MESON Chess Problem Database

Problem Display
PID: 85852 (8/8/2Q3B1/8/6p1/5q2/5R2/5K1k w - - 0 1)

Speckmann, Werner

Die Schwalbe, 1971

8/8/2Q3B1/8/6p1/5q2/5R2/5K1k

#2

4 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qg2+
      • 2.Qxg2#
    • 1...Qe4
      • 2.Bxe4#
      • 2.Qxe4#
    • 1...Qd5
      • 2.Qxd5#
  • Tries
    • 1.Be8?
      • 1...Qg2+
        • 2.Qxg2#
      • 1...Qxc6
        • 2.Bxc6#
      • 1...Qe4
        • 2.Qxe4#
        • 2.Qh6#
      • 1...Qd5
        • 2.Qxd5#
      • 1...g3!
  • Keys
    • 1.Qe4!
      • 1...Qg2+
        • 2.Qxg2#
      • 1...Qxe4
        • 2.Bxe4#
      • 1...g3
        • 2.Qh4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(b);CHECK,N_PINR(B),OGATE::QAB1(C),XQ(b)
    • Q(b);N_PINR(B),OGATEB::QAB(C),XQ(b)
  • Tries
    • Try
      • B(D);
      • Vars
        • Q(b);CHECK,N_PINR(B),OGATE::QAB1(C),XQ(b)
        • Q(b);N_PINR(B),N_SPINQ(b),OGATE,XQ(C)::B(D),XQ(b)
        • Q(b);N_PINR(B),OGATEB::QAB(C),XQ(b)
      • Refutation
        • P(c);
  • Actual
    • Q(C);
    • Vars
      • Q(b);CHECK,N_PINR(B),OGATE::QAB1(C),XQ(b)
      • Q(b);N_PINR(B),N_SPINQ(b),OGATE,XQ(C)::B(D),XQ(b)
      • P(c);OGATE::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).