MESON Chess Problem Database

Problem Display
PID: 200659 (6Q1/2np1NR1/r1b4p/1p3p2/q3Pk2/BpnR3p/7K/4N3 w - - 0 1)

Myrhaug, Alf

Stella Polaris, 1967

6Q1/2np1NR1/r1b4p/1p3p2/q3Pk2/BpnR3p/7K/4N3

#2

8 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Bxe4
      • 2.Bc1#
    • 1...Sxe4
      • 2.Rf3#
  • Tries
    • 1.Qd8?
      • threat
        • 2.Qh4#
      • 1...fxe4
        • 2.Qf6#
      • 1...Kxe4!
  • Keys
    • 1.Qh7!
      • threat
        • 2.Qxf5#
      • 1...Kxe4
        • 2.Rg4#
      • 1...Qxe4
        • 2.Qxh6#
      • 1...Bxe4
        • 2.Bc1#
      • 1...Sxe4
        • 2.Rf3#
      • 1...fxe4
        • 2.Bd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(i);SBLOCK,XP(E)::B(C)
    • S(b);SBLOCK,XP(E)::R1(D)
  • Tries
    • Try
      • Q(H);
      • Threat
        • QAR2(H)
      • Vars
        • P(g);OGATEB,SBLOCK,XP(E)::QAR2(H)
      • Refutation
        • K(e);P-FLIGHT,XP(E)
  • Actual
    • Q(H);
    • Threat
      • QAR1(H),XP(g)
    • Vars
      • K(e);P-FLIGHT,P_SPINP(g),XP(E)::R(G)
      • Q(d);SBLOCK,XP(E)::QAB(H),XP(j)
      • B(i);SBLOCK,XP(E)::B(C)
      • S(b);SBLOCK,XP(E)::R1(D)
      • P(g);XP(E)::B(C)
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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).