MESON Chess Problem Database

Problem Display
PID: 228258 (B7/1rpp4/4R2B/4p2k/Q2p3p/1r1P3P/1p1P4/1K6 w - - 0 1)

Howard, David M

Ling, John Francis

Problem Observer, 2019

B7/1rpp4/4R2B/4p2k/Q2p3p/1r1P3P/1p1P4/1K6

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Ra3
      • 2.Qd1#
    • 1...Rc3
      • 2.Qd1#
    • 1...R3b4
      • 2.Qd1#
    • 1...R3b5
      • 2.Qd1#
    • 1...R3b6
      • 2.Qd1#
    • 1...R7b4
      • 2.Bf3#
    • 1...R7b5
      • 2.Bf3#
    • 1...R7b6
      • 2.Bf3#
    • 1...Ra7
      • 2.Bf3#
    • 1...Rb8
      • 2.Bf3#
    • 1...d5
      • 2.Qe8#
    • 1...d6
      • 2.Qe8#
  • Tries
    • 1.Bf4?
      • threat
        • 2.Rh6#
      • 1...dxe6
        • 2.Qe8#
      • 1...R3b6
        • 2.Qd1#
      • 1...R7b6
        • 2.Bf3#
      • 1...exf4!
    • 1.Qxb3?
      • threat
        • 2.Qd1#
      • 1...Rxb3
        • 2.Bf3#
      • 1...dxe6!
  • Keys
    • 1.Be3!
      • threat
        • 2.Rh6#
      • 1...dxe3
        • 2.Qg4#
      • 1...dxe6
        • 2.Qe8#
      • 1...R3b6
        • 2.Qd1#
      • 1...R7b6
        • 2.Bf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 10
  • Sets
    • R(b);OGATE::QAB(E)
    • R(g);OGATE::B(H)
    • P(i);OGATE::QAB(E)
  • Tries
    • Try
      • B(G);
      • Threat
        • R1(F)
      • Vars
        • P(i);OGATE,XR(F)::QAB(E)
        • R(b);OGATE::QAB(E)
        • R(g);OGATE::B(H)
      • Refutation
        • P(e);XB(G)
    • Try
      • Q(E);XR(b)
      • Threat
        • QAB(E)
      • Vars
        • R(g);OGATE,XQ(E)::B(H)
      • Refutation
        • P(i);XR(F)
  • Actual
    • B(G);
    • Threat
      • R1(F)
    • Vars
      • P(c);OGATE,XB(G)::QAB1(E)
      • P(i);OGATE,XR(F)::QAB(E)
      • R(b);OGATE::QAB(E)
      • R(g);OGATE::B(H)
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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).