MESON Chess Problem Database

Problem Display
PID: 234017 (1QRr4/2pp4/4P3/1NPr4/2k5/PpP4R/n2P2B1/7K w - - 0 1)

Hermanson, Halvar

2nd Comm., Il Due Mosse 16. TT, 1962

1QRr4/2pp4/4P3/1NPr4/2k5/PpP4R/n2P2B1/7K

#2

11 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc5
      • 2.Rxc7#
    • 1...Rxc5
      • 2.d3#
    • 1...Sxc3
      • 2.Rxc3#
  • Tries
    • 1.Bf1+?
      • 1...Kxc5
        • 2.Rxc7#
        • 2.Qxc7#
      • 1...Rd3!
    • 1.d3+?
      • 1...Kxc5
        • 2.Rxc7#
      • 1...Rxd3!
  • Keys
    • 1.Sxc7!
      • threat
        • 2.Qb5#
      • 1...Kxc5
        • 2.Sa6#
      • 1...Rxc5
        • 2.Bf1#
      • 1...Sxc3
        • 2.Qb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(c);OGATEB,P-FLIGHT,P_SPINP(e),XP(H)::R(K),XP(e)
    • R(d);N_GUARD,SBLOCK,XP(H)::P(B)
    • S(a);OGATE,XP(E)::R1(F),XS(a)
  • Tries
    • Try
      • B(C);CHECK
      • Refutation
        • R(d);P_SPINR(d)
    • Try
      • P(B);CHECK
      • Vars
        • K(c);P-FLIGHT,P_SPINP(e),XP(H)::R(K),XP(e)
      • Refutation
        • R(d);XP(B)
  • Actual
    • S(G);XP(e)
    • Threat
      • QAB1(J)
    • Vars
      • K(c);P-FLIGHT,XP(H)::R(K)+S(G),DCHECK
      • R(d);N_GUARD,SBLOCK,XP(H)::B(C)
      • S(a);N_GUARD,XP(E)::QAR1(J)
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).