MESON Chess Problem Database

Problem Display
PID: 194907 (3b4/q1rp3Q/R1b2k2/3n3p/1n1P3P/4RN2/B7/B6K w - - 0 1)

Guidelli, Giorgio

3/4 Prize, L'Italia Scacchistica, 1918

3b4/q1rp3Q/R1b2k2/3n3p/1n1P3P/4RN2/B7/B6K

#2

9 + 9

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd4
      • 2.Bxd4#
    • 1...Sc3
      • 2.Qf7#
    • 1...Sxe3
      • 2.Qf7#
    • 1...Sf4
      • 2.Qf7#
    • 1...Sb6
      • 2.Qf7#
      • 2.d5#
    • 1...Se7
      • 2.Qf7#
  • Tries
    • 1.Bxd5?
      • threat
        • 2.Qf7#
      • 1...d6
        • 2.Re6#
      • 1...Sxd5!
  • Keys
    • 1.Sg5!
      • threat
        • 2.Qf7#
      • 1...Sc3+
        • 2.Rf3#
      • 1...Sxe3+
        • 2.Se4#
      • 1...Sf4+
        • 2.Se4#
      • 1...Sb6+
        • 2.d5#
      • 1...Se7+
        • 2.Se4#
      • 1...d6
        • 2.Re6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(f);OGATE,P_SPINQ(f),XP(F)::B(A),XQ(f)
    • S(b);P_PINS(E)::QAR1(I)
    • S(b);P_PINS(E),XR(D)::QAR1(I)
  • Tries
    • Try
      • B(C);XS(b)
      • Threat
        • QAR1(I)
      • Vars
        • P(h);N_GUARD,N_SPINB(d)::R1(D)
      • Refutation
        • S(a);XB(C)
  • Actual
    • S(E);
    • Threat
      • QAR1(I)
    • Vars
      • S(b);CHECK,N_GUARD::R(D)
      • S(b);CHECK,XR(D)::S(E)
      • S(b);CHECK::S(E)
      • S(b);CHECK,N_SPINB(d),OGATE::B(A)+P(F)
      • P(h);N_GUARD,N_SPINB(d)::R1(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).