MESON Chess Problem Database

Problem Display
PID: 193537 (8/3pK3/1P1P4/1b1k4/NpR2P2/3pP3/3nn3/Q7 w - - 0 1)

Wahlmark, Carl Primus

Tidskrift for Schack, 1915

8/3pK3/1P1P4/1b1k4/NpR2P2/3pP3/3nn3/Q7

#2

8 + 7

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Sxc4
      • 2.Qh1#
    • 1...Sc1
      • 2.Qd4#
    • 1...Sg1
      • 2.Qd4#
    • 1...Sg3
      • 2.Qd4#
    • 1...Sd4
      • 2.Qxd4#
    • 1...Sxf4
      • 2.Qd4#
  • Tries
    • 1.Qg7?
      • threat
        • 2.Qf7#
        • 2.Qg8#
      • 1...Kxc4
        • 2.Qf7#
        • 2.Qg8#
      • 1...Sxc4
        • 2.Qg2#
      • 1...Sxf4
        • 2.Qd4#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Bxc4!
  • Keys
    • 1.Qh8!
      • threat
        • 2.Qg8#
      • 1...Kxc4
        • 2.Qg8#
      • 1...Bxc4
        • 2.Qa8#
      • 1...Sxc4
        • 2.Qh1#
      • 1...Sxf4
        • 2.Qd4#
      • 1...Sd4
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • S(a);N_GUARD,SBLOCK,XR(D)::QAB(A)
    • S(b);N_GUARD::QAR1(A)
    • S(b);N_GUARD::QAR1(A),XS(b)
    • S(b);N_GUARD,XP(E)::QAR1(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);N_GUARD,SBLOCK,XR(D)::QAB(A)
        • S(b);N_GUARD,XP(E)::QAR1(A)
        • S(b);N_GUARD::QAR1(A),XS(b)
      • Refutation
        • B(e);XR(D)
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • K(f);S_FLIGHT,XR(D)::QAB(A)
      • B(e);N_GUARD,SBLOCK,XR(D)::QAB(A)
      • S(a);N_GUARD,SBLOCK,XR(D)::QAB(A)
      • S(b);N_GUARD,XP(E)::QAR1(A)
      • S(b);N_GUARD::QAR1(A),XS(b)
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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).