MESON Chess Problem Database

Problem Display
PID: 7768 (1Q6/pp6/k7/8/1PK5/8/8/8 w - - 0 1)

Chernushko, Mikhail Aleksandrovich

Smena, 1993

1Q6/pp6/k7/8/1PK5/8/8/8

#2

3 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Kb6
      • 2.Qd6#
    • 1...b5+
      • 2.Qxb5#
    • 1...b6
      • 2.Qc8#
  • Tries
    • 1.Kc5?
      • 1...b5
        • 2.Qxb5#
        • 2.Qc8#
      • 1...b6+!
    • 1.Qe5?
      • threat
        • 2.Qa5#
        • 2.Qb5#
      • 1...b5+
        • 2.Qxb5#
      • 1...Kb6
        • 2.Qd6#
      • 1...b6!
    • 1.Qc7?
      • threat
        • 2.Qa5#
        • 2.b5#
      • 1...b6
        • 2.Qc8#
      • 1...b5+!
    • 1.Qd8?
      • threat
        • 2.Qa5#
        • 2.b5#
      • 1...b6
        • 2.Qc8#
      • 1...b5+!
    • 1.Qe8?
      • threat
        • 2.Qb5#
      • 1...b5+
        • 2.Qxb5#
      • 1...b6
        • 2.Qc8#
      • 1...Kb6!
    • 1.Qf8?
      • 1...Kb6
        • 2.Qd6#
      • 1...b6
        • 2.Qc8#
      • 1...b5+!
  • Keys
    • 1.b5+!
      • 1...Ka5
        • 2.Qxa7#
      • 1...Kb6
        • 2.Qd8#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • K(a);P-FLIGHT,P_SPINP(c)::QAR2(C)
    • P(c);CHECK,OGATE::QAB1(C),XP(c)
    • P(c);OGATEB,SBLOCK::QAB(C)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Refutation
        • P(c);CHECK
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);CHECK::QAB1(C),XP(c)
        • K(a);P-FLIGHT::QAR2(C)
      • Refutation
        • P(c);
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);OGATEB,SBLOCK::QAB(C)
      • Refutation
        • P(c);CHECK
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);OGATEB,SBLOCK::QAB(C)
      • Refutation
        • P(c);CHECK
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • P(c);CHECK::QAB1(C),XP(c)
        • P(c);OGATEB,SBLOCK::QAB(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(a);P-FLIGHT::QAR2(C)
        • P(c);OGATEB,SBLOCK::QAB(C)
      • Refutation
        • P(c);CHECK
  • Actual
    • P(A);CHECK
    • Vars
      • K(a);P-FLIGHT::QAR2(C),XP(b)
      • K(a);P-FLIGHT,P_SPINP(c)::QAB(C)
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).