MESON Chess Problem Database

Problem Display
PID: 203496 (8/p7/K2P4/N3p3/R2qk3/4N3/4Q3/8 w - - 0 1)

Ochsendorf, K

Arbeiter Schachzeitung, 1924

8/p7/K2P4/N3p3/R2qk3/4N3/4Q3/8

#2

6 + 4

5454 Near Snap 2020
6490 yacpdb 2020
17467 ONOK 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Qb4
      • 2.Rxb4#
    • 1...Qc4+
      • 2.Rxc4#
  • Keys
    • 1.Sac4!
      • 1...Qb6+
        • 2.Sxb6#
      • 1...Qxc4+
        • 2.Rxc4#
      • 1...Qxd6+
        • 2.Sxd6#
      • 1...Kf4
        • 2.Qg4#
      • 1...Qxe3
        • 2.Sxe3#
      • 1...Qa1
        • 2.Sd2#
      • 1...Qb2
        • 2.Sxb2#
        • 2.Sd2#
      • 1...Qc3
        • 2.Sd2#
      • 1...Qc5
        • 2.Sd2#
      • 1...Qd1
        • 2.Sd2#
      • 1...Qd2
        • 2.Sxd2#
      • 1...Qd3
        • 2.Qg4#
      • 1...Qd5
        • 2.Sd2#

Anticipated by 21594(1920)

This anticipates 16419(1940)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 1
  • Sets
    • Q(a);OGATEB::R(C),XQ(a)
    • Q(a);CHECK,OGATEB::R(C),XQ(a)
  • Actual
    • S(D);N_PINQ(a)
    • Vars
      • Q(a);CHECK::R(C)+S(D),XQ(a)
      • Q(a);CHECK,OGATE,P_SPINQ(a),XS(D)::R(C),XQ(a)
      • Q(a);CHECK,XP(F)::R(C)+S(D),DCHECK,XQ(a)
      • K(b);P-FLIGHT::QAR1(A)
      • Q(a);P_SPINQ(a),XS(B)::R(C)+S(D),XQ(a)
      • Q(a);P_PINR(C)::R(C)+S(D),DCHECK
      • Q(a);::R(C)+S(D),DCHECK
      • Q(a);::R(C)+S(D),DCHECK,XQ(a)
      • Q(a);P_PINS(D),SBLOCK::QAR2(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).