MESON Chess Problem Database

Problem Display
PID: 265290 (Q7/3N4/3pn2K/3n1kpp/6r1/5P1P/b7/2B2Rr1 w - - 0 1)

Castellari, Umberto

La Scacchiera, 1952

Q7/3N4/3pn2K/3n1kpp/6r1/5P1P/b7/2B2Rr1

#2

7 + 9

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rc4
      • 2.Qxd5#
    • 1...Bb1
      • 2.Qxd5#
    • 1...Sc3
      • 2.fxg4#
    • 1...Se3
      • 2.fxg4#
    • 1...Sb4
      • 2.fxg4#
    • 1...Sdf4
      • 2.Qe4#
    • 1...Sb6
      • 2.fxg4#
    • 1...Sf6
      • 2.fxg4#
    • 1...Sdc7
      • 2.fxg4#
    • 1...Se7
      • 2.fxg4#
  • Tries
    • 1.Qf8+?
      • 1...Sf6
        • 2.Qxf6#
      • 1...Sxf8!
  • Keys
    • 1.Qe8!
      • threat
        • 2.Qg6#
      • 1...Se3
        • 2.Qf7#
      • 1...Sdf4
        • 2.Qf7#
      • 1...Se7
        • 2.Qf7#
      • 1...Sef4
        • 2.Qe4#
      • 1...Sf8
        • 2.fxg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • R(c);S_CUTB(b)::QAR2(G),XS(d)
    • B(b);N_GUARD::QAR2(G),XS(d)
    • S(d);::R(B)+P(C)DCHECK,XR(c)
    • S(d);OGATE::QAB1(G)
  • Tries
    • Try
      • Q(G);CHECK
      • Vars
        • S(d);N_GUARD,P_SPINS(d)::QAR1(G),XS(d)
      • Refutation
        • S(i);XQ(G)
  • Actual
    • Q(G);
    • Threat
      • QAB1(G)
    • Vars
      • S(d);N_GUARD::QAR2(G)
      • S(i);OGATE::QAB1(G)
      • S(i);::R(B)+P(C)DCHECK,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).