MESON Chess Problem Database

Problem Display
PID: 97946 (2QRr3/7B/b2p4/3P2r1/1KNkN3/8/2PP3B/8 w - - 0 1)

Hermanson, Halvar

1st Comm., Problemas, 1973

2QRr3/7B/b2p4/3P2r1/1KNkN3/8/2PP3B/8

#2

10 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd5
      • 2.Rxd6#
    • 1...Rxd5
      • 2.Bg1#
    • 1...Bxc4
      • 2.Qxc4#
  • Tries
    • 1.Scxd6?
      • threat
        • 2.Qc5#
      • 1...Kxd5
        • 2.Sxe8#
      • 1...Rxd5
        • 2.Qc3#
      • 1...Bxc8
        • 2.Sb5#
      • 1...Rg3!
    • 1.Bg1+?
      • 1...Kxd5
        • 2.Sc3#
        • 2.Sf6#
        • 2.Rxd6#
      • 1...Rxg1!
    • 1.c3+?
      • 1...Kxd5
        • 2.Se3#
        • 2.Sb6#
        • 2.Sf6#
        • 2.Rxd6#
      • 1...Kd3!
  • Keys
    • 1.Sexd6!
      • threat
        • 2.Qc5#
      • 1...Kxd5
        • 2.Sxe8#
      • 1...Rxd5
        • 2.c3#
      • 1...Bxc8
        • 2.Sb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(a);OGATEB,P-FLIGHT,P_SPINP(d),XP(G)::R1(J),XP(d)
    • R(b);N_GUARD,SBLOCK,XP(G)::B(C)
    • B(c);OGATE,XS(E)::QAR1(I),XB(c)
  • Tries
    • Try
      • S(E);XP(d)
      • Threat
        • QAB1(I)
      • Vars
        • K(a);P-FLIGHT,XP(G)::R(J)+S(E),XR(e)
        • R(b);SBLOCK,XP(G)::QAB1(I)
        • B(c);N_GUARD,XQ(I)::S(E)
      • Refutation
        • R(b);
    • Try
      • B(C);CHECK
      • Refutation
        • R(b);XB(C)
    • Try
      • P(A);CHECK
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • S(F);XP(d)
    • Threat
      • QAB1(I)
    • Vars
      • K(a);P-FLIGHT,XP(G)::R(J)+S(F),XR(e)
      • R(b);SBLOCK,XP(G)::P(A)
      • B(c);N_GUARD,XQ(I)::S(F)
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).