MESON Chess Problem Database

Problem Display
PID: 58091 (1K6/3R2pp/5p2/3pk2p/3N1p2/4nP2/3R1N2/6Q1 w - - 0 1)

Onkoud, Abdelaziz

Torre & Cavallo - Scacco!, 2001

1K6/3R2pp/5p2/3pk2p/3N1p2/4nP2/3R1N2/6Q1

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Sd1
      • 2.Sd3#
    • 1...Sf1
      • 2.Sd3#
    • 1...Sc2
      • 2.Sd3#
    • 1...Sg2
      • 2.Sd3#
    • 1...Sc4
      • 2.Sd3#
    • 1...Sg4
      • 2.Sd3#
    • 1...Sf5
      • 2.Sd3#
    • 1...f5
      • 2.Qxg7#
  • Tries
    • 1.Qg5+?
      • 1...Sf5
        • 2.Qxf5#
      • 1...f5
        • 2.Qe7#
        • 2.Qxg7#
      • 1...fxg5!
    • 1.Qg6?
      • threat
        • 2.Qe8#
      • 1...Sf5
        • 2.Qxf5#
      • 1...f5
        • 2.Sc6#
        • 2.Re7#
        • 2.Qd6#
        • 2.Qe6#
        • 2.Qxg7#
      • 1...hxg6!
  • Keys
    • 1.Kc7!
      • threat
        • 2.Re7#
      • 1...f5
        • 2.Qxg7#
      • 1...Sf5
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 6
  • Sets
    • S(a);::S(C)
    • P(f);OGATEB::QAB(A),XP(g)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAR1(A),XS(a)
      • Refutation
        • P(f);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAR(A)
      • Vars
        • S(a);N_GUARD::QAR1(A),XS(a)
      • Refutation
        • P(h);XQ(A)
  • Actual
    • K(G);S_FLIGHT
    • Threat
      • R(F)
    • Vars
      • P(f);OGATEB::QAB(A),XP(g)
      • S(a);::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).