MESON Chess Problem Database

Problem Display
PID: 263772 (2Nb2q1/8/3pPkpB/2pQ1PR1/2p5/r1P4B/P7/4K3 w - - 0 1)

van Dijk, Johannes

Tijdschrift vd NSB, 1933

2Nb2q1/8/3pPkpB/2pQ1PR1/2p5/r1P4B/P7/4K3

#2

10 + 8

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe6+
      • 2.Qxe6#
    • 1...Qf8
      • 2.Rxg6#
    • 1...Qh8
      • 2.Rxg6#
    • 1...gxf5
      • 2.Qxf5#
  • Tries
    • 1.fxg6?
      • threat
        • 2.Qf3#
        • 2.Qf5#
      • 1...Qxe6+
        • 2.Qxe6#
      • 1...Rxc3
        • 2.Qf5#
      • 1...Qxg6!
  • Keys
    • 1.Qf3!
      • threat
        • 2.fxg6#
      • 1...Qxe6+
        • 2.fxe6#
      • 1...Ke5
        • 2.f6#
      • 1...Rxc3
        • 2.Qxc3#
      • 1...gxf5
        • 2.Qxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • Q(h);CHECK,OGATE,XP(H)::QAR1(E),XQ(h)
    • Q(h);N_GUARD::R1(G),XP(f)
    • P(f);OGATE,XP(F)::QAR1(E),XP(f)
  • Tries
    • Try
      • P(F);XP(f)
      • Threat
        • DUALS(2)
      • Vars
        • Q(h);CHECK,OGATE,XP(H)::QAR1(E),XQ(h)
        • R(a);XP(C)::QAR1(E)
      • Refutation
        • Q(h);XP(F)
  • Actual
    • Q(E);
    • Threat
      • QAR(E)+P(F),XP(f)
    • Vars
      • Q(h);CHECK,OGATE,XP(H)::QAR(E)+P(F),XQ(h)
      • K(e);OGATE,S_FLIGHT::R(G)+P(F)
      • R(a);OGATE,XP(C)::QAB(E),XR(a)
      • P(f);OGATE,P_SPINP(f),XP(F)::QAR1(E),XP(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).