MESON Chess Problem Database

Problem Display
PID: 243556 (3B3N/8/B2nk1bR/R3b3/4QPn1/6P1/2N5/1K6 w - - 0 1)

Castellari, Umberto

L'Italia Scacchistica, 1950

3B3N/8/B2nk1bR/R3b3/4QPn1/6P1/2N5/1K6

#2

10 + 5

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sf5
      • 2.Qd5#
  • Tries
    • 1.Qd5+?
      • 1...Kf5
        • 2.Sd4#
      • 1...Kd7!
    • 1.f5+?
      • 1...Sxf5
        • 2.Qd5#
      • 1...Kd7!
  • Keys
    • 1.Qc6!
      • threat
        • 2.Bc8#
      • 1...Kf5
        • 2.Sd4#
      • 1...Bxh8
        • 2.Bc4#
      • 1...Sf6
        • 2.Rxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(c);SBLOCK::QAB1(D)
  • Tries
    • Try
      • Q(D);CHECK,N_PINB(b),P_PINB(e),P_SPINS(B)
      • Vars
        • K(d);N_PINS(B),N_SPINB(e),P_SPINB(b),S_FLIGHT::S(B)
      • Refutation
        • K(d);N_SPINB(e),P_SPINS(c),S_FLIGHT
    • Try
      • P(E);CHECK
      • Vars
        • S(c);SBLOCK,XP(E)::QAB1(D)
      • Refutation
        • K(d);N_SPINB(b),S_FLIGHT
  • Actual
    • Q(D);N_PINB(b),P_PINB(e),P_PINS(c),P_SPINS(B)
    • Threat
      • B(G)
    • Vars
      • K(d);N_PINS(B),N_SPINB(e),N_SPINS(c),P_SPINB(b),S_FLIGHT::S(B)
      • B(b);XS(J)::B(G)
      • S(a);N_GUARD,N_SPINB(e)::R1(F),XB(b)
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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).