MESON Chess Problem Database

Problem Display
PID: 172522 (4r3/1KPk1P2/3P4/8/8/2Q5/8/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kuban segodniya, 2002

4r3/1KPk1P2/3P4/8/8/2Q5/8/8

#2

5 + 2

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Re6
      • 2.Qc6#
  • Tries
    • 1.c8Q+?
      • 1...Kxd6
        • 2.Q3c5#
      • 1...Rxc8!
    • 1.fxe8Q+?
      • 1...Kxd6
        • 2.Qd4#
        • 2.Qce5#
        • 2.Qcc6#
      • 1...Kxe8!
    • 1.fxe8R?
      • threat
        • 2.Qc6#
      • 1...Kxd6
        • 2.Qd4#
        • 2.Qc6#
      • 1...Kxe8!
  • Keys
    • 1.Qf6!
      • 1...Rb8+
        • 2.cxb8S#
      • 1...Re6
        • 2.Qd8#
      • 1...Re1
        • 2.c8Q#
        • 2.c8B#
      • 1...Re2
        • 2.c8Q#
        • 2.c8B#
      • 1...Re3
        • 2.c8Q#
        • 2.c8B#
      • 1...Re4
        • 2.c8Q#
        • 2.c8B#
      • 1...Re5
        • 2.c8Q#
        • 2.c8B#
      • 1...Re7
        • 2.Qxe7#
        • 2.c8Q#
      • 1...Ra8
        • 2.Qe7#
      • 1...Rc8
        • 2.Qe7#
      • 1...Rd8
        • 2.Qe7#
        • 2.cxd8Q#
        • 2.cxd8R#
      • 1...Rf8
        • 2.Qe7#
      • 1...Rg8
        • 2.Qe7#
      • 1...Rh8
        • 2.Qe7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • R(b);SBLOCK::QAB1(A)
  • Tries
    • Try
      • P(D);CHECK
      • Vars
        • K(a);P-FLIGHT,XP(B)::QAB1(A)
      • Refutation
        • R(b);XQ(D)
    • Try
      • P(E);CHECK,XR(b)
      • Refutation
        • K(a);S_FLIGHT,XQ(E)
    • Try
      • P(E);XR(b)
      • Threat
        • QAB1(A)
      • Refutation
        • K(a);S_FLIGHT,XR(E)
  • Actual
    • Q(A);
    • Vars
      • R(b);CHECK,OGATE::PXR(b)=S
      • R(b);N_GUARD,SBLOCK::QAR1(A)
      • R(b);N_GUARD::P=Q
      • R(b);N_GUARD::QAR1(A)
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).