...g4
        • 2.Sc5#
        • 2.Sg5#
      • 1...d6
        • 2.Sxg5#
      • 1...fxe4!
    • 1.Qe8+?
      • 1...Kf6
        • 2.Sd5#
      • 1...Bxe8!
  • Keys
    • 1.Sd5!
      • threat
        • 2.Qe7#
      • 1...S4g6
        • 2.Qxf5#
      • 1...S8g6
        • 2.Qf7#
      • 1...g6
        • 2.Qf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(k);N_GUARD,S_CUTB(e)::QAB1(E)
  • Tries
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Vars
        • Q(j);::S(C)
        • B(e);SBLOCK::QAR1(E)
        • S(a);::S(C)
        • S(k);S_CUTB(e)::QAR2(E)
        • P(h);::S(C),XP(d)
      • Refutation
        • P(c);XS(C)
    • Try
      • Q(E);CHECK
      • Vars
        • K(f);P-FLIGHT,S_CUTB(e)::S(A)
      • Refutation
        • B(e);XQ(E)
  • Actual
    • S(A);
    • Threat
      • QAR1(E)
    • Vars
      • S(a);N_GUARD,S_CUTQ(j)::QAB1(E),XP(c)
      • S(k);N_GUARD,S_CUTB(e)::QAB1(E)
      • P(i);N_GUARD,S_CUTR(g)::QAR1(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).