MESON Chess Problem Database

Problem Display
PID: 234897 (1QNr1r2/2p1p1N1/RB1P1kPP/1R4pp/8/6P1/4n3/KB6 w - - 0 1)

Haring, Jacobus

Revista Romana de Sah, 1958

1QNr1r2/2p1p1N1/RB1P1kPP/1R4pp/8/6P1/4n3/KB6

#2

12 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...e6
      • 2.Sxh5#
  • Tries
    • 1.Bd4+?
      • 1...e5
        • 2.Bxe5#
      • 1...Sxd4!
    • 1.dxe7?
      • threat
        • 2.Bd4#
      • 1...cxb6
        • 2.Qe5#
      • 1...Rd4
        • 2.Bxd4#
        • 2.exf8Q#
        • 2.exf8R#
      • 1...Rd6
        • 2.exf8Q#
        • 2.exf8R#
      • 1...Sd4
        • 2.Bxd4#
      • 1...c5
        • 2.Bxd8#
      • 1...c6
        • 2.Qe5#
      • 1...Rxc8!
  • Keys
    • 1.d7!
      • threat
        • 2.Bd4#
      • 1...cxb6
        • 2.Qe5#
      • 1...Sd4
        • 2.Bxd4#
      • 1...c5
        • 2.Bxd8#
      • 1...c6
        • 2.Qe5#
      • 1...e5
        • 2.Bxc7#
      • 1...e6
        • 2.Sxh5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • P(f);SBLOCK::S(J),XP(c)
  • Tries
    • Try
      • B(F);CHECK
      • Vars
        • P(f);P_SPINP(f)::B(F),XP(f)
      • Refutation
        • S(a);XB(F)
    • Try
      • P(G);XP(f)
      • Threat
        • R(E)+B(F),DCHECK
      • Vars
        • P(e);OGATE,P_SPINP(e),XB(F)::QAB1(K)
        • R(g);N_GUARD::PXR(h)=Q
        • S(a);::R(E)+B(F),DCHECK,XS(a)
        • P(e);OGATE::R(E)+B(F),XR(g)
        • P(e);OGATE::QAB1(K)
      • Refutation
        • R(g);XS(L)
  • Actual
    • P(G);
    • Threat
      • R(E)+B(F),DCHECK
    • Vars
      • P(e);OGATE,P_SPINP(e),XB(F)::QAB1(K)
      • S(a);::R(E)+B(F),DCHECK,XS(a)
      • P(e);OGATE::R(E)+B(F),XR(g)
      • P(e);OGATE::QAB1(K)
      • P(f);N_GUARD::R(E)+B(F),XP(e)
      • P(f);SBLOCK::S(J),XP(c)
HTML5 logo

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).