MESON Chess Problem Database

Problem Display
PID: 172217 (Q7/n7/8/3N4/pp6/k7/8/1K6 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kuban segodniya, 1996

Q7/n7/8/3N4/pp6/k7/8/1K6

#2

3 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...b3
      • 2.Qf8#
  • Tries
    • 1.Qxa7?
      • 1...b3
        • 2.Qc5#
        • 2.Qe7#
      • 1...Kb3!
    • 1.Qf8?
      • threat
        • 2.Qxb4#
      • 1...Kb3
        • 2.Qxb4#
      • 1...Sc6!
  • Keys
    • 1.Sb6!
      • 1...Kb3
        • 2.Qf3#
      • 1...Sb5
        • 2.Qxa4#
      • 1...Sc6
        • 2.Qxa4#
      • 1...Sc8
        • 2.Qxa4#
      • 1...b3
        • 2.Qf8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(c);OGATEB,SBLOCK::QAB(C)
  • Tries
    • Try
      • Q(C);P_PINP(b),XS(d)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • Q(C);P_PINP(c)
      • Threat
        • QAB1(C),XP(c)
      • Vars
        • K(a);N_SPINP(c),P-FLIGHT::QAR1(C),XP(c)
      • Refutation
        • S(d);
  • Actual
    • S(B);
    • Vars
      • K(a);P-FLIGHT::QAR(C)
      • S(d);OGATE,P_SPINP(b)::QAR1(C),XP(b)
      • P(c);OGATEB,SBLOCK::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).