MESON Chess Problem Database

Problem Display
PID: 265359 (R3N3/3k4/N1pppP2/p7/1b1p4/6p1/4R3/1K1Q4 w - - 0 1)

Castellari, Umberto

Probleemblad, 1957

R3N3/3k4/N1pppP2/p7/1b1p4/6p1/4R3/1K1Q4

#2

7 + 8

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...c5
      • 2.Qa4#
  • Tries
    • 1.Qb3?
      • threat
        • 2.Qxe6#
      • 1...c5
        • 2.Qa4#
      • 1...e5
        • 2.Qf7#
      • 1...d5!
    • 1.Qh1?
      • threat
        • 2.Qh7#
      • 1...e5
        • 2.Qh3#
      • 1...c5
        • 2.Qb7#
      • 1...d5!
    • 1.Qd3?
      • threat
        • 2.Qh7#
      • 1...c5
        • 2.Qb5#
      • 1...e5
        • 2.Qf5#
      • 1...d5!
  • Keys
    • 1.Qxd4!
      • threat
        • 2.Qa7#
      • 1...c5
        • 2.Qxd6#
      • 1...e5
        • 2.Qg4#
      • 1...Bc5
        • 2.Sxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(e);OGATEB::QAB(B)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAB1(B),XP(g)
      • Vars
        • P(e);OGATEB::QAB(B)
        • P(g);OGATE::QAR2(B)
      • Refutation
        • P(f);
    • Try
      • Q(B);
      • Threat
        • QAR(B)
      • Vars
        • P(g);OGATEB::QAB(B)
        • P(e);OGATE::QAR2(B)
      • Refutation
        • P(f);
    • Try
      • Q(B);
      • Threat
        • QAR(B)
      • Vars
        • P(e);OGATEB::QAB(B)
        • P(g);OGATEB::QAB(B)
      • Refutation
        • P(f);
  • Actual
    • Q(B);P_PINP(f),XP(c)
    • Threat
      • QAR(B)
    • Vars
      • P(e);S_CUTB(b)::QAR1(B),XP(f)
      • P(g);OGATEB::QAB(B)
      • B(b);N_GUARD::S(D),XB(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).