MESON Chess Problem Database

Problem Display
PID: 135536 (8/K7/3P4/kN1Q4/p7/Bq2p3/8/8 w - - 0 1)

Kwiatkowski, Vitaly I

StrateGems, 2009

8/K7/3P4/kN1Q4/p7/Bq2p3/8/8

#2

5 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Qd1
      • 2.Sd4#
    • 1...Qc2
      • 2.Sc3#
    • 1...Qc3
      • 2.Sxc3#
  • Tries
    • 1.Sc3+?
      • 1...Qb5
        • 2.Qxb5#
      • 1...Qxd5!
    • 1.Sd4+?
      • 1...Qb5
        • 2.Sc6#
        • 2.Qxb5#
      • 1...Qxd5!
    • 1.Sc7+?
      • 1...Qb5
        • 2.Qxb5#
      • 1...Qxd5!
  • Keys
    • 1.Qc5!
      • threat
        • 2.Qb6#
      • 1...Qf7+
        • 2.Sc7#
      • 1...Qxa3
        • 2.Sxa3#
      • 1...Qxb5
        • 2.Bb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • Q(a);N_GUARD::QAR(C)+S(B)
    • Q(a);N_GUARD::QAR(C)+S(B),XQ(a)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a)::QAR1(C),XQ(a)
      • Refutation
        • Q(a);XQ(C)
    • Try
      • S(B);CHECK
      • Refutation
        • Q(a);XQ(C)
    • Try
      • S(B);CHECK
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a)::QAR1(C),XQ(a)
      • Refutation
        • Q(a);XQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAB1(C)
    • Vars
      • Q(a);CHECK,N_GUARD::QAR(C)+S(B)
      • Q(a);XB(A)::QAR(C)+S(B),XQ(a)
      • Q(a);N_GUARD,P_SPINQ(a),XS(B)::B(A)
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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).