MESON Chess Problem Database

Problem Display
PID: 34786 (4K3/8/5P2/4Q1B1/R3N1k1/3p1q1R/4rPp1/3B3r w - - 0 1)

Cristoffanini, Guido

4th Prize, De Problemist, 1929

4K3/8/5P2/4Q1B1/R3N1k1/3p1q1R/4rPp1/3B3r

#2

9 + 6

20 De Problemist 1930
35 L'Italia Scacchistica 1930

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf2
      • 2.Sxf2#
    • 1...Qe3
      • 2.Qe6#
    • 1...Qf5
      • 2.Qg3#
    • 1...Rxd1
      • 2.Rh4#
    • 1...Rhe1
      • 2.Rh4#
    • 1...Rf1
      • 2.Rh4#
    • 1...Rg1
      • 2.Rh4#
    • 1...Ree1
      • 2.Qe6#
    • 1...Ra2
      • 2.Qe6#
    • 1...Rb2
      • 2.Qe6#
    • 1...Rc2
      • 2.Qe6#
    • 1...Rd2
      • 2.Qe6#
    • 1...Rxf2
      • 2.Sxf2#
      • 2.Qe6#
    • 1...Re3
      • 2.Qe6#
  • Tries
    • 1.Qf4+?
      • 1...Kxh3
        • 2.Qh4#
      • 1...Qxf4!
  • Keys
    • 1.Bh6!
      • threat
        • 2.Qh5#
      • 1...Kxh3
        • 2.Sg5#
      • 1...Qxe4
        • 2.Qe6#
      • 1...Qxh3
        • 2.Sd2#
      • 1...Rxh3
        • 2.Qg5#
      • 1...Rxe4
        • 2.Qe6#
      • 1...Qf5
        • 2.Qg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 12
  • Sets
    • Q(e);P_SPINR(b),XP(B)::R(D)+S(E),DCHECK,XQ(e)
    • Q(e);N_GUARD,P_SPINR(b)::QAB(F)
    • Q(e);N_GUARD,P_SPINR(b),SBLOCK::QAR1(F)
    • R(a);N_GUARD,XB(A)::R1(C)
    • R(a);N_GUARD::R1(C)
    • R(b);P_SPINQ(e)::QAB(F)
  • Tries
    • Try
      • Q(F);CHECK,P_SPINS(E)
      • Vars
        • K(f);OGATE,S_FLIGHT,XR(C)::QAR1(F)
      • Refutation
        • Q(e);P_SPINR(b),XQ(F)
  • Actual
    • B(G);
    • Threat
      • QAB1(F)
    • Vars
      • K(f);S_FLIGHT,XR(C)::S(E)
      • Q(e);N_GUARD,P_PINQ(F),P_SPINQ(e),P_SPINR(b),XS(E)::QAB(F)
      • Q(e);N_GUARD,P_SPINR(b),SBLOCK,XR(C)::R(D)+S(E)
      • R(a);SBLOCK,XR(C)::QAR1(F)
      • R(b);P_PINQ(F),P_SPINQ(e),P_SPINR(b),XS(E)::QAB(F)
      • Q(e);N_GUARD,P_SPINR(b),SBLOCK::QAR1(F)
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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).