MESON Chess Problem Database

Problem Display
PID: 16637 (qR1b1k2/r1n1N2p/3N4/3bQ1n1/6RK/5p2/8/8 w - - 0 1)

Hassberg, Eric Manfred

2nd Prize, BCF 043. Ty., 1942-1943

qR1b1k2/r1n1N2p/3N4/3bQ1n1/6RK/5p2/8/8

#2

6 + 9

145 StrateGems 1998

SOLUTION

  • SOUND
  • Sets
    • 1...Sh3
      • 2.Qg7#
    • 1...Se4
      • 2.Qg7#
    • 1...Sge6
      • 2.Qf6#
    • 1...Sf7
      • 2.Rg8#
  • Tries
    • 1.Sg6+?
      • 1...Kg8
        • 2.Qh8#
      • 1...hxg6!
    • 1.Qf6+?
      • 1...Sf7
        • 2.Rg8#
      • 1...Bf7!
  • Keys
    • 1.Sef5!
      • threat
        • 2.Qg7#
      • 1...Sh3+
        • 2.Qe7#
      • 1...Se4+
        • 2.Qe7#
      • 1...Sge6+
        • 2.Qf6#
      • 1...Sf7+
        • 2.Qe7#
      • 1...Kg8
        • 2.Qg7#
      • 1...Sb5
        • 2.Qe8#
      • 1...Sa6
        • 2.Qe8#
      • 1...Sce6
        • 2.Qh8#
      • 1...Se8
        • 2.Qxe8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(c);P_PINS(E)::QAB1(C)
    • S(c);N_GUARD,P_PINS(E),S_CUTB(b)::QAR2(C)
    • S(c);OGATE,P_PINS(E)::R1(A)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(i);P-FLIGHT::QAR1(C)
      • Refutation
        • P(f);XS(E)
    • Try
      • Q(C);CHECK
      • Vars
        • S(c);OGATE,P_SPINS(c)::R1(A)
      • Refutation
        • B(b);N_SPINB(h),P_SPINB(b)
  • Actual
    • S(E);
    • Threat
      • QAB1(C)
    • Vars
      • S(c);CHECK::QAB1(C)
      • S(c);CHECK,N_GUARD,S_CUTB(b)::QAR2(C)
      • K(i);P-FLIGHT,P_SPINS(c)::QAR1(C)
      • S(e);N_GUARD::QAR1(C)
      • S(e);S_CUTB(b)::QAR2(C)
      • S(e);N_GUARD,N_SPINB(h)::QAR1(C),XS(e)
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).