MESON Chess Problem Database

Problem Display
PID: 160027 (2Q5/k7/1rP5/1P6/3K4/8/8/6B1 w - - 0 1)

Andreev, Aleksandr Grigorevich

Bankovskaya gazeta, 1996

2Q5/k7/1rP5/1P6/3K4/8/8/6B1

#2

5 + 2

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Ra6
      • 2.Qb7#
    • 1...Rb7
      • 2.Qxb7#
    • 1...Rb8
      • 2.Qa6#
  • Tries
    • 1.Bh2?
      • 1...Rxc6
        • 2.Qb8#
      • 1...Ra6
        • 2.Qxa6#
        • 2.Qb7#
        • 2.Qb8#
      • 1...Rb7
        • 2.Qxb7#
      • 1...Rb8
        • 2.Qa6#
        • 2.Qxb8#
      • 1...Rxb5!
    • 1.Qa6+?
      • 1...Kb8
        • 2.Bh2#
      • 1...Rxa6!
    • 1.Qc7+?
      • 1...Rb7
        • 2.Qxb7#
      • 1...Ka8!
  • Keys
    • 1.Kc5!
      • 1...Rxb5+
        • 2.Kxb5#
      • 1...Rxc6+
        • 2.Kxc6#
      • 1...Rb8
        • 2.Qa6#
      • 1...Ra6
        • 2.Qb7#
      • 1...Rb7
        • 2.Qxb7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(a);N_GUARD::QAR1(E)
    • R(a);N_GUARD::QAR1(E),XR(a)
    • R(a);N_GUARD,SBLOCK::QAR1(E)
  • Tries
    • Try
      • B(A);
      • Vars
        • R(a);N_GUARD,XP(D)::QAB1(E)
        • R(a);N_GUARD::QAR1(E),XR(a)
      • Refutation
        • R(a);XP(C)
    • Try
      • Q(E);CHECK
      • Vars
        • K(b);S_FLIGHT::B(A)
      • Refutation
        • R(a);XQ(E)
    • Try
      • Q(E);CHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::QAR1(E),XR(a)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • K(B);S_FLIGHT
    • Vars
      • R(a);CHECK,XP(C)::B(A)+K(B),XR(a)
      • R(a);CHECK,XP(D)::B(A)+K(B),XR(a)
      • R(a);N_GUARD,SBLOCK::QAR1(E)
      • R(a);N_GUARD::QAR1(E)
      • R(a);N_GUARD::QAR1(E),XR(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).