MESON Chess Problem Database

Problem Display
PID: 196611 (2k5/1ppNK3/3Qp3/2N5/2n5/2R5/2r5/8 w - - 0 1)

Wester, Anders Emil

Suomen Shakki, 1958

2k5/1ppNK3/3Qp3/2N5/2n5/2R5/2r5/8

#2

5 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...b5
      • 2.Qa6#
    • 1...c6
      • 2.Qb8#
  • Tries
    • 1.Sb6+?
      • 1...Sxb6
        • 2.Qd8#
      • 1...cxb6
        • 2.Qd8#
      • 1...Kb8!
    • 1.Qa6?
      • threat
        • 2.Qxb7#
        • 2.Qa8#
      • 1...c6
        • 2.Qxb7#
      • 1...Ra2
        • 2.Qxb7#
      • 1...Rb2
        • 2.Qa8#
      • 1...Sa5
        • 2.Qa8#
      • 1...Sb6
        • 2.Qxb7#
      • 1...Sd6
        • 2.Qa8#
      • 1...bxa6!
  • Keys
    • 1.Sa6!
      • threat
        • 2.Qxc7#
      • 1...Sxd6
        • 2.Sb6#
      • 1...bxa6
        • 2.Qxa6#
      • 1...cxd6
        • 2.Sb6#
      • 1...c5
        • 2.Qxc5#
        • 2.Qc7#
        • 2.Qb8#
      • 1...c6
        • 2.Qc7#
        • 2.Qb8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • P(d);OGATEB::QAB(C)
    • P(e);OGATE::QAR1(C)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • S(b);XS(D)::QAR1(C)
        • P(e);XS(D)::QAR1(C)
      • Refutation
        • K(f);P-FLIGHT,P_SPINP(e)
    • Try
      • Q(C);P_PINP(d)
      • Threat
        • DUALS(2)
      • Vars
        • P(e);::QAB1(C),XP(d)
        • R(a);::QAB1(C),XP(d)
        • R(a);::QAR2(C)
        • S(b);::QAR2(C)
        • S(b);::QAB1(C),XP(d)
      • Refutation
        • P(d);N_SPINP(d),XQ(C)
  • Actual
    • S(B);
    • Threat
      • QAR1(C),XP(e)
    • Vars
      • S(b);N_GUARD,P_SPINP(e),XQ(C)::S(D)
      • P(d);OGATE,XS(B)::QAB(C),XP(d)
      • P(e);N_GUARD,P_SPINS(b),XQ(C)::S(D)
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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).