MESON Chess Problem Database

Problem Display
PID: 200024 (8/p2p2pB/R5N1/2p5/2p1k1P1/2Pp2B1/3P4/4K1R1 w - - 0 1)

Hjelle, David

Stella Polaris, 1966

8/p2p2pB/R5N1/2p5/2p1k1P1/2Pp2B1/3P4/4K1R1

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Kf3
      • 2.Se5#
    • 1...Kd5
      • 2.Se7#
  • Tries
    • 1.Kf2?
      • 1...Kd5
        • 2.Se7#
      • 1...d5
        • 2.Re1#
        • 2.Re6#
      • 1...d6!
    • 1.Sh4+?
      • 1...Kd5
        • 2.Rd6#
      • 1...g6!
    • 1.Rf1?
      • 1...Kd5
        • 2.Se7#
      • 1...d5
        • 2.Rf4#
        • 2.Re6#
      • 1...d6!
    • 1.Re6+?
      • 1...Kf3
        • 2.Se5#
      • 1...Kd5
        • 2.Sf4#
      • 1...dxe6!
  • Keys
    • 1.Bd6!
      • 1...Kf3
        • 2.Sh4#
      • 1...Kd5
        • 2.Sf4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(c);S_FLIGHT::S(H)
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Vars
        • K(c);S_FLIGHT::S(H)
      • Refutation
        • P(f);
    • Try
      • S(H);CHECK
      • Vars
        • K(c);S_FLIGHT::R1(G)
      • Refutation
        • P(g);P_SPINP(g)
    • Try
      • R(B);
      • Vars
        • K(c);S_FLIGHT::S(H)
      • Refutation
        • P(f);
    • Try
      • R(G);CHECK
      • Vars
        • K(c);S_FLIGHT::S(H)
      • Refutation
        • P(f);XR(G)
  • Actual
    • B(E);
    • Vars
      • K(c);S_FLIGHT::S(H)
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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).