MESON Chess Problem Database

Problem Display
PID: 240578 (4r3/3B1pR1/1q3P2/1p1P1N2/5B1p/1KQ1P2k/8/2b5 w - - 0 1)

Cristoffanini, Guido

Shakhmaty i Shashki, 1931

4r3/3B1pR1/1q3P2/1p1P1N2/5B1p/1KQ1P2k/8/2b5

#2

9 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe3
      • 2.Se7#
    • 1...Qd4
      • 2.Se7#
    • 1...Qa5
      • 2.Se7#
    • 1...Qc5
      • 2.Se7#
    • 1...Qb8
      • 2.Se7#
    • 1...Rxe3
      • 2.Sd6#
    • 1...Ra8
      • 2.Sd6#
    • 1...Rb8
      • 2.Sd6#
    • 1...Rc8
      • 2.Sd6#
    • 1...Rf8
      • 2.Sd6#
    • 1...Rg8
      • 2.Sd6#
    • 1...Rh8
      • 2.Sd6#
  • Tries
    • 1.e4+?
      • 1...Qe3
        • 2.Se7#
      • 1...Be3!
  • Keys
    • 1.Qd3!
      • threat
        • 2.Qf1#
      • 1...Qxe3
        • 2.Se7#
      • 1...Rxe3
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 10
  • Sets
    • Q(e);N_GUARD,P_PINQ(B),P_SPINQ(e),XP(C)::B(H)+S(F)
    • Q(e);N_GUARD::B(H)+S(F)
    • R(g);N_GUARD,P_PINQ(B),P_SPINR(g),XP(C)::B(H)+S(F)
    • R(g);N_GUARD::B(H)+S(F)
  • Tries
    • Try
      • P(C);CHECK
      • Vars
        • Q(e);P_PINQ(B),P_SPINQ(e)::B(H)+S(F)
      • Refutation
        • B(a);P_SPINB(a)
  • Actual
    • Q(B);
    • Threat
      • QAB(B)
    • Vars
      • Q(e);N_GUARD,P_PINQ(B),P_SPINQ(e),XP(C)::B(H)+S(F)
      • R(g);N_GUARD,P_PINQ(B),P_SPINR(g),XP(C)::B(H)+S(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).