MESON Chess Problem Database

Problem Display
PID: 169235 (5Q2/nK6/8/k7/p2P4/8/1P6/8 w - - 0 1)

Agapov, Igor Alexeyevich

6/11 Place, SuperProblem 181. TT, 2017

5Q2/nK6/8/k7/p2P4/8/1P6/8

#2

4 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kb5
      • 2.Qc5#
    • 1...Sc6
      • 2.Qc5#
    • 1...Sc8
      • 2.Qc5#
  • Tries
    • 1.Kxa7?
      • threat
        • 2.Qc5#
      • 1...Kb5
        • 2.Qc5#
      • 1...a3!
    • 1.b4+?
      • 1...Kb5
        • 2.Qc5#
      • 1...axb4 ep!
  • Keys
    • 1.Qa3!
      • 1...Kb5
        • 2.Qc5#
      • 1...Sb5
        • 2.b4#
      • 1...Sc6
        • 2.Qc5#
      • 1...Sc8
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT::QAR1(D)
    • S(c);N_GUARD::QAR2(D)
  • Tries
    • Try
      • K(C);P-FLIGHT,XS(c)
      • Threat
        • QAR2(D)
      • Vars
        • K(b);P-FLIGHT::QAR1(D)
      • Refutation
        • P(a);
    • Try
      • P(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(D)
      • Refutation
        • P(a);EP,XP(A)
  • Actual
    • Q(D);P_PINP(a)
    • Vars
      • K(b);N_SPINP(a),P-FLIGHT::QAR1(D)
      • S(c);SBLOCK::P(A)
      • S(c);N_GUARD::QAR2(D)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).