MESON Chess Problem Database

Problem Display
PID: 44200 (3q4/n6b/Q2pBb2/pN4pr/4k3/8/1B1K1RP1/6n1 w - - 0 1)

de Barbieri, Vittorio

Het Schaakleven, 1931

3q4/n6b/Q2pBb2/pN4pr/4k3/8/1B1K1RP1/6n1

#2

7 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qa8
      • 2.Sxd6#
    • 1...Qc8
      • 2.Sxd6#
    • 1...Qe8
      • 2.Sxd6#
    • 1...Qg8
      • 2.Sxd6#
    • 1...Qh8
      • 2.Sxd6#
  • Tries
    • 1.Qc6+?
      • 1...d5
        • 2.Qc2#
      • 1...Sxc6!
  • Keys
    • 1.Qxd6!
      • threat
        • 2.Bd5#
      • 1...Qxd6+
        • 2.Sxd6#
      • 1...Bc3+
        • 2.Sxc3#
      • 1...Sf3+
        • 2.gxf3#
      • 1...Qa8
        • 2.Qd3#
      • 1...Qg8
        • 2.Qd3#
        • 2.Qd5#
      • 1...Bg8
        • 2.Bf5#
      • 1...g4
        • 2.Rf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 4
  • Sets
    • Q(j);N_GUARD::S(E),XP(f)
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • P(f);P_SPINP(f)::QAB(F)
      • Refutation
        • S(h);XQ(F)
  • Actual
    • Q(F);P_SPINQ(F),XP(f)
    • Threat
      • B(G)
    • Vars
      • Q(j);CHECK,XQ(F)::S(E),XQ(j)
      • B(g);CHECK,N_GUARD::S(E),XB(g)
      • S(a);CHECK,OGATE::P(D),XS(a)
      • Q(j);N_GUARD,N_PINQ(F)::QAB1(F)
      • B(i);N_GUARD::B(G)
      • P(d);N_GUARD::R1(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).