MESON Chess Problem Database

Problem Display
PID: 119838 (8/2bK4/8/3pk2p/Q4R2/2r1p1p1/2n2N2/8 w - - 0 1)

Olson, Anders Elis Waldemar

Aftonbladet, 1916

8/2bK4/8/3pk2p/Q4R2/2r1p1p1/2n2N2/8

#2

4 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rd3
      • 2.Sxd3#
    • 1...Rc4
      • 2.Sd3#
    • 1...Rc5
      • 2.Sd3#
    • 1...Rc6
      • 2.Sd3#
    • 1...Sa1
      • 2.Qd4#
    • 1...Se1
      • 2.Qd4#
    • 1...Sa3
      • 2.Qd4#
    • 1...Sd4
      • 2.Qxd4#
    • 1...h4
      • 2.Sg4#
  • Tries
    • 1.Qxc2?
      • threat
        • 2.Qf5#
      • 1...Rxc2
        • 2.Sd3#
      • 1...Rd3
        • 2.Sxd3#
        • 2.Qxc7#
      • 1...Kxf4!
  • Keys
    • 1.Qc6!
      • threat
        • 2.Qf6#
      • 1...Kxf4
        • 2.Qf6#
      • 1...Rxc6
        • 2.Sd3#
      • 1...Bd6
        • 2.Qxd6#
      • 1...Bd8
        • 2.Qd6#
      • 1...d4
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 8
  • Sets
    • R(b);N_GUARD::S(A),XR(b)
    • R(b);N_GUARD::S(A)
    • S(a);N_GUARD::QAB1(B)
    • S(a);N_GUARD::QAB1(B),XS(a)
    • P(g);N_GUARD::S(A)
  • Tries
    • Try
      • Q(B);XS(a)
      • Threat
        • QAR1(B)
      • Vars
        • R(b);N_GUARD,XQ(B)::S(A)
      • Refutation
        • K(f);S_FLIGHT,XR(C)
  • Actual
    • Q(B);
    • Threat
      • QAB1(B)
    • Vars
      • K(f);S_FLIGHT,XR(C)::QAR2(B)
      • R(b);N_GUARD,XQ(B)::S(A)
      • B(h);N_GUARD::QAB1(B),XB(h)
      • B(h);N_GUARD::QAB1(B)
      • P(e);OGATE::QAR1(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).