MESON Chess Problem Database

Problem Display
PID: 79446 (5Q2/8/2K5/4p1p1/5qR1/1B3k1P/3R1pN1/8 w - - 0 1)

Rice, John Michael

BCSC Starter, 2001-2002

5Q2/8/2K5/4p1p1/5qR1/1B3k1P/3R1pN1/8

#2

7 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Bd5#
    • 1...Qf5
      • 2.Bd1#
      • 2.Qxf5#
    • 1...Qf6+
      • 2.Qxf6#
    • 1...Qf7
      • 2.Bd1#
      • 2.Qxf7#
    • 1...Qxf8
      • 2.Bd1#
    • 1...e4
      • 2.Bd1#
  • Tries
    • 1.Rg3+?
      • 1...Ke4
        • 2.Bc2#
        • 2.Bd5#
      • 1...Kxg3!
    • 1.Qxf4+?
      • 1...exf4
        • 2.Bd5#
      • 1...gxf4!
  • Keys
    • 1.Qa3!
      • threat
        • 2.Bd5#
      • 1...Qa4+
        • 2.Bxa4#
      • 1...Qc4+
        • 2.Bxc4#
      • 1...Qf6+
        • 2.Be6#
      • 1...Ke4
        • 2.Bc2#
      • 1...Qxd2
        • 2.Bd1#
      • 1...Qe3
        • 2.Bd1#
      • 1...e4
        • 2.Bd1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • K(b);S_FLIGHT::B(C)
    • Q(c);CHECK,OGATEB::QAR(G),XQ(c)
    • Q(c);N_SPINQ(c),XQ(G)::B(C)
    • P(d);SBLOCK::B(C)
  • Tries
    • Try
      • R(E);CHECK
      • Refutation
        • K(b);N_SPINQ(c),P-FLIGHT,XR(E)
    • Try
      • Q(G);CHECK,XQ(c)
      • Vars
        • P(d);XQ(G)::B(C)
      • Refutation
        • P(e);XQ(G)
  • Actual
    • Q(G);N_PINQ(c)
    • Threat
      • QAR(G)+B(C),DCHECK
    • Vars
      • Q(c);CHECK,N_GUARD::QAR(G)+B(C),XQ(c)
      • Q(c);CHECK,N_GUARD::QAR(G)+B(C)
      • K(b);P_SPINQ(c),S_FLIGHT::B(C)
      • Q(c);XR(A)::QAR(G)+B(C),DCHECK
      • Q(c);::B(C)
      • P(d);SBLOCK::QAR(G)+B(C),DCHECK
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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).