MESON Chess Problem Database

Problem Display
PID: 186755 (4nNbb/p1P5/2P5/3kr3/2R1NBP1/1K1P1p2/8/3R4 w - - 0 1)

Shanshin, Valery Yurevich

Troll, 2018

4nNbb/p1P5/2P5/3kr3/2R1NBP1/1K1P1p2/8/3R4

#2

10 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe4
      • 2.dxe4#
    • 1...Sd6
      • 2.Sc3#
  • Tries
    • 1.Ra1?
      • threat
        • 2.Ra5#
      • 1...Sd6
        • 2.Sc3#
      • 1...a5
        • 2.Rxa5#
      • 1...Sxc7!
    • 1.c8S?
      • threat
        • 2.Sc3#
      • 1...Rxe4
        • 2.dxe4#
      • 1...Rf5
        • 2.Se7#
      • 1...Rg5
        • 2.Se7#
      • 1...Rh5
        • 2.Se7#
      • 1...Re7
        • 2.Sxe7#
      • 1...Re6!
  • Keys
    • 1.d4!
      • threat
        • 2.dxe5#
      • 1...Kxe4
        • 2.d5#
      • 1...Rxe4
        • 2.Rc5#
      • 1...Rf5
        • 2.Sc3#
      • 1...Rg5
        • 2.Sc3#
      • 1...Rh5
        • 2.Sc3#
      • 1...Re6
        • 2.Sc3#
      • 1...Re7
        • 2.Sc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • R(c);OGATE,XS(E)::R(A)+P(C)DCHECK,XR(c)
    • S(e);SBLOCK::S(E)
  • Tries
    • Try
      • R(A);
      • Threat
        • R(A)
      • Vars
        • S(e);SBLOCK::S(E)
        • P(d);::R(A),XP(d)
      • Refutation
        • S(e);XP(I)
    • Try
      • P(I);
      • Threat
        • S(E)
      • Vars
        • R(c);OGATE,XS(E)::R(A)+P(C)DCHECK,XR(c)
        • R(c);N_GUARD::S(I)
        • R(c);N_GUARD::S(I),XR(c)
      • Refutation
        • R(c);
  • Actual
    • P(C);
    • Threat
      • R(A)+P(C),XR(c)
    • Vars
      • K(b);OGATE,P_PINR(D),S_FLIGHT,XS(E)::R(D)+P(C)
      • R(c);SBLOCK,XS(E)::R1(D)
      • R(c);::S(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).