MESON Chess Problem Database

Problem Display
PID: 248692 (8/2Kpn2Q/8/2pk1b2/1p4N1/2PpR1P1/8/8 w - - 0 1)

Olsson, Anders

Tidskrift for Schack, 1917

8/2Kpn2Q/8/2pk1b2/1p4N1/2PpR1P1/8/8

#2

6 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Be4
      • 2.Qxe4#
      • 2.Qf7#
    • 1...Bxg4
      • 2.Qxd3#
      • 2.Qe4#
    • 1...Be6
      • 2.Qxd3#
      • 2.Qe4#
    • 1...c4
      • 2.Re5#
  • Tries
    • 1.Qh1+?
      • 1...Be4
        • 2.Qxe4#
      • 1...Kc4!
  • Keys
    • 1.Re4!
      • threat
        • 2.Sf6#
      • 1...Kxe4
        • 2.Qh1#
      • 1...Bxe4
        • 2.Qf7#
      • 1...Bxg4
        • 2.c4#
      • 1...c4
        • 2.Re5#
      • 1...Sg8
        • 2.Qxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(c);SBLOCK::R1(B)
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • B(e);N_GUARD,P_SPINB(e)::QAB1(F),XB(e)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • R(B);
    • Threat
      • S(D)
    • Vars
      • K(d);OGATEB,P_SPINB(e),S_FLIGHT,XR(B)::QAB(F)
      • B(e);N_GUARD,SBLOCK,XR(B)::QAB(F)
      • B(e);XS(D)::P(A)
      • P(c);SBLOCK::R1(B)
      • S(g);N_GUARD::QAR2(F),XB(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).