MESON Chess Problem Database

Problem Display
PID: 129837 (1rBkq2R/1p2p3/8/8/7B/2QK4/8/8 w - - 0 1)

Martin, Godefroy Jose

Ruch, 1947

1rBkq2R/1p2p3/8/8/7B/2QK4/8/8

#2

5 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qf8
      • 2.Rxf8#
    • 1...Qg8
      • 2.Rxg8#
  • Tries
    • 1.Qc5?
      • threat
        • 2.Bxe7#
      • 1...Rxc8
        • 2.Qd6#
        • 2.Qxe7#
      • 1...Qf8
        • 2.Rxf8#
      • 1...Qg8
        • 2.Rxg8#
      • 1...Qxh8!
    • 1.Qc6?
      • threat
        • 2.Rxe8#
        • 2.Qd7#
      • 1...Qxh8
        • 2.Qd7#
      • 1...Rxc8
        • 2.Rxe8#
        • 2.Qd6#
      • 1...Qf8
        • 2.Rxf8#
        • 2.Qd7#
      • 1...Qg8
        • 2.Rxg8#
        • 2.Qd7#
      • 1...bxc6!
  • Keys
    • 1.Bg3!
      • threat
        • 2.Qc7#
      • 1...Qxh8
        • 2.Qxh8#
      • 1...Rxc8
        • 2.Qd4#
      • 1...Qf8
        • 2.Rxf8#
      • 1...Qg8
        • 2.Rxg8#
      • 1...e5
        • 2.Bh4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(e);OGATEB::R(E),XQ(e)
  • Tries
    • Try
      • Q(A);
      • Threat
        • B(C),XP(b)
      • Vars
        • Q(e);OGATEB::R(E),XQ(e)
      • Refutation
        • Q(e);N_SPINQ(e),XR(E)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • Q(e);N_SPINQ(e),XR(E)::QAR1(A)
      • Refutation
        • P(a);XQ(A)
  • Actual
    • B(C);N_PINP(b)
    • Threat
      • QAB1(A)
    • Vars
      • Q(e);N_SPINQ(e),OGATE,XR(E)::QAR(A),XQ(e)
      • R(c);SBLOCK,XB(D)::QAR(A)
      • Q(e);OGATEB::R(E),XQ(e)
      • P(b);OGATEB::B(C)
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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).