MESON Chess Problem Database

Problem Display
PID: 154417 (5n2/1p1B1N2/1P4p1/2P1B1p1/1p2k1Pr/1P5r/2P4p/3N1QbK w - - 0 1)

Jespersen, Karl Lorenz Jesper

Tidskrift for Schack, 1903

5n2/1p1B1N2/1P4p1/2P1B1p1/1p2k1Pr/1P5r/2P4p/3N1QbK

#2

11 + 10

4035 Aarsskrift for DSK 1935

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Qc4#
    • 1...Rd3
      • 2.Qxd3#
  • Tries
    • 1.Bc8?
      • threat
        • 2.Bxb7#
      • 1...Rd3
        • 2.Qxd3#
      • 1...Kd5!
    • 1.Qc4+?
      • 1...Kf3
        • 2.Sxg5#
      • 1...Bd4!
    • 1.Qf4+?
      • 1...Kd5
        • 2.Qc4#
      • 1...gxf4!
  • Keys
    • 1.Qa6!
      • threat
        • 2.Qxb7#
      • 1...Kf3
        • 2.Sxg5#
      • 1...Kd5
        • 2.Qc4#
      • 1...bxa6
        • 2.Bc6#
      • 1...Rd3
        • 2.Qxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(e);S_FLIGHT::QAB1(B)
    • R(c);N_GUARD::QAB1(B),XR(c)
  • Tries
    • Try
      • B(J);
      • Threat
        • B(J),XP(i)
      • Vars
        • R(c);N_GUARD::QAB1(B),XR(c)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(e);S_FLIGHT::S(K),XP(g)
      • Refutation
        • B(a);P_SPINB(a)
    • Try
      • Q(B);CHECK
      • Vars
        • K(e);OGATE,S_FLIGHT::QAB1(B)
      • Refutation
        • P(g);XQ(B)
  • Actual
    • Q(B);
    • Threat
      • QAB(B),XP(i)
    • Vars
      • K(e);S_FLIGHT::S(K),XP(g)
      • K(e);S_FLIGHT::QAB1(B)
      • P(i);N_GUARD,XQ(B)::B(J)
      • R(c);N_GUARD::QAB1(B),XR(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).