MESON Chess Problem Database

Problem Display
PID: 235272 (2Q5/p2nNK2/1p6/1k2pp2/bpN1P3/1n1R4/q7/BR3B2 w - - 0 1)

Hoffmann, Fritz

Schach, 1965

2Q5/p2nNK2/1p6/1k2pp2/bpN1P3/1n1R4/q7/BR3B2

#2

9 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...a5
      • 2.Sd6#
    • 1...a6
      • 2.Qc6#
  • Tries
    • 1.Qa6+?
      • 1...Kc5
        • 2.Rd5#
      • 1...Kxa6!
    • 1.Qxd7+?
      • 1...Kxc4
        • 2.Rc3#
        • 2.Qd5#
      • 1...Kc5
        • 2.Rd5#
        • 2.Qd5#
      • 1...Ka6!
  • Keys
    • 1.Sc6!
      • threat
        • 2.Sxa7#
      • 1...Kxc4
        • 2.Rc3#
      • 1...Kc5
        • 2.Rd5#
      • 1...Sbc5
        • 2.Rxb4#
      • 1...Sdc5
        • 2.Sd6#
      • 1...a5
        • 2.Sa7#
      • 1...a6
        • 2.Sa7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(i);SBLOCK::S(E)
    • P(i);SBLOCK::QAB1(I)
  • Tries
    • Try
      • Q(I);CHECK
      • Vars
        • K(e);P-FLIGHT::R1(D)
      • Refutation
        • K(e);S_FLIGHT,XQ(I)
    • Try
      • Q(I);CHECK,XS(j)
      • Refutation
        • K(e);S_FLIGHT
  • Actual
    • S(G);
    • Threat
      • S(G),XP(i)
    • Vars
      • K(e);OGATEB,S_FLIGHT,XS(E)::B(C)+R(D),DCHECK
      • K(e);P-FLIGHT::R1(D)
      • S(b);OGATE,P_PINS(E),P_SPINP(d),SBLOCK::R1(B),XP(d)
      • S(j);SBLOCK::S(E)
      • P(i);::S(G)
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).