MESON Chess Problem Database

Problem Display
PID: 100976 (8/1B3N2/pn6/8/3kNp2/2Rpn1B1/5Q2/K7 w - - 0 1)

Greenwood, William M

Good Companions, 1918

8/1B3N2/pn6/8/3kNp2/2Rpn1B1/5Q2/K7

#2

7 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...d2
      • 2.Qxd2#
    • 1...fxg3
      • 2.Qf6#
    • 1...f3
      • 2.Be5#
  • Tries
    • 1.Qxe3+?
      • 1...fxe3
        • 2.Be5#
      • 1...Kxe3!
  • Keys
    • 1.Sed6!
      • 1...Kxc3
        • 2.Qb2#
      • 1...fxg3
        • 2.Qf6#
      • 1...Sc4
        • 2.Rxc4#
      • 1...Sa4
        • 2.Rc4#
      • 1...Sd5
        • 2.Rc4#
      • 1...Sd7
        • 2.Rc4#
      • 1...Sa8
        • 2.Rc4#
      • 1...Sc8
        • 2.Rc4#
      • 1...d2
        • 2.Qxd2#
      • 1...f3
        • 2.Be5#
      • 1...a5
        • 2.Sb5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • P(a);OGATEB::QAR2(B),XP(a)
    • P(d);OGATE,XB(D)::QAB(B)
    • P(d);OGATE::B(D)
  • Tries
    • Try
      • Q(B);CHECK,XS(b)
      • Vars
        • P(d);OGATE,SBLOCK,XQ(B)::B(D)
      • Refutation
        • K(c);P_SPINP(a),S_FLIGHT,XQ(B)
  • Actual
    • S(E);
    • Vars
      • K(c);N_SPINS(b),OGATEB,S_FLIGHT,XR(C)::QAB1(B)
      • P(d);OGATE,XB(D)::QAB(B)
      • S(f);N_GUARD::R1(C),XS(f)
      • S(f);N_GUARD::R1(C)
      • P(a);OGATEB::QAR2(B),XP(a)
      • P(d);OGATE::B(D)
      • P(e);N_GUARD::S(E)
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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).