MESON Chess Problem Database

Problem Display
PID: 206415 (6r1/4Npr1/7p/4Rp1k/3pR2B/3K1P2/8/3Q4 w - - 0 1)

van Dijk, Johannes

Der Tijd, 1925

6r1/4Npr1/7p/4Rp1k/3pR2B/3K1P2/8/3Q4

#2

7 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Bf6?
      • threat
        • 2.Rh4#
        • 2.Qh1#
      • 1...Rg1
        • 2.Rh4#
      • 1...Rg2
        • 2.Rh4#
      • 1...Rg3
        • 2.Rh4#
      • 1...Rg5
        • 2.Qh1#
      • 1...Rg4!
  • Keys
    • 1.Bg5!
      • threat
        • 2.f4#
      • 1...fxe4+
        • 2.fxe4#
      • 1...Kxg5
        • 2.Rxf5#
      • 1...Rxg5
        • 2.Qh1#
      • 1...hxg5
        • 2.Qh1#
      • 1...f4
        • 2.Qh1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(E);
      • Threat
        • DUALS(2)
      • Vars
        • R(f);::R1(D)
        • R(f);P_PINP(C)::R1(D)
        • R(f);N_SPINP(b)::QAR(A)
      • Refutation
        • R(f);
  • Actual
    • B(E);N_PINP(b)
    • Threat
      • QAB(A)+P(C)
    • Vars
      • P(b);CHECK,OGATE,XR(D)::QAB(A)+P(C),XP(b)
      • K(c);OGATEB,P-FLIGHT,P_SPINP(b),XB(E)::R1(F),XP(b)
      • R(f);SBLOCK,XB(E)::QAR(A)
      • P(d);SBLOCK,XB(E)::QAR(A)
      • P(b);::QAR(A)
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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).