MESON Chess Problem Database

Problem Display
PID: 231324 (5RrN/8/K4n1r/3B1k2/4R3/2pp1NP1/Q3n1P1/8 w - - 0 1)

Kriuckov, Sergey Petrovic

3rd HM., Tijdschrift vd NSB, 1927

5RrN/8/K4n1r/3B1k2/4R3/2pp1NP1/Q3n1P1/8

#2

9 + 7

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rg4
      • 2.Re5#
    • 1...Sc1
      • 2.Rf4#
    • 1...Sg1
      • 2.Rf4#
    • 1...Sd4
      • 2.Rf4#
    • 1...Sf4
      • 2.Rxf4#
  • Tries
    • 1.Bxg8?
      • threat
        • 2.Qd5#
        • 2.Qe6#
      • 1...Kxe4
        • 2.Qe6#
      • 1...Sf4
        • 2.Rxf4#
      • 1...Sd4
        • 2.Rf4#
        • 2.Qd5#
      • 1...Rxh8!
  • Keys
    • 1.Bf7!
      • threat
        • 2.Qe6#
      • 1...Sxe4+
        • 2.Be6#
      • 1...Sg4+
        • 2.Bg6#
      • 1...Sd5+
        • 2.Bg6#
      • 1...Sh5+
        • 2.Bg6#
      • 1...Sd7+
        • 2.Bg6#
      • 1...Sh7+
        • 2.Bg6#
      • 1...Se8+
        • 2.Bg6#
      • 1...Kxe4
        • 2.Qe6#
      • 1...Sf4
        • 2.Rxf4#
      • 1...Sd4
        • 2.Rf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 3
  • Sets
    • R(g);SBLOCK::R1(E)
    • S(a);N_GUARD::R1(E)
    • S(a);N_GUARD::R1(E),XS(a)
  • Tries
    • Try
      • B(F);XR(g)
      • Threat
        • DUALS(2)
      • Vars
        • K(d);N_SPINS(e),S_FLIGHT,XR(E)::QAR2(A)
        • S(a);N_GUARD::R1(E),XS(a)
      • Refutation
        • R(f);XS(I)
  • Actual
    • B(F);N_PINS(e)
    • Threat
      • QAB1(A)
    • Vars
      • S(e);CHECK,SBLOCK,XR(E)::R(H)+B(F),DCHECK
      • S(e);CHECK::R(H)+B(F),DCHECK
      • K(d);S_FLIGHT,XR(E)::QAR2(A)
      • S(a);N_GUARD::R1(E),XS(a)
      • S(a);N_GUARD::R1(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).