MESON Chess Problem Database

Problem Display
PID: 172510 (8/1p6/p7/8/kP6/2P5/K7/5Q2 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kuban segodniya, 2002

8/1p6/p7/8/kP6/2P5/K7/5Q2

#2

4 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...b5
      • 2.Qd1#
    • 1...b6
      • 2.Qxa6#
  • Tries
    • 1.Kb2?
      • 1...b5
        • 2.Qa1#
        • 2.Qd1#
      • 1...b6
        • 2.Qxa6#
      • 1...a5!
    • 1.Qe2?
      • 1...b5
        • 2.Qd1#
        • 2.Qc2#
      • 1...b6
        • 2.Qxa6#
      • 1...a5!
    • 1.Qd3?
      • 1...b5
        • 2.Qc2#
        • 2.Qd1#
      • 1...b6
        • 2.Qxa6#
      • 1...a5!
    • 1.Qf5?
      • threat
        • 2.Qa5#
      • 1...a5
        • 2.Qxa5#
      • 1...b5
        • 2.Qc2#
      • 1...b6!
  • Keys
    • 1.Qc4!
      • 1...a5
        • 2.b5#
      • 1...b5
        • 2.Qb3#
      • 1...b6
        • 2.Qxa6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(c);SBLOCK::QAB(A)
    • P(c);N_GUARD::QAR2(A),XP(b)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Vars
        • P(c);N_GUARD::QAR2(A),XP(b)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Vars
        • P(c);N_GUARD::QAR2(A),XP(b)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Vars
        • P(c);N_GUARD::QAR2(A),XP(b)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • P(b);::QAR1(A),XP(b)
        • P(c);SBLOCK::QAB(A)
      • Refutation
        • P(c);
  • Actual
    • Q(A);
    • Vars
      • P(b);SBLOCK::QAR(A)+P(D)
      • P(c);SBLOCK::QAB1(A)
      • P(c);N_GUARD::QAR2(A),XP(b)
HTML5 logo

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).