MESON Chess Problem Database

Problem Display
PID: 63619 (6Q1/B2p4/2p1p3/K4R2/2kP4/1p6/1P2P3/8 w - - 0 1)

Powis, RD

Chess, 1946

6Q1/B2p4/2p1p3/K4R2/2kP4/1p6/1P2P3/8

#2

7 + 5

SOLUTION

  • SOUND
  • Tries
    • 1.Qxe6+?
      • 1...d5
        • 2.Qxc6#
      • 1...dxe6!
    • 1.Qf8?
      • threat
        • 2.Qb4#
        • 2.Qc5#
      • 1...exf5
        • 2.Qc5#
      • 1...c5
        • 2.Qxc5#
      • 1...e5
        • 2.Qc5#
      • 1...d6!
  • Keys
    • 1.d5!
      • threat
        • 2.Qg4#
      • 1...cxd5
        • 2.Qc8#
      • 1...exd5
        • 2.Rf4#
      • 1...exf5
        • 2.d6#
      • 1...e5
        • 2.d6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(G);CHECK,XP(d)
      • Vars
        • P(e);N_GUARD,P_SPINP(e)::QAR2(G),XP(c)
      • Refutation
        • P(e);XQ(G)
    • Try
      • Q(G);N_PINP(d)
      • Threat
        • DUALS(2)
      • Vars
        • P(d);XR(E)::QAR1(G)
        • P(c);::QAR1(G),XP(c)
        • P(d);::QAR1(G)
      • Refutation
        • P(e);
  • Actual
    • P(C);N_PINP(d)
    • Threat
      • QAR(G)
    • Vars
      • P(c);OGATEB,XP(C)::QAR(G)
      • P(d);P_SPINP(d),XP(C)::R(E)
      • P(d);XR(E)::QAB(G)+P(C)
      • P(d);::QAB(G)+P(C)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).