MESON Chess Problem Database

Problem Display
PID: 172369 (2K1k3/3r2R1/4NP2/8/5Q2/8/8/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Bankovskaya gazeta, 1997

2K1k3/3r2R1/4NP2/8/5Q2/8/8/8

#2

5 + 2

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rd1
      • 2.Re7#
    • 1...Rd2
      • 2.Re7#
    • 1...Rd3
      • 2.Re7#
    • 1...Rd4
      • 2.Re7#
    • 1...Rd5
      • 2.Re7#
    • 1...Rd6
      • 2.Re7#
    • 1...Re7
      • 2.Rxe7#
  • Tries
    • 1.f7+?
      • 1...Rxf7
        • 2.Qxf7#
      • 1...Ke7!
  • Keys
    • 1.Qd6!
      • threat
        • 2.Qf8#
        • 2.Qxd7#
      • 1...Rc7+
        • 2.Sxc7#
      • 1...Rd8+
        • 2.Qxd8#
      • 1...Rxd6
        • 2.Re7#
      • 1...Rxg7
        • 2.Qf8#
      • 1...Ra7
        • 2.Qf8#
        • 2.Qd8#
      • 1...Rb7
        • 2.Qf8#
        • 2.Qd8#
      • 1...Re7
        • 2.Rxe7#
        • 2.Qxe7#
        • 2.Qd8#
      • 1...Rf7
        • 2.Qd8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • R(a);N_GUARD::R1(D)
    • R(a);N_GUARD::R1(D),XR(a)
  • Tries
    • Try
      • P(C);CHECK
      • Vars
        • R(a);OGATE,XP(C)::QAB1(A),XR(a)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(A);
    • Threat
      • DUALS(2)
    • Vars
      • R(a);CHECK,N_GUARD::S(B),XR(a)
      • R(a);CHECK,OGATE::QAR1(A),XR(a)
      • R(a);N_GUARD,XQ(A)::R1(D)
      • R(a);XR(D)::QAR1(A)
      • R(a);OGATE::QAR1(A)
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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).