MESON Chess Problem Database

Problem Display
PID: 137774 (b1B2rqr/7R/3p1k2/4p1NP/4Q2p/7P/5NK1/2b2R2 w - - 0 1)

Ellerman, Arnoldo

Svenska Dagbladet, 1933

b1B2rqr/7R/3p1k2/4p1NP/4Q2p/7P/5NK1/2b2R2

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qxg5+
      • 2.Sg4#
    • 1...Bxg5
      • 2.Sg4#
    • 1...Bxe4+
      • 2.Sxe4#
    • 1...d5
      • 2.Qf5#
  • Keys
    • 1.Qb7!
      • threat
        • 2.Se4#
      • 1...Qxg5+
        • 2.Sg4#
      • 1...Kxg5
        • 2.Se4#
      • 1...e4
        • 2.Qe7#
      • 1...Qa2
        • 2.Se4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • Q(h);CHECK,SBLOCK,XS(F)::R(A)+S(B),DCHECK
    • B(a);SBLOCK,XS(F)::R(A)+S(B),DCHECK
    • B(f);CHECK,XQ(E)::R(A)+S(B),DCHECK,XB(f)
    • P(d);N_PINQ(E)::QAR1(E)
  • Actual
    • Q(E);
    • Threat
      • R(A)+S(B),DCHECK
    • Vars
      • Q(h);CHECK,SBLOCK,XS(F)::R(A)+S(B),DCHECK
      • K(e);S_FLIGHT,XS(F)::S(B)
      • P(c);N_PINQ(E)::QAB1(E)
      • Q(h);N_PINS(F),P_PINS(B)::S(F)
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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).