MESON Chess Problem Database

Problem Display
PID: 172400 (6r1/5Q2/7p/6n1/7k/6R1/6K1/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kuban segodniya, 1997

6r1/5Q2/7p/6n1/7k/6R1/6K1/8

#2

3 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...h5
      • 2.Qf4#
  • Tries
    • 1.Qxg8?
      • 1...Sf3
        • 2.Rh3#
        • 2.Qg4#
      • 1...Sh3
        • 2.Rxh3#
        • 2.Qg4#
      • 1...Se4
        • 2.Rh3#
        • 2.Qg4#
      • 1...Se6
        • 2.Rh3#
        • 2.Qg4#
      • 1...Sf7
        • 2.Rh3#
        • 2.Qg4#
      • 1...Sh7
        • 2.Rh3#
        • 2.Qg4#
      • 1...h5
        • 2.Qxg5#
      • 1...Kh5!
  • Keys
    • 1.Qf5!
      • threat
        • 2.Qg4#
      • 1...Kh5
        • 2.Rh3#
      • 1...Sf3
        • 2.Qh3#
      • 1...Sh3
        • 2.Qxh3#
      • 1...Se4
        • 2.Qh3#
      • 1...Se6
        • 2.Qh3#
      • 1...Sf7
        • 2.Qh3#
      • 1...Sh7
        • 2.Qh3#
      • 1...h5
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • P(c);SBLOCK::QAR2(C)
  • Tries
    • Try
      • Q(C);XR(d)
      • Vars
        • P(c);N_GUARD::QAB1(C),XS(b)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(C);
    • Threat
      • QAR1(C)
    • Vars
      • K(a);P-FLIGHT,P_SPINS(b)::R(B)
      • S(b);N_GUARD,P_PINR(B)::QAR1(C)
      • S(b);N_GUARD,P_PINR(B)::QAR1(C),XS(b)
      • P(c);SBLOCK::QAR2(C)
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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).