MESON Chess Problem Database

Problem Display
PID: 248146 (8/2kP1Q1R/4nK2/1p1p4/8/7B/8/8 w - - 0 1)

Tkachenko, Sergiy Ivanovich

StrateGems, 2021

8/2kP1Q1R/4nK2/1p1p4/8/7B/8/8

#2

5 + 4

SOLUTION

  • SOUND
  • Tries
    • 1.d8Q+?
      • 1...Kxd8
        • 2.Qd7#
      • 1...Kc6!
  • Keys
    • 1.d8S+!
      • 1...Kb6
        • 2.Qa7#
      • 1...Kd6
        • 2.Qe7#
      • 1...Kb8
        • 2.Qb7#
      • 1...Kc8
        • 2.Qc7#
      • 1...Kxd8
        • 2.Qd7#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • P(C);CHECK
      • Vars
        • K(d);S_FLIGHT,XQ(C)::QAR1(D)
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • P(C);CHECK
    • Vars
      • K(d);OGATE,S_FLIGHT::QAB1(D)
      • K(d);S_FLIGHT::QAB1(D)
      • K(d);OGATE,S_FLIGHT::QAR1(D)
      • K(d);P-FLIGHT,P_SPINS(c)::QAR1(D)
      • K(d);S_FLIGHT,XS(C)::QAR1(D)
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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).