MESON Chess Problem Database

Problem Display
PID: 190174 (b2N4/q2p1Q2/r6p/r5kP/p3P3/6pK/8/8 w - - 0 1)

Windle, REL

The San Francisco Call, 1913

b2N4/q2p1Q2/r6p/r5kP/p3P3/6pK/8/8

#2

5 + 9

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rf5
      • 2.Qxf5#
    • 1...Bd5
      • 2.Qf5#
    • 1...d5
      • 2.Qf5#
    • 1...d6
      • 2.Se6#
  • Tries
    • 1.Qf4+?
      • 1...Kxh5
        • 2.Qg4#
      • 1...Kxf4!
  • Keys
    • 1.Qf3!
      • threat
        • 2.Sf7#
      • 1...Rf5
        • 2.Qxf5#
      • 1...Rf6
        • 2.Qg4#
      • 1...Bd5
        • 2.Qf5#
      • 1...d5
        • 2.Qf5#
      • 1...d6
        • 2.Se6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(c);N_GUARD::QAR1(D),XR(c)
    • B(i);S_CUTR(c)::QAR1(D)
    • P(h);S_CUTR(c)::QAR1(D)
    • P(h);N_GUARD,S_CUTR(e)::S(E)
  • Tries
    • Try
      • Q(D);CHECK
      • Vars
        • K(d);P-FLIGHT,XP(C)::QAB1(D)
      • Refutation
        • K(d);S_FLIGHT,XQ(D)
  • Actual
    • Q(D);
    • Threat
      • S(E)
    • Vars
      • R(c);N_GUARD::QAR1(D),XR(c)
      • R(e);SBLOCK::QAR1(D)
      • B(i);S_CUTR(c)::QAR1(D)
      • P(h);S_CUTR(c)::QAR1(D)
      • P(h);N_GUARD,S_CUTR(e)::S(E)
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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).