MESON Chess Problem Database

Problem Display
PID: 148178 (7K/pn6/k1P4R/4Q3/1p6/1N6/4N2p/2r2B1q w - - 0 1)

Cristoffanini, Guido

L'Italia Scacchistica, 1930

7K/pn6/k1P4R/4Q3/1p6/1N6/4N2p/2r2B1q

#2

7 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Sa5
      • 2.Qxa5#
    • 1...Sd6
      • 2.Qa5#
    • 1...Sd8
      • 2.Qa5#
  • Tries
    • 1.Sc3+?
      • 1...Kb6
        • 2.Sa4#
      • 1...Rxf1
        • 2.Qb5#
      • 1...Qxf1!
  • Keys
    • 1.Qc7!
      • threat
        • 2.Qxb7#
      • 1...Kb5
        • 2.Sc3#
      • 1...Qxc6
        • 2.Sexc1#
      • 1...Rxc6
        • 2.Sg1#
      • 1...Sa5
        • 2.Qxa5#
      • 1...Sc5
        • 2.Qa5#
      • 1...Sd6
        • 2.Qa5#
      • 1...Sd8
        • 2.Qa5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(g);N_GUARD::QAR1(D),XS(g)
    • S(g);N_GUARD::QAR1(D)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(e);P-FLIGHT::S(B)
        • R(a);XB(A)::QAB1(D)
      • Refutation
        • Q(b);XB(A)
  • Actual
    • Q(D);
    • Threat
      • QAB1(D),XS(g)
    • Vars
      • K(e);S_FLIGHT::B(A)+S(B),DCHECK
      • Q(b);N_GUARD,P_SPINQ(b),XP(E)::B(A)+S(B),XR(a)
      • R(a);N_GUARD,P_SPINR(a),XP(E)::B(A)+S(B)
      • S(g);N_GUARD::QAR1(D),XS(g)
      • S(g);N_GUARD::QAR1(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).