MESON Chess Problem Database

Problem Display
PID: 145141 (1B6/3K1pp1/8/2pk1p2/4N3/1n6/1nN1Q3/4b3 w - - 0 1)

Somma, Francesco

L'Echiquier, 1929

1B6/3K1pp1/8/2pk1p2/4N3/1n6/1nN1Q3/4b3

#2

5 + 8

14868 Pirnie Collection 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Bf2
      • 2.Sc3#
    • 1...Bc3
      • 2.Sxc3#
    • 1...Bg3
      • 2.Sc3#
    • 1...Bh4
      • 2.Sc3#
    • 1...Sd2
      • 2.Sc3#
    • 1...g5
      • 2.Sf6#
    • 1...g6
      • 2.Sf6#
  • Tries
    • 1.Qd3+?
      • 1...Sd4
        • 2.Se3#
      • 1...Sxd3!
  • Keys
    • 1.Qf3!
      • threat
        • 2.Sd2#
      • 1...Kc4
        • 2.Sd6#
      • 1...fxe4
        • 2.Qxf7#
      • 1...Bd2
        • 2.Sxd2#
      • 1...Sd2
        • 2.Sxd2#
      • 1...Sd4
        • 2.Se3#
      • 1...c4
        • 2.Qxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 6
  • Sets
    • B(a);N_GUARD::S(C)
    • B(a);N_GUARD::S(C),XB(a)
    • S(c);S_CUTB(a)::S(C)
    • P(h);N_GUARD::S(C)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • S(c);P_SPINS(c)::S(A)
      • Refutation
        • S(b);XQ(B)
  • Actual
    • Q(B);
    • Threat
      • QAB(B)+S(C)
    • Vars
      • K(e);S_FLIGHT::S(C)
      • P(f);OGATE,P_SPINP(f),SBLOCK,XS(C)::QAB(B),XP(g)
      • B(a);::QAB(B)+S(C),XB(a)
      • S(c);::QAB(B)+S(C),XS(c)
      • S(c);SBLOCK::S(A)
      • P(d);SBLOCK::QAR2(B),XP(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).