MESON Chess Problem Database

Problem Display
PID: 19119 (Q7/2p1n2b/8/1N2r2p/R7/4k2r/2pN1b2/2K2B2 w - - 0 1)

Harley, Brian

Reading Observer, 1912

(First published on Sat Jun 29 1912)

Q7/2p1n2b/8/1N2r2p/R7/4k2r/2pN1b2/2K2B2

#2

6 + 9

3360 Simple Two-move Themes 1924
15290 Harley Scrapbook 2014
56 The Problemist 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Rh1
      • 2.Qf3#
    • 1...Rh2
      • 2.Qf3#
    • 1...Rf3
      • 2.Qxf3#
    • 1...Rh4
      • 2.Qf3#
    • 1...Rf5
      • 2.Re4#
      • 2.Qe4#
    • 1...Bg3
      • 2.Qf3#
  • Tries
    • 1.Qa7+?
      • 1...Rc5
        • 2.Qxc5#
      • 1...c5!
  • Keys
    • 1.Qf8!
      • threat
        • 2.Qf4#
      • 1...Rf3
        • 2.Qxf3#
      • 1...Rh4
        • 2.Qf3#
      • 1...Re4
        • 2.Ra3#
      • 1...Rf5
        • 2.Re4#
      • 1...Bg3
        • 2.Qf3#
      • 1...Be4
        • 2.Sc4#
      • 1...Bf5
        • 2.Qh6#
      • 1...Sd5
        • 2.Qc5#
      • 1...Sf5
        • 2.Qa3#
      • 1...Sg6
        • 2.Ra3#
        • 2.Qa3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • R(d);N_GUARD,P_PINB(B)::QAR1(F)
    • R(d);N_GUARD::QAR1(F)
    • R(d);N_GUARD::QAR1(F),XR(d)
    • B(b);S_CUTR(d)::QAR1(F)
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • R(e);N_GUARD,P_SPINR(e)::QAB(F),XR(e)
      • Refutation
        • P(g);P_SPINP(g)
  • Actual
    • Q(F);
    • Threat
      • QAB1(F)
    • Vars
      • R(d);N_GUARD::QAR1(F),XR(d)
      • R(d);N_GUARD::QAR1(F)
      • R(e);S_CUTB(i)::R(D)
      • R(e);N_GUARD,S_CUTB(i)::R1(D)
      • B(b);S_CUTR(d)::QAR1(F)
      • B(i);SBLOCK::S(C)
      • B(i);S_CUTR(e)::QAB(F)
      • S(h);OGATE::QAB(F)
      • S(h);OGATE::QAR(F)
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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).