MESON Chess Problem Database

Problem Display
PID: 187786 (4bR2/3p4/5N2/1nP1kpp1/3r4/2BPP2K/B7/3Q4 w - - 0 1)

Silviera, P

The Times, 1909

4bR2/3p4/5N2/1nP1kpp1/3r4/2BPP2K/B7/3Q4

#2

9 + 7

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Bh5
      • 2.Sxd7#
    • 1...Bg6
      • 2.Sxd7#
    • 1...Bf7
      • 2.Sxd7#
    • 1...Sa3
      • 2.Bxd4#
    • 1...Sd6
      • 2.Bxd4#
    • 1...Sa7
      • 2.Bxd4#
    • 1...Sc7
      • 2.Bxd4#
    • 1...f4
      • 2.Sg4#
  • Tries
    • 1.exd4+?
      • 1...Kf4
        • 2.Sd5#
        • 2.Bd2#
      • 1...Sxd4!
  • Keys
    • 1.Qh5!
      • threat
        • 2.Qxe8#
      • 1...g4+
        • 2.Sxg4#
      • 1...Bxh5
        • 2.Sxd7#
      • 1...Bf7
        • 2.Sxd7#
      • 1...f4
        • 2.Sg4#
        • 2.Qxg5#
      • 1...Bg6
        • 2.Sxd7#
      • 1...Sd6
        • 2.Bxd4#
      • 1...Sc7
        • 2.Bxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • B(g);N_GUARD::S(H),XP(f)
    • S(b);N_GUARD::B(C),XR(a)
    • P(d);N_GUARD::S(H)
  • Tries
    • Try
      • P(E);CHECK,XR(a)
      • Refutation
        • S(b);P_SPINS(b),XP(E)
  • Actual
    • Q(A);
    • Threat
      • QAR(A),XB(g)
    • Vars
      • P(e);CHECK,P_SPINP(d)::S(H),XP(e)
      • B(g);N_GUARD,XQ(A)::S(H),XP(f)
      • B(g);N_GUARD::S(H),XP(f)
      • S(b);N_GUARD::B(C),XR(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).