MESON Chess Problem Database

Problem Display
PID: 70800 (nN6/p1p2Q2/r3p3/p1k1p3/P2RK3/3P4/8/8 w - - 0 1)

Malmstrom, Albert Wilhelm

Source?, 0000

nN6/p1p2Q2/r3p3/p1k1p3/P2RK3/3P4/8/8

#2

6 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rc6
      • 2.Sd7#
    • 1...Sb6
      • 2.Qxc7#
      • 2.Qe7#
      • 2.Qf8#
    • 1...c6
      • 2.Sd7#
  • Tries
    • 1.Rc4+?
      • 1...Kd6
        • 2.Qd7#
        • 2.Qf8#
      • 1...Kb6!
    • 1.Qxc7+?
      • 1...Rc6
        • 2.Sa6#
        • 2.Sd7#
        • 2.Rc4#
        • 2.Qxa5#
        • 2.Qxc6#
      • 1...Sxc7!
    • 1.Qd7?
      • threat
        • 2.Qb5#
      • 1...Kb6
        • 2.Qb5#
        • 2.Qc6#
      • 1...exd4
        • 2.Qxd4#
      • 1...Rb6
        • 2.Rc4#
      • 1...Rc6
        • 2.Qxc6#
      • 1...c6!
  • Keys
    • 1.Qf2!
      • 1...Kb6
        • 2.Rb4#
      • 1...exd4
        • 2.Qxd4#
      • 1...Rd6
        • 2.Rc4#
      • 1...Rb6
        • 2.Qc2#
      • 1...Rc6
        • 2.Sd7#
      • 1...Sb6
        • 2.Qf8#
      • 1...c6
        • 2.Sd7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • R(d);SBLOCK::S(F)
    • P(g);SBLOCK::S(F)
  • Tries
    • Try
      • R(C);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(E);CHECK,XP(g)
      • Refutation
        • S(h);XQ(E)
    • Try
      • Q(E);
      • Threat
        • QAR1(E)
      • Vars
        • P(c);OGATE,XR(C)::QAB1(E),XP(c)
        • R(d);SBLOCK::R1(C)
        • R(d);N_GUARD::QAR1(E),XR(d)
      • Refutation
        • P(g);
  • Actual
    • Q(E);
    • Vars
      • K(b);S_FLIGHT::QAB(E)+R(C),DCHECK
      • P(c);OGATE,P_SPINP(c),XR(C)::QAB1(E),XP(c)
      • R(d);SBLOCK::QAB(E)+R(C),DCHECK
      • R(d);SBLOCK::QAR(E)
      • R(d);SBLOCK::S(F)
      • S(h);SBLOCK,S_CUTR(d)::QAB(E)
      • P(g);SBLOCK::S(F)
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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).