MESON Chess Problem Database

Problem Display
PID: 160644 (8/5Qpq/1rpN3p/1pk5/1N6/P3K2p/7B/6n1 w - - 0 1)

Rice, John Michael

British Chess Magazine, 2015

8/5Qpq/1rpN3p/1pk5/1N6/P3K2p/7B/6n1

#2

6 + 9

5454 Near Snap 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qd3+
      • 2.Sxd3#
    • 1...Qe4+
      • 2.Sxe4#
    • 1...Qf5
      • 2.Qxf5#
    • 1...Qg8
      • 2.Sd3#
      • 2.Se4#
    • 1...Qh8
      • 2.Sd3#
      • 2.Se4#
      • 2.Qf5#
    • 1...g6
      • 2.Sd3#
      • 2.Se4#
  • Tries
    • 1.Qh5+?
      • 1...Qf5
        • 2.Qxf5#
      • 1...g5!
  • Keys
    • 1.Qf2!
      • threat
        • 2.Kd2#
      • 1...Qd3+
        • 2.Kxd3#
      • 1...Qe4+
        • 2.Kxe4#
      • 1...Qc2
        • 2.Qxc2#
      • 1...Qf5
        • 2.Qxf5#
      • 1...Se2
        • 2.Kxe2#
      • 1...Sf3
        • 2.Kxf3#

Anticipated by 174159(1927)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(i);CHECK,N_GUARD::S(D),XQ(i)
    • Q(i);CHECK,N_GUARD::S(E),XQ(i)
    • Q(i);N_GUARD::QAR(F),XQ(i)
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • Q(i);N_GUARD,P_SPINQ(i)::QAR(F),XQ(i)
      • Refutation
        • P(h);P_SPINP(h)
  • Actual
    • Q(F);
    • Threat
      • QAB(F)+K(C)
    • Vars
      • Q(i);CHECK::QAB(F)+K(C),XQ(i)
      • Q(i);N_GUARD::QAR(F),XQ(i)
      • S(a);::QAB(F)+K(C),XS(a)
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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).