MESON Chess Problem Database

Problem Display
PID: 70726 (B7/8/R2pNpQ1/K3k1p1/3pp1qp/4Nnp1/8/4nRbb w - - 0 1)

Overkamp, Petrus

2nd Prize, Tidskrift for Schack, 1953

B7/8/R2pNpQ1/K3k1p1/3pp1qp/4Nnp1/8/4nRbb

#2

7 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe6
      • 2.Qe8#
    • 1...Qh3
      • 2.Qxe4#
    • 1...Qf5
      • 2.Qxf5#
    • 1...Qh5
      • 2.Qxe4#
      • 2.Qf5#
    • 1...Qxe6
      • 2.Qxe4#
    • 1...Sd2
      • 2.Qxf6#
    • 1...Sh2
      • 2.Qxf6#
    • 1...d5
      • 2.Sxg4#
    • 1...f5
      • 2.Sc4#
  • Keys
    • 1.Sf4!
      • threat
        • 2.Qxe4#
      • 1...Kxf4
        • 2.Qxe4#
      • 1...Qxf4
        • 2.Qe8#
      • 1...Qf5
        • 2.Qxf5#
      • 1...Sd2
        • 2.Sxg4#
      • 1...Sh2
        • 2.Sc4#
      • 1...d5
        • 2.Qxf6#
      • 1...f5
        • 2.Qxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • K(j);OGATEB,P-FLIGHT,P_SPINP(l),XS(E)::QAR2(F)
    • Q(h);N_GUARD::QAR1(F),XP(g)
    • Q(h);N_GUARD::QAR1(F),XQ(h)
    • Q(h);N_GUARD,SBLOCK,XS(E)::QAR1(F),XP(g)
    • S(d);::QAB1(F),XP(m)
    • P(l);::S(B),XQ(h)
    • P(m);::S(B)
  • Actual
    • S(E);
    • Threat
      • QAR1(F),XP(g)
    • Vars
      • K(j);P_SPINS(d),S_FLIGHT,XS(E)::QAR1(F),XP(g)
      • Q(h);N_GUARD,SBLOCK,XS(E)::QAR(F)
      • Q(h);N_GUARD::QAR1(F),XQ(h)
      • S(d);::S(B),XQ(h)
      • S(d);::S(B)
      • P(l);::QAB1(F),XP(m)
      • P(m);OGATE::QAB1(F),XP(l)
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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).