MESON Chess Problem Database

Problem Display
PID: 90652 (6N1/1K4pp/p1pP2kr/1pQnR3/r4p2/8/B5b1/6Rn w - - 0 1)

ten Cate, Pieter

Die Schwalbe, 1968

6N1/1K4pp/p1pP2kr/1pQnR3/r4p2/8/B5b1/6Rn

#2

7 + 12

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sc3
      • 2.Rg5#
    • 1...Se3
      • 2.Rg5#
    • 1...Sb4
      • 2.Rg5#
    • 1...Sb6
      • 2.Rg5#
    • 1...Sf6
      • 2.Se7#
      • 2.Rg5#
    • 1...Sc7
      • 2.Rg5#
    • 1...Se7
      • 2.Rg5#
  • Tries
    • 1.Qxd5?
      • threat
        • 2.Rg5#
        • 2.Qe6#
        • 2.Qf7#
      • 1...Rxa2
        • 2.Rg5#
        • 2.Qe6#
      • 1...Rc4
        • 2.Rg5#
        • 2.Qe6#
      • 1...Rh5
        • 2.Qe6#
        • 2.Qf7#
      • 1...c5
        • 2.Rg5#
      • 1...cxd5!
  • Keys
    • 1.Qxc6!
      • threat
        • 2.Qe8#
      • 1...Kf7
        • 2.Qe8#
      • 1...Sc3
        • 2.d7#
      • 1...Se3
        • 2.d7#
      • 1...Sb4
        • 2.Qe4#
      • 1...Sb6
        • 2.d7#
      • 1...Sf6
        • 2.Se7#
      • 1...Sc7
        • 2.dxc7#
      • 1...Se7
        • 2.dxe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 6
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(f);::R1(D)
  • Tries
    • Try
      • Q(C);XS(f)
      • Threat
        • DUALS(3)
      • Vars
        • P(h);P_PINQ(C)::R1(D)
      • Refutation
        • P(h);XQ(C)
  • Actual
    • Q(C);XP(h)
    • Threat
      • QAB(C)
    • Vars
      • K(i);N_SPINB(b),P_SPINS(f),S_FLIGHT::QAB1(C)
      • S(f);N_GUARD,P_PINQ(C)::QAR(C)+P(E)
      • S(f);OGATE,P_PINQ(C)::QAB(C)
      • S(f);N_GUARD,P_PINQ(C),SBLOCK::S(G)
      • S(f);OGATE,P_PINQ(C)::QAR(C)+P(E),XS(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).