MESON Chess Problem Database

Problem Display
PID: 75331 (2K5/6n1/2p5/3k4/P2NN2R/1pB5/6Q1/1B6 w - - 0 1)

Valle, Giovanni Batista

1st Prize, Il Piccolo Scacchista, 1890

2K5/6n1/2p5/3k4/P2NN2R/1pB5/6Q1/1B6

#2

8 + 4

15 British Chess Magazine 1891
15 British Chess Magazine 1910
6169 Dal classico agli albori del moderno compositori scacchisti 2007
14868 Pirnie Collection 2012

SOLUTION

  • SOUND
  • Tries
    • 1.Sg5+?
      • 1...Kc4
        • 2.Qxc6#
      • 1...Kc5
        • 2.Qxc6#
      • 1...Ke5
        • 2.Sb5#
        • 2.Sf5#
      • 1...Kd6!
    • 1.Qg5+?
      • 1...Kc4
        • 2.Qc5#
      • 1...Sf5!
    • 1.Qxg7?
      • 1...Kc4
        • 2.Qf7#
        • 2.Qg8#
      • 1...b2
        • 2.Ba2#
      • 1...c5!
  • Keys
    • 1.Sf5!
      • 1...Kc4
        • 2.Se3#
      • 1...Ke6
        • 2.Sg5#
      • 1...Sxf5
        • 2.Qg8#
      • 1...c5
        • 2.Sg5#
      • 1...Sh5
        • 2.Qg8#
      • 1...Se6
        • 2.Se3#
      • 1...Se8
        • 2.Qg8#
      • 1...b2
        • 2.Ba2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAR2(B),XP(c)
        • K(b);OGATE,P-FLIGHT::QAR1(B),XP(c)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAR1(B)
      • Refutation
        • S(d);P_SPINS(d)
    • Try
      • Q(B);XS(d)
      • Vars
        • P(a);OGATEB::B(A)
      • Refutation
        • P(c);
  • Actual
    • S(E);
    • Vars
      • K(b);S_FLIGHT::S(E)
      • K(b);S_FLIGHT::S(F)
      • S(d);OGATE,XS(E)::QAB(B)
      • P(c);SBLOCK::QAB(B)+S(F)
      • S(d);OGATE::QAB(B)
      • S(d);SBLOCK::S(E)
      • P(a);OGATEB::B(A)
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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).