MESON Chess Problem Database

Problem Display
PID: 90676 (5b2/PK2N3/5P2/2p1P2p/PBkp4/2Pr3p/Pp5Q/1b3B2 w - - 0 1)

van Dijk, Nils Gustav Gerard

Die Schwalbe, 1960

5b2/PK2N3/5P2/2p1P2p/PBkp4/2Pr3p/Pp5Q/1b3B2

#2

11 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...dxc3
      • 2.Qf4#
  • Tries
    • 1.Qg1?
      • threat
        • 2.Qg8#
      • 1...dxc3
        • 2.Qxc5#
      • 1...cxb4
        • 2.Qxd4#
      • 1...Bg7!
    • 1.Qh1?
      • threat
        • 2.Qd5#
      • 1...dxc3
        • 2.Qe4#
      • 1...cxb4
        • 2.Qc6#
      • 1...Bxe7!
    • 1.Qxb2?
      • threat
        • 2.Qb3#
      • 1...Bxa2
        • 2.Qxa2#
      • 1...dxc3
        • 2.Qxc3#
      • 1...cxb4
        • 2.Qxb4#
      • 1...Bc2!
    • 1.Qg2?
      • threat
        • 2.Qd5#
        • 2.Qg8#
      • 1...Bxe7
        • 2.Qg8#
      • 1...dxc3
        • 2.Qe4#
      • 1...cxb4
        • 2.Qc6#
      • 1...Bg7
        • 2.Qd5#
      • 1...hxg2!
    • 1.a8Q?
      • threat
        • 2.Qa6#
      • 1...Bxe7
        • 2.Qg8#
      • 1...dxc3
        • 2.Qf4#
      • 1...cxb4
        • 2.Qc8#
      • 1...Bxa2!
  • Keys
    • 1.Qxh3!
      • threat
        • 2.Qe6#
      • 1...dxc3
        • 2.Qh4#
      • 1...cxb4
        • 2.Qc8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(f);OGATEB,XP(D)::QAR(C)
  • Tries
    • Try
      • Q(C);
      • Threat
        • QAB(C)
      • Vars
        • P(f);OGATE,XP(D)::QAR1(C),XP(g)
        • P(g);N_GUARD,XB(F)::QAR1(C),XP(f)
      • Refutation
        • B(i);
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • P(f);OGATEB,XP(D)::QAR2(C)
        • P(g);OGATEB,XB(F)::QAR2(C)
      • Refutation
        • B(i);XS(K)
    • Try
      • Q(C);XP(b)
      • Threat
        • QAB1(C)
      • Vars
        • B(a);OGATE,XP(B)::QAB(C),XB(a)
        • P(f);OGATE,XP(D)::QAR1(C),XP(f)
        • P(g);OGATE,XB(F)::QAR1(C),XP(g)
      • Refutation
        • B(a);
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • B(i);XS(K)::QAB(C)
        • P(f);OGATEB,XP(D)::QAR2(C)
        • P(g);OGATEB,XB(F)::QAR2(C)
        • B(i);::QAB1(C)
      • Refutation
        • P(d);XQ(C)
    • Try
      • P(I);
      • Threat
        • QAB(I)
      • Vars
        • B(i);OGATE,XS(K)::QAB(I)
        • P(f);OGATEB,XP(D)::QAR(C)
        • P(g);OGATEB,XB(F)::QAR(I)
      • Refutation
        • B(a);XP(B)
  • Actual
    • Q(C);XP(d)
    • Threat
      • QAB(C)
    • Vars
      • P(f);OGATEB,XP(D)::QAR(C)
      • P(g);OGATEB,XB(F)::QAR(C)
HTML5 logo

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).