Problem Display
PID: 208718 (8/1Q6/8/8/4p3/8/2k1K3/3R4 w - - 0 1)

Bruchner, Siegfried

Deutsche Schachblatter, 1949

8/1Q6/8/8/4p3/8/2k1K3/3R4

#2

3 + 2


5454 Near Snap 2020
15148 Sadier Collection 2020

SOLUTION


  • SOUND
  • Tries
    • 1.Rd2+?
      • 1...Kc1
        • 2.Qb2#
      • 1...Kc3!
    • 1.Rd4?
      • threat
        • 2.Rc4#
      • 1...Kc1
        • 2.Rc4#
      • 1...Kc3!
    • 1.Rd5?
      • threat
        • 2.Rc5#
      • 1...Kc1
        • 2.Rc5#
      • 1...Kc3!
    • 1.Rd6?
      • threat
        • 2.Rc6#
      • 1...Kc1
        • 2.Rc6#
      • 1...Kc3!
    • 1.Rd7?
      • threat
        • 2.Rc7#
      • 1...Kc1
        • 2.Rc7#
      • 1...Kc3!
    • 1.Rd8?
      • threat
        • 2.Rc8#
      • 1...Kc1
        • 2.Rc8#
      • 1...Kc3!
    • 1.Qb6?
      • 1...Kc3
        • 2.Rc1#
      • 1...e3!
  • Keys
    • 1.Ke3!
      • 1...Kxd1
        • 2.Qb1#
      • 1...Kc3
        • 2.Rc1#

Anticipated by 205721(1925), 121023(1940)

This anticipates 47259(2002)

FEATURES


  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB1(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(A);
      • Threat
        • R(A)
      • Vars
        • K(a);P-FLIGHT::R(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(A);
      • Threat
        • R(A)
      • Vars
        • K(a);P-FLIGHT::R(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(A);
      • Threat
        • R(A)
      • Vars
        • K(a);P-FLIGHT::R(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(A);
      • Threat
        • R(A)
      • Vars
        • K(a);P-FLIGHT::R(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(A);
      • Threat
        • R(A)
      • Vars
        • K(a);P-FLIGHT::R(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(a);P-FLIGHT::R(A)
      • Refutation
        • P(b);
  • Actual
    • K(B);P-FLIGHT
    • Vars
      • K(a);S_FLIGHT,XR(A)::QAR2(C)
      • K(a);P-FLIGHT::R(A)


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).