MESON Chess Problem Database

Problem Display
PID: 136012 (8/4pN2/4Bp2/5p2/5k2/1Qb2P2/4nPPP/1K6 w - - 0 1)

Benjelloun, Youness

Mat Plus, 2009

8/4pN2/4Bp2/5p2/5k2/1Qb2P2/4nPPP/1K6

#2

8 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Ba1
      • 2.Qe3#
    • 1...Be1
      • 2.Qe3#
      • 2.Qb8#
    • 1...Bb2
      • 2.Qe3#
    • 1...Bd2
      • 2.Qb8#
    • 1...Bb4
      • 2.Qe3#
    • 1...Ba5
      • 2.Qe3#
    • 1...Be5
      • 2.Qe3#
    • 1...Sg3
      • 2.hxg3#
    • 1...Sd4
      • 2.Qb8#
  • Tries
    • 1.Qc2?
      • threat
        • 2.Qxf5#
      • 1...Sg3
        • 2.hxg3#
      • 1...Sd4!
    • 1.Qc4+?
      • 1...Sd4
        • 2.Qc7#
      • 1...Bd4!
    • 1.Qb5?
      • threat
        • 2.Qxf5#
      • 1...Sg3
        • 2.hxg3#
      • 1...Sd4
        • 2.Qb8#
      • 1...Be5!
    • 1.Qb6?
      • threat
        • 2.Qe3#
      • 1...Bd2
        • 2.Qc7#
        • 2.Qb8#
      • 1...Sd4
        • 2.Qc7#
        • 2.Qb8#
      • 1...Bd4!
  • Keys
    • 1.Qd5!
      • threat
        • 2.Qxf5#
      • 1...Be5
        • 2.Qd2#
      • 1...Sg3
        • 2.hxg3#
      • 1...Sd4
        • 2.g3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 5
  • Sets
    • B(b);OGATE::QAB1(E)
    • B(b);N_GUARD::QAB(E)
    • S(a);OGATE::P(D),XS(a)
    • S(a);S_CUTB(b)::QAB(E)
  • Tries
    • Try
      • Q(E);
      • Threat
        • QAR1(E),XP(d)
      • Vars
        • S(a);OGATE::P(D),XS(a)
      • Refutation
        • S(a);
    • Try
      • Q(E);CHECK
      • Vars
        • S(a);P_SPINS(a),S_CUTB(b)::QAB(E)
      • Refutation
        • B(b);P_SPINB(b)
    • Try
      • Q(E);
      • Threat
        • QAR1(E),XP(d)
      • Vars
        • S(a);OGATE::P(D),XS(a)
        • S(a);S_CUTB(b)::QAB(E)
      • Refutation
        • B(b);
    • Try
      • Q(E);
      • Threat
        • QAB1(E)
      • Refutation
        • B(b);
  • Actual
    • Q(E);
    • Threat
      • QAR1(E),XP(d)
    • Vars
      • B(b);N_GUARD::QAB(E)
      • S(a);OGATE::P(D),XS(a)
      • S(a);N_GUARD::P(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).