MESON Chess Problem Database

Problem Display
PID: 119410 (kB6/1p6/N7/2P5/8/1p6/8/1K5Q w - - 0 1)

Fomichev, Evgeny Vasilevich

Sachove umeni (Ceskoslovensky sach), 1988

kB6/1p6/N7/2P5/8/1p6/8/1K5Q

#2

5 + 3

6490 yacpdb 2009
5454 Near Snap 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Qh7?
      • 1...bxa6
        • 2.Qa7#
      • 1...b5
        • 2.Qe4#
        • 2.Qh1#
        • 2.Qa7#
      • 1...b6
        • 2.Qe4#
        • 2.Qh1#
        • 2.Qa7#
      • 1...b2!
    • 1.Qh8?
      • threat
        • 2.Sc7#
      • 1...b5
        • 2.Qh1#
      • 1...b6
        • 2.Qh1#
      • 1...bxa6!
  • Keys
    • 1.c6!
      • threat
        • 2.cxb7#
      • 1...bxa6
        • 2.c7#
      • 1...bxc6
        • 2.Qxc6#
      • 1...b5
        • 2.c7#
      • 1...b6
        • 2.c7#

This anticipates 225443(1997)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);N_PINP(b)
      • Vars
        • P(b);OGATE,XS(D)::QAR1(B)
      • Refutation
        • P(a);
    • Try
      • Q(B);N_PINP(b)
      • Threat
        • S(D)
      • Vars
        • P(b);OGATEB::QAB(B)
      • Refutation
        • P(b);XS(D)
  • Actual
    • P(C);N_PINP(b)
    • Threat
      • P(C),XP(b)
    • Vars
      • P(b);XS(D)::QAB(B)+P(C)
      • P(b);OGATE,P_SPINP(b),XP(C)::QAB(B),XP(b)
      • P(b);::QAB(B)+P(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).