MESON Chess Problem Database

Problem Display
PID: 120022 (1bq5/2pbrp1P/2p1k1NK/1pP2pn1/1P1B1prp/8/8/7Q w - - 0 1)

Jespersen, Karl Lorenz Jesper

Deutsche Schachzeitung, 1909

1bq5/2pbrp1P/2p1k1NK/1pP2pn1/1P1B1prp/8/8/7Q

#2

7 + 14

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qa6
      • 2.Sf8#
    • 1...Qb7
      • 2.Sf8#
    • 1...Qf8+
      • 2.Sxf8#
    • 1...Rg1
      • 2.Sxf4#
    • 1...Rg2
      • 2.Sxf4#
    • 1...Rg3
      • 2.Sxf4#
    • 1...Be8
      • 2.Sf8#
  • Tries
    • 1.Qf3?
      • threat
        • 2.Qb3#
      • 1...Qf8+
        • 2.Sxf8#
      • 1...Be8
        • 2.Sf8#
      • 1...Rg3
        • 2.Sxf4#
      • 1...Sxf3!
  • Keys
    • 1.Qg2!
      • threat
        • 2.Qa2#
      • 1...Qf8+
        • 2.Sxf8#
      • 1...Rxg2
        • 2.Sxf4#
      • 1...Be8
        • 2.Sf8#
      • 1...Qa6
        • 2.Sf8#
      • 1...Rg3
        • 2.Sxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 2
  • Sets
    • Q(n);N_GUARD::S(E)
    • Q(n);CHECK,N_GUARD::S(E),XQ(n)
    • R(b);N_GUARD::S(E),XP(a)
    • B(j);S_CUTQ(n)::S(E)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB(A)
      • Vars
        • Q(n);CHECK,N_GUARD::S(E),XQ(n)
        • B(j);S_CUTQ(n)::S(E)
        • R(b);N_GUARD::S(E),XP(a)
      • Refutation
        • S(f);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • Q(n);CHECK,N_GUARD::S(E),XQ(n)
      • R(b);N_GUARD,XQ(A)::S(E),XP(a)
      • B(j);S_CUTQ(n)::S(E)
      • Q(n);N_GUARD::S(E)
      • R(b);N_GUARD::S(E),XP(a)
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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).