MESON Chess Problem Database

Problem Display
PID: 189476 (7b/7b/8/N2p4/1P1kpQP1/8/4K3/8 w - - 0 1)

Palkoska, Emil

Dame und Laufer, 1911

7b/7b/8/N2p4/1P1kpQP1/8/4K3/8

#2

5 + 5

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Kc3
      • 2.Qd2#
    • 1...Be5
      • 2.Qd2#
      • 2.Qe3#
    • 1...Bf6
      • 2.Qxf6#
  • Tries
    • 1.Qc1?
      • threat
        • 2.Sc6#
        • 2.Qb2#
        • 2.Qa1#
      • 1...e3
        • 2.Qxe3#
      • 1...Ke5!
  • Keys
    • 1.Qh6!
      • 1...Kc3
        • 2.Qd2#
      • 1...Ke5
        • 2.Sc6#
      • 1...e3
        • 2.Qxe3#
      • 1...Bg6
        • 2.Qxh8#
      • 1...Bf5
        • 2.Qxh8#
      • 1...Bg8
        • 2.Qxh8#
      • 1...Be5
        • 2.Qd2#
        • 2.Qe3#
      • 1...Bf6
        • 2.Qxf6#
      • 1...Bg7
        • 2.Qxg7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • K(a);N_SPINP(b),S_FLIGHT::QAB1(C)
    • B(e);N_GUARD::QAB(C),XB(e)
  • Tries
    • Try
      • Q(C);N_PINP(b)
      • Threat
        • DUALS(3)
      • Vars
        • P(b);::QAB1(C),XP(b)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(C);N_PINP(b)
    • Vars
      • K(a);S_FLIGHT::QAB1(C)
      • K(a);S_FLIGHT::S(E)
      • P(b);::QAB1(C),XP(b)
      • B(d);OGATE::QAB(C),XB(e)
      • B(e);N_GUARD::QAB(C),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).