MESON Chess Problem Database

Problem Display
PID: 228879 (3B4/5N1B/K3p1r1/p4kN1/3b4/3p2pP/8/2Q2r1n w - - 0 1)

Cristoffanini, Guido

Sp. HM., L'Italia Scacchistica, 1926

3B4/5N1B/K3p1r1/p4kN1/3b4/3p2pP/8/2Q2r1n

#2

7 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Be5
      • 2.Sh6#
    • 1...e5+
      • 2.Sd6#
  • Tries
    • 1.Qe3?
      • threat
        • 2.Sd6#
        • 2.Sh6#
        • 2.Qe4#
      • 1...e5+
        • 2.Sd6#
      • 1...Re1
        • 2.Sd6#
        • 2.Sh6#
        • 2.Qf3#
      • 1...Rf4
        • 2.Sd6#
        • 2.Sh6#
        • 2.Qxe6#
      • 1...Bc5
        • 2.Sh6#
        • 2.Qe4#
        • 2.Qe5#
      • 1...Be5
        • 2.Sh6#
        • 2.Qe4#
        • 2.Qxe5#
      • 1...Bg7
        • 2.Sd6#
        • 2.Qe4#
      • 1...Sf2
        • 2.Sd6#
        • 2.Sh6#
        • 2.Qf3#
      • 1...Bxe3!
  • Keys
    • 1.Qc6!
      • threat
        • 2.Qe4#
      • 1...Kf4
        • 2.Qe4#
      • 1...Re1
        • 2.Qf3#
      • 1...Rf4
        • 2.Qxe6#
      • 1...Sf2
        • 2.Qf3#
      • 1...e5
        • 2.Qf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • B(e);SBLOCK::S(E)
    • P(h);CHECK,SBLOCK::S(E)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • P(h);CHECK::S(E)
      • Refutation
        • B(e);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • K(g);N_SPINR(i),P-FLIGHT::QAR1(A)
      • R(a);N_GUARD::QAR2(A)
      • R(a);SBLOCK::QAB1(A),XP(h)
      • S(b);S_CUTR(a)::QAR2(A)
      • P(h);OGATE,P_PINQ(A)::QAR1(A)
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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).