MESON Chess Problem Database

Problem Display
PID: 109161 (8/7p/7p/5Q2/7k/5P2/5nK1/8 w - - 0 1)

Petkov, Petko Andonov

South African Chess Player, 1962

8/7p/7p/5Q2/7k/5P2/5nK1/8

#2

3 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sd1
      • 2.Qg4#
    • 1...Sh1
      • 2.Qg4#
    • 1...Sd3
      • 2.Qg4#
    • 1...Sh3
      • 2.Qg4#
    • 1...Se4
      • 2.Qg4#
    • 1...Sg4
      • 2.Qxg4#
    • 1...h5
      • 2.Qf6#
  • Tries
    • 1.Qg6?
      • threat
        • 2.Qxh6#
      • 1...h5
        • 2.Qg3#
        • 2.Qf6#
      • 1...Sg4
        • 2.Qxg4#
      • 1...hxg6!
    • 1.Qf4+?
      • 1...Sg4
        • 2.Qxg4#
      • 1...Kh5!
    • 1.f4?
      • 1...Sd1
        • 2.Qh3#
      • 1...Sh1
        • 2.Qh3#
      • 1...Sd3
        • 2.Qh3#
      • 1...Sh3
        • 2.Qxh3#
      • 1...Se4
        • 2.Qh3#
      • 1...h5
        • 2.Qg5#
      • 1...Sg4!
  • Keys
    • 1.Kh2!
      • 1...Sg4+
        • 2.Qxg4#
      • 1...h5
        • 2.Qf6#
      • 1...Sd1
        • 2.Qg4#
      • 1...Sh1
        • 2.Qg4#
      • 1...Sd3
        • 2.Qg4#
      • 1...Sh3
        • 2.Qg4#
      • 1...Se4
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAR1(C)
    • S(a);N_GUARD::QAR1(C),XS(a)
    • P(c);SBLOCK::QAB(C)
  • Tries
    • Try
      • Q(C);
      • Threat
        • QAR2(C),XP(c)
      • Vars
        • S(a);N_GUARD::QAR1(C),XS(a)
      • Refutation
        • P(d);XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAR1(C),XS(a)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • P(B);
      • Vars
        • S(a);N_GUARD::QAR1(C)
        • S(a);N_GUARD::QAR1(C),XS(a)
        • P(c);N_GUARD::QAB1(C)
      • Refutation
        • S(a);
  • Actual
    • K(A);P-FLIGHT
    • Vars
      • S(a);CHECK,N_GUARD::QAR1(C),XS(a)
      • P(c);SBLOCK::QAB(C)
      • S(a);N_GUARD::QAR1(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).