MESON Chess Problem Database

Problem Display
PID: 24752 (3b3K/3QN2b/p1p2P2/r1p5/2p1k3/3Np3/2p3P1/B1r5 w - - 0 1)

Jespersen, Karl Lorenz Jesper

2nd Prize, Nordisk Schackforbund, 1911

3b3K/3QN2b/p1p2P2/r1p5/2p1k3/3Np3/2p3P1/B1r5

#2

7 + 11

14868 Pirnie Collection 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Bf5
      • 2.Qxf5#
    • 1...Bg8
      • 2.Qf5#
    • 1...cxd3
      • 2.Qg4#
  • Tries
    • 1.Sf2+?
      • 1...Kf4
        • 2.Qg4#
      • 1...exf2!
    • 1.Sxc5+?
      • 1...Rxc5
        • 2.Qd4#
      • 1...Kf4!
  • Keys
    • 1.Sd5!
      • threat
        • 2.Sc3#
      • 1...Bxf6+
        • 2.Sxf6#
      • 1...Kxd3
        • 2.Sc3#
      • 1...cxd3
        • 2.Qe6#
      • 1...cxd5
        • 2.Qxh7#
      • 1...c3
        • 2.Sxc3#
      • 1...Ra3
        • 2.Sxc5#
      • 1...e2
        • 2.Sf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • B(j);N_GUARD::QAB1(E),XB(j)
    • B(j);N_GUARD::QAB1(E)
    • P(d);SBLOCK,XS(C)::QAR2(E)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(e);P-FLIGHT::QAR1(E)
      • Refutation
        • P(c);XS(C)
    • Try
      • S(C);CHECK,XP(g)
      • Vars
        • R(f);XS(C)::QAR1(E)
      • Refutation
        • K(e);P-FLIGHT
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • B(k);CHECK,XP(D)::S(F),XB(k)
      • K(e);S_FLIGHT,XS(C)::QAR(E)+S(F)
      • P(d);SBLOCK,XS(C)::QAR2(E)
      • P(i);SBLOCK,XS(F)::QAB(E),XB(j)
      • P(d);::S(F),XP(d)
      • R(f);N_GUARD::S(C),XP(g)
      • P(c);N_GUARD::S(C)
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).