MESON Chess Problem Database

Problem Display
PID: 167085 (k1K5/PR6/qpQ5/8/8/8/8/8 w - - 0 1)

Chepizhni, Viktor Ivanovich

Comm., Nikolaev-200 JT, 1998

k1K5/PR6/qpQ5/8/8/8/8/8

#2

4 + 3

145 StrateGems 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Qf1
      • 2.Rc7#
      • 2.Rd7#
      • 2.Re7#
      • 2.Rf7#
      • 2.Rg7#
      • 2.Rh7#
    • 1...Qe2
      • 2.Rc7#
      • 2.Rd7#
      • 2.Re7#
      • 2.Rf7#
      • 2.Rg7#
      • 2.Rh7#
    • 1...Qd3
      • 2.Rc7#
      • 2.Rd7#
      • 2.Re7#
      • 2.Rf7#
      • 2.Rg7#
      • 2.Rh7#
    • 1...Qxb7+
      • 2.Qxb7#
    • 1...Qa1
      • 2.Rc7#
      • 2.Rd7#
      • 2.Re7#
      • 2.Rf7#
      • 2.Rg7#
      • 2.Rh7#
    • 1...Qa2
      • 2.Rc7#
      • 2.Rd7#
      • 2.Re7#
      • 2.Rf7#
      • 2.Rg7#
      • 2.Rh7#
    • 1...Qa3
      • 2.Rc7#
      • 2.Rd7#
      • 2.Re7#
      • 2.Rf7#
      • 2.Rg7#
      • 2.Rh7#
    • 1...Qa5
      • 2.Rc7#
      • 2.Rd7#
      • 2.Re7#
      • 2.Rf7#
      • 2.Rg7#
      • 2.Rh7#
    • 1...Qxa7
      • 2.Rb8#
  • Keys
    • 1.Qc7!
      • threat
        • 2.Qb8#
      • 1...Qxb7+
        • 2.Qxb7#
      • 1...Qxa7
        • 2.Rxa7#
      • 1...Qc4
        • 2.Rb8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • Q(a);CHECK,OGATE,P_SPINQ(a),XR(C)::QAB1(A),XQ(a)
    • Q(a);N_PINR(C),SBLOCK,XP(B)::QAB(A)+R(C),DCHECK
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • Q(a);CHECK,OGATE,XR(C)::QAB1(A),XQ(a)
      • Q(a);N_PINR(C),XP(B)::R1(C),XQ(a)
      • Q(a);N_PINR(C),P_PINQ(A)::R1(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).