MESON Chess Problem Database

Problem Display
PID: 85691 (8/1K6/8/8/1RB5/8/5p2/k3bQ2 w - - 0 1)

Speckmann, Werner

Arbejder-Skak, 1964

8/1K6/8/8/1RB5/8/5p2/k3bQ2

#2

4 + 3

6490 yacpdb 2009
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qe2?
      • threat
        • 2.Qd1#
        • 2.Qa2#
        • 2.Qb2#
      • 1...Bxb4
        • 2.Qa2#
      • 1...Bc3
        • 2.Qd1#
        • 2.Qa2#
      • 1...Bd2!
    • 1.Qd3?
      • threat
        • 2.Rb1#
        • 2.Qb1#
        • 2.Qd1#
        • 2.Qa3#
      • 1...Bd2
        • 2.Rb1#
        • 2.Qb1#
        • 2.Qa3#
      • 1...Bc3
        • 2.Rb1#
        • 2.Qb1#
        • 2.Qd1#
        • 2.Qxc3#
      • 1...Bxb4!
    • 1.Qh3?
      • threat
        • 2.Qa3#
      • 1...Bc3
        • 2.Qxc3#
      • 1...Bxb4!
    • 1.Qxf2?
      • threat
        • 2.Qxe1#
        • 2.Qa7#
        • 2.Qa2#
        • 2.Qb2#
      • 1...Bxb4
        • 2.Qa2#
      • 1...Bd2
        • 2.Qa7#
      • 1...Bc3
        • 2.Qa7#
        • 2.Qa2#
      • 1...Bxf2!
  • Keys
    • 1.Ba2!
      • 1...Kxa2
        • 2.Qa6#

This anticipates 230759(1964)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);N_PINB(b)
      • Threat
        • DUALS(3)
      • Vars
        • B(b);XR(B)::QAR1(A)
      • Refutation
        • B(b);
    • Try
      • Q(A);N_PINB(b)
      • Threat
        • DUALS(4)
      • Refutation
        • B(b);XR(B)
    • Try
      • Q(A);N_PINB(b)
      • Threat
        • QAR2(A)
      • Vars
        • B(b);N_GUARD::QAB(A),XB(b)
      • Refutation
        • B(b);XR(B)
    • Try
      • Q(A);N_PINB(b),XP(c)
      • Threat
        • DUALS(4)
      • Vars
        • B(b);XR(B)::QAR1(A)
        • B(b);::QAR(A)
      • Refutation
        • B(b);XQ(A)
  • Actual
    • B(C);
    • Vars
      • K(a);N_SPINB(b),OGATEB,P-FLIGHT,XB(C)::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).