MESON Chess Problem Database

Problem Display
PID: 173994 (3n4/B1N1pb1q/7p/7p/4k3/3N1RP1/n3p2K/7Q w - - 0 1)

Bottacchi, Antonio

L'Illustrazione Italiana, 1917

3n4/B1N1pb1q/7p/7p/4k3/3N1RP1/n3p2K/7Q

#2

7 + 9

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qf5
      • 2.Re3#
    • 1...e5
      • 2.Sf2#
  • Tries
    • 1.Qc1?
      • threat
        • 2.Qe3#
        • 2.Qf4#
      • 1...Kxf3
        • 2.Qf4#
      • 1...e1Q
        • 2.Qf4#
      • 1...e1R
        • 2.Qf4#
      • 1...Qf5
        • 2.Re3#
        • 2.Qe3#
      • 1...Se6
        • 2.Qe3#
        • 2.Qc6#
      • 1...e5
        • 2.Qe3#
      • 1...Sxc1!
    • 1.g4?
      • threat
        • 2.Re3#
        • 2.Rg3#
        • 2.Rh3#
      • 1...e1Q
        • 2.Re3#
      • 1...e1S
        • 2.Re3#
      • 1...e1R
        • 2.Re3#
      • 1...Qf5
        • 2.Re3#
      • 1...hxg4!
  • Keys
    • 1.Qb1!
      • threat
        • 2.Rf4#
      • 1...Kxf3
        • 2.Se5#
      • 1...Qf5
        • 2.Re3#
      • 1...Se6
        • 2.Qb7#
      • 1...e5
        • 2.Se1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(h);SBLOCK::QAB(A)+R(D),DCHECK
    • P(f);SBLOCK::S(C)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(c);S_FLIGHT,XR(D)::QAR1(A)
        • P(b);::QAR1(A)
        • P(f);::QAR1(A)
      • Refutation
        • S(a);XQ(A)
    • Try
      • P(E);
      • Threat
        • DUALS(3)
      • Vars
        • P(b);::QAB(A)+R(D),DCHECK
        • Q(h);::QAB(A)+R(D),DCHECK
      • Refutation
        • P(d);XP(E)
  • Actual
    • Q(A);
    • Threat
      • R1(D)
    • Vars
      • K(c);S_FLIGHT,XR(D)::S(C)
      • Q(h);SBLOCK::R1(D)
      • S(i);N_GUARD,S_CUTB(g)::QAB(A)
      • P(f);SBLOCK::QAB(A)+S(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).