MESON Chess Problem Database

Problem Display
PID: 194021 (8/4p2p/3pB2P/3PpN1p/4K1k1/4Q3/6Pp/3N3n w - - 0 1)

Belli, Nicolo

L'Italia Scacchistica, 1917

8/4p2p/3pB2P/3PpN1p/4K1k1/4Q3/6Pp/3N3n

#2

8 + 8

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Sf2+
      • 2.Sxf2#
    • 1...Sg3+
      • 2.Qxg3#
    • 1...h4
      • 2.Sg3#
      • 2.Sg7#
  • Tries
    • 1.Kd3?
      • 1...Sf2+
        • 2.Sxf2#
      • 1...h4
        • 2.Sg3#
        • 2.Sg7#
      • 1...Sg3
        • 2.Sf2#
        • 2.Qxg3#
      • 1...e4+!
    • 1.Sb2?
      • 1...Sg3+
        • 2.Qxg3#
      • 1...h4
        • 2.Sg3#
        • 2.Sg7#
      • 1...Sf2+!
    • 1.Sc3?
      • 1...Sg3+
        • 2.Qxg3#
      • 1...h4
        • 2.Sg3#
        • 2.Sg7#
      • 1...Sf2+!
  • Keys
    • 1.g3!
      • threat
        • 2.Sd4#
        • 2.Sh4#
        • 2.Sxd6#
        • 2.Sxe7#
        • 2.Sg7#
      • 1...Sf2+
        • 2.Sxf2#
      • 1...Sxg3+
        • 2.Qxg3#
      • 1...Kh3
        • 2.Sh4#
      • 1...h4
        • 2.Sg7#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(a);CHECK,N_GUARD::S(A),XS(a)
    • S(a);CHECK,N_GUARD::QAR1(C),XS(a)
  • Tries
    • Try
      • K(D);S_FLIGHT
      • Vars
        • S(a);CHECK,N_GUARD::S(A),XS(a)
      • Refutation
        • P(d);CHECK
    • Try
      • S(A);
      • Vars
        • S(a);CHECK,N_GUARD::QAR1(C),XS(a)
      • Refutation
        • S(a);CHECK
    • Try
      • S(A);
      • Vars
        • S(a);CHECK,N_GUARD::QAR1(C),XS(a)
      • Refutation
        • S(a);CHECK
  • Actual
    • P(B);
    • Threat
      • DUALS(5)
    • Vars
      • S(a);CHECK,N_GUARD::S(A),XS(a)
      • S(a);CHECK,OGATE,XP(B)::QAR1(C),XS(a)
      • K(c);S_FLIGHT::B(G)+S(F)
      • P(e);::B(G)+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).