MESON Chess Problem Database

Problem Display
PID: 157150 (4N1B1/3p4/QPp1p3/B5N1/3kP2R/1p3P2/1P3K2/8 w - - 0 1)

Cristoffanini, Guido

Il Secolo, 1925

4N1B1/3p4/QPp1p3/B5N1/3kP2R/1p3P2/1P3K2/8

#2

11 + 5

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Ke5
      • 2.Bc3#
    • 1...c5
      • 2.Bc3#
    • 1...e5
      • 2.Qc4#
  • Tries
    • 1.Sxe6+?
      • 1...Ke5
        • 2.Bc3#
        • 2.Rh5#
      • 1...dxe6!
    • 1.Qc4+?
      • 1...Ke5
        • 2.Sf7#
        • 2.Bc3#
        • 2.Qc3#
        • 2.f4#
      • 1...Kxc4!
    • 1.Qb5?
      • threat
        • 2.Bc3#
        • 2.e5#
      • 1...c5
        • 2.Bc3#
      • 1...d5
        • 2.Bc3#
      • 1...e5
        • 2.Bc3#
        • 2.Qc4#
      • 1...cxb5!
  • Keys
    • 1.Rh5!
      • 1...Kc5
        • 2.Sxe6#
      • 1...Ke5
        • 2.Sxe6#
      • 1...d5
        • 2.Sxe6#
      • 1...c5
        • 2.Bc3#
      • 1...e5
        • 2.Qc4#
      • 1...d6
        • 2.Sxe6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::B(F)
    • P(c);SBLOCK::B(F)
    • P(d);SBLOCK::QAR1(H)
  • Tries
    • Try
      • S(G);CHECK,XP(d)
      • Refutation
        • P(e);XS(G)
    • Try
      • Q(H);CHECK
      • Refutation
        • K(b);P-FLIGHT,P_SPINP(d),XQ(H)
    • Try
      • Q(H);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);::B(F)
        • P(e);::B(F)
      • Refutation
        • P(c);XQ(H)
  • Actual
    • R(E);
    • Vars
      • K(b);S_FLIGHT::R(E)+S(G),DCHECK,XP(d)
      • K(b);S_FLIGHT::R(E)+S(G),XP(d)
      • P(e);N_GUARD::S(G),XP(d)
      • P(c);SBLOCK::B(F)
      • P(d);SBLOCK::QAR1(H)
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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).