MESON Chess Problem Database

Problem Display
PID: 108402 (5R2/3K1pk1/6p1/2p2P2/Q3P3/8/8/6R1 w - - 0 1)

Hartong, Jan

Servais MT, 1971

5R2/3K1pk1/6p1/2p2P2/Q3P3/8/8/6R1

#2

6 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kf6
      • 2.Qa1#
  • Tries
    • 1.Qa1+?
      • 1...Kh6
        • 2.Rh8#
        • 2.Qh8#
      • 1...Kh7
        • 2.Rh1#
        • 2.Rh8#
        • 2.Qh8#
      • 1...Kxf8
        • 2.Qh8#
      • 1...f6!
  • Keys
    • 1.f6+!
      • 1...Kxf6
        • 2.Qa1#
      • 1...Kh6
        • 2.Rh8#
      • 1...Kh7
        • 2.Rh1#
      • 1...Kxf8
        • 2.Qa8#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(d);N_SPINP(b),P_SPINP(c),S_FLIGHT::QAB(B)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(d);N_SPINP(b),OGATE,S_FLIGHT,XR(F)::QAR2(B)
      • Refutation
        • P(c);N_SPINP(b),P_SPINP(c)
  • Actual
    • P(D);CHECK
    • Vars
      • K(d);N_SPINP(b),P_SPINP(c),S_FLIGHT,XP(D)::QAB(B)
      • K(d);N_SPINP(b),S_FLIGHT::R(F)
      • K(d);N_SPINP(b),P-FLIGHT::R(A)
      • K(d);N_SPINP(b),S_FLIGHT,XR(F)::QAR(B)
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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).