MESON Chess Problem Database

Problem Display
PID: 161609 (4r3/5k1K/4RpN1/8/8/8/8/2Q5 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kuban segodniya, 1996

4r3/5k1K/4RpN1/8/8/8/8/2Q5

#2

4 + 3

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Re7
      • 2.Rxe7#
    • 1...Ra8
      • 2.Re7#
    • 1...Rb8
      • 2.Re7#
    • 1...Rc8
      • 2.Re7#
    • 1...Rd8
      • 2.Re7#
    • 1...Rf8
      • 2.Re7#
    • 1...Rg8
      • 2.Re7#
  • Tries
    • 1.Qc7+?
      • 1...Re7
        • 2.Rxe7#
        • 2.Qxe7#
      • 1...Kxe6!
  • Keys
    • 1.Qc8!
      • threat
        • 2.Qxe8#
      • 1...Rh8+
        • 2.Sxh8#
      • 1...Rxe6
        • 2.Qf8#
        • 2.Qg8#
      • 1...Rxc8
        • 2.Re7#
      • 1...Re7
        • 2.Sh8#
        • 2.Rxe7#
        • 2.Qg8#
      • 1...Rd8
        • 2.Re7#
      • 1...Rf8
        • 2.Re7#
        • 2.Qd7#
      • 1...Rg8
        • 2.Re7#
        • 2.Qd7#
        • 2.Qxg8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • R(c);N_GUARD::R1(B),XR(c)
    • R(c);N_GUARD::R1(B)
  • Tries
    • Try
      • Q(A);CHECK
      • Refutation
        • K(b);S_FLIGHT,XR(B)
  • Actual
    • Q(A);
    • Threat
      • QAB1(A),XR(c)
    • Vars
      • R(c);CHECK,N_GUARD::S(C),XR(c)
      • R(c);N_GUARD,XQ(A)::R1(B)
      • R(c);N_GUARD::R1(B)
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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).