MESON Chess Problem Database

Problem Display
PID: 270560 (6Q1/BK4P1/2RppPR1/1n2k3/4p1P1/2p1P3/8/8 w - - 0 1)

Degener, Udo

64 Shakhmatnoe obozrenie, 2023

6Q1/BK4P1/2RppPR1/1n2k3/4p1P1/2p1P3/8/8

#2

9 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Rg5#
    • 1...d5
      • 2.Rxe6#
      • 2.Qxe6#
  • Tries
    • 1.Bd4+?
      • 1...Kd5
        • 2.Rg5#
      • 1...Sxd4!
    • 1.Bb8?
      • threat
        • 2.Rc5#
      • 1...Kd5
        • 2.Rg5#
      • 1...Sc7!
    • 1.Qf7?
      • threat
        • 2.Rg5#
      • 1...Kd5
        • 2.Rg5#
      • 1...Sd4!
    • 1.Qf8?
      • threat
        • 2.Rg5#
      • 1...Sd4
        • 2.Qxd6#
      • 1...Kd5!
  • Keys
    • 1.Qd8!
      • threat
        • 2.Rg5#
      • 1...Kd5
        • 2.Rc5#
      • 1...Sd4
        • 2.Qxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(d);N_GUARD,P-FLIGHT,P_SPINP(f)::R(E)
  • Tries
    • Try
      • B(F);CHECK
      • Vars
        • K(d);P-FLIGHT,P_SPINP(f)::R(E)
      • Refutation
        • S(c);XB(F)
    • Try
      • B(F);P_PINP(e)
      • Threat
        • R(C)
      • Vars
        • K(d);N_GUARD,N_SPINP(e),P-FLIGHT,P_SPINP(f)::R(E)
      • Refutation
        • S(c);N_SPINP(e)
    • Try
      • Q(I);
      • Threat
        • R(E)
      • Vars
        • K(d);P-FLIGHT,P_SPINP(f)::R(E)
      • Refutation
        • S(c);
    • Try
      • Q(I);
      • Threat
        • R(E)
      • Vars
        • S(c);N_GUARD::QAB1(I),XP(e)
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • Q(I);
    • Threat
      • R(E)
    • Vars
      • K(d);P-FLIGHT,P_SPINP(e)::R1(C)
      • S(c);N_GUARD::QAB1(I),XP(e)
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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).