MESON Chess Problem Database

Problem Display
PID: 145904 (3K4/8/3k4/1P6/bp1P1N2/2n1n1NP/7Q/8 w - - 0 1)

Roura, Juan R

Good Companions (December Meredith Ty.), 1917

3K4/8/3k4/1P6/bp1P1N2/2n1n1NP/7Q/8

#2

7 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Sb1
      • 2.Se4#
    • 1...Scd1
      • 2.Se4#
    • 1...Sa2
      • 2.Se4#
    • 1...Se2
      • 2.Se4#
    • 1...Se4
      • 2.Sxe4#
    • 1...Scd5
      • 2.Se4#
    • 1...Sed1
      • 2.Sf5#
    • 1...Sf1
      • 2.Sf5#
    • 1...Sc2
      • 2.Sf5#
    • 1...Sg2
      • 2.Sf5#
    • 1...Sc4
      • 2.Sf5#
    • 1...Sg4
      • 2.Sf5#
    • 1...Sed5
      • 2.Sf5#
    • 1...Sf5
      • 2.Sxf5#
  • Keys
    • 1.Qa2!
      • threat
        • 2.Qe6#
      • 1...Sxa2
        • 2.Se4#
      • 1...Bb3
        • 2.Qa6#
      • 1...Scd5
        • 2.Se4#
      • 1...Sc4
        • 2.Sf5#
      • 1...Sed5
        • 2.Sf5#
      • 1...b3
        • 2.Qa3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 10
  • Sets
    • S(a);N_GUARD::S(B)
    • S(a);N_GUARD::S(B),XS(a)
    • S(b);N_GUARD::S(B)
    • S(b);N_GUARD::S(B),XS(b)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • S(a);N_GUARD,XQ(A)::S(B)
      • B(c);OGATE::QAR(A)
      • S(a);N_GUARD::S(B)
      • S(b);N_GUARD::S(B)
      • P(d);OGATEB::QAB(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).