MESON Chess Problem Database

Problem Display
PID: 187713 (8/3p4/4N1K1/4k3/2Q4p/5n2/8/6B1 w - - 0 1)

Chocolous, Jiri

Chess Weekly, 1909

8/3p4/4N1K1/4k3/2Q4p/5n2/8/6B1

#2

4 + 4

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Se1
      • 2.Bh2#
    • 1...Sd2
      • 2.Bh2#
    • 1...Sh2
      • 2.Bxh2#
    • 1...Sg5
      • 2.Bh2#
  • Tries
    • 1.Sd8?
      • threat
        • 2.Sf7#
      • 1...Kd6
        • 2.Qc5#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Sg5
        • 2.Bh2#
        • 2.Qd4#
      • 1...d5!
    • 1.Qe4+?
      • 1...Kd6
        • 2.Bc5#
      • 1...Kxe4!
  • Keys
    • 1.Sg5!
      • threat
        • 2.Sf7#
      • 1...Kd6
        • 2.Qc5#
      • 1...Sxg5
        • 2.Bh2#
      • 1...Sd4
        • 2.Bh2#
        • 2.Qxd4#
      • 1...d5
        • 2.Qc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • S(a);N_GUARD::B(A)
    • S(a);N_GUARD::B(A),XS(a)
  • Tries
    • Try
      • S(C);
      • Threat
        • S(C)
      • Vars
        • K(c);S_FLIGHT::QAB1(B)
        • S(a);N_GUARD::QAB1(B),XS(a)
      • Refutation
        • P(d);
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);S_FLIGHT::B(A)
      • Refutation
        • K(c);P-FLIGHT,XQ(B)
  • Actual
    • S(C);
    • Threat
      • S(C)
    • Vars
      • K(c);S_FLIGHT::QAB1(B)
      • S(a);N_GUARD,XS(C)::B(A)
      • P(d);N_GUARD,SBLOCK::QAB(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).