MESON Chess Problem Database

Problem Display
PID: 172465 (7Q/p1p5/8/k7/2K5/8/8/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kuban segodniya, 1999

7Q/p1p5/8/k7/2K5/8/8/8

#2

2 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Ka4
      • 2.Qa1#
  • Tries
    • 1.Qb2?
      • threat
        • 2.Qb5#
      • 1...Ka4
        • 2.Qa1#
        • 2.Qa2#
        • 2.Qb4#
      • 1...Ka6
        • 2.Qb5#
      • 1...a6
        • 2.Qb4#
      • 1...c6!
    • 1.Qe5+?
      • 1...Ka4
        • 2.Qa1#
      • 1...Ka6
        • 2.Qb5#
      • 1...Kb6
        • 2.Qb5#
      • 1...c5!
  • Keys
    • 1.Qb8!
      • threat
        • 2.Qxa7#
        • 2.Qb5#
      • 1...Ka4
        • 2.Qxa7#
        • 2.Qb4#
      • 1...Ka6
        • 2.Qb5#
      • 1...a6
        • 2.Qb4#
      • 1...c6
        • 2.Qxa7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • K(a);P-FLIGHT::QAR(B)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • K(a);P-FLIGHT::QAB1(B)
        • P(b);SBLOCK::QAB1(B)
      • Refutation
        • P(c);
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR(B)
        • K(a);P-FLIGHT::QAB1(B)
        • K(a);S_FLIGHT::QAR1(B)
      • Refutation
        • P(c);P_SPINP(c)
  • Actual
    • Q(B);
    • Threat
      • DUALS(2)
    • Vars
      • K(a);P-FLIGHT::QAB1(B)
      • P(b);SBLOCK::QAB1(B)
      • P(c);::QAR2(B),XP(b)
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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).