MESON Chess Problem Database

Problem Display
PID: 147701 (3N2K1/2B1p3/Rb6/3Pnk1p/2n5/3P1N1P/8/4QR2 w - - 0 1)

Cristoffanini, Guido

L'Italia Scacchistica, 1931

3N2K1/2B1p3/Rb6/3Pnk1p/2n5/3P1N1P/8/4QR2

#2

10 + 6

14868 Pirnie Collection 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Bg1
      • 2.Qe4#
    • 1...Bf2
      • 2.Qe4#
    • 1...Bd4
      • 2.Qe4#
    • 1...Ba5
      • 2.Qe4#
    • 1...Bc5
      • 2.Qe4#
    • 1...Ba7
      • 2.Qe4#
    • 1...Bxc7
      • 2.Qe4#
    • 1...Sxd3
      • 2.Qe6#
    • 1...Sg4
      • 2.Qe6#
    • 1...Sc6
      • 2.Qe6#
    • 1...Sg6
      • 2.Qe6#
    • 1...Sd7
      • 2.Qe6#
    • 1...Sf7
      • 2.Qe6#
  • Tries
    • 1.Sxe5+?
      • 1...Kg5
        • 2.Sdf7#
      • 1...Bf2!
    • 1.Qxe5+?
      • 1...Kg6
        • 2.Qg5#
        • 2.Qe6#
      • 1...Sxe5!
  • Keys
    • 1.Sf7!
      • threat
        • 2.Sh4#
      • 1...Kf4
        • 2.Sd4#
      • 1...Kf6
        • 2.S3xe5#
      • 1...Kg6
        • 2.Sh4#
      • 1...Sxf3
        • 2.Qe6#
      • 1...Sxf7
        • 2.Qe6#
      • 1...Bf2
        • 2.Qe4#
      • 1...h4
        • 2.Sxh4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 11
  • Sets
    • B(e);::QAB1(A)
    • B(e);XB(H)::QAB1(A)
    • S(b);OGATE,XP(C)::QAB1(A)
    • S(b);OGATE::QAB1(A)
  • Tries
    • Try
      • S(D);CHECK,XS(b)
      • Vars
        • K(c);P-FLIGHT::S(I)
      • Refutation
        • B(e);P_SPINB(e)
    • Try
      • Q(A);CHECK,XS(b)
      • Refutation
        • S(a);XQ(A)
  • Actual
    • S(I);
    • Threat
      • R(B)+S(D),DCHECK
    • Vars
      • K(c);P-FLIGHT,P_SPINS(b)::R(B)+S(D)
      • K(c);P-FLIGHT,P_SPINB(e)::R(B)+S(D),XS(b)
      • K(c);P_SPINB(e),S_FLIGHT::S(D)
      • S(b);OGATE,P_SPINS(b),XS(D)::QAB1(A)
      • S(b);OGATE,XS(I)::QAB1(A)
      • B(e);::QAB1(A)
      • P(d);::R(B)+S(D),DCHECK,XP(d)
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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).