MESON Chess Problem Database

Problem Display
PID: 268401 (1K6/N3B3/p7/k3p2R/p3n2q/P1rN4/3Q4/8 w - - 0 1)

Cristoffanini, Guido

Die Schwalbe, 1937

1K6/N3B3/p7/k3p2R/p3n2q/P1rN4/3Q4/8

#2

7 + 7

15601 Albrecht-Leiss-Degener Collection 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Qe1
      • 2.Bd8#
    • 1...Qg3
      • 2.Bd8#
    • 1...Qh1
      • 2.Bd8#
    • 1...Qh2
      • 2.Bd8#
    • 1...Qh3
      • 2.Bd8#
    • 1...Qf4
      • 2.Bd8#
    • 1...Qg4
      • 2.Bd8#
    • 1...Qxh5
      • 2.Bd8#
    • 1...Sg5
      • 2.Bd8#
    • 1...Sf6
      • 2.Bd8#
  • Tries
    • 1.Qxc3+?
      • 1...Kb6
        • 2.Qb4#
        • 2.Qc7#
      • 1...Sxc3!
  • Keys
    • 1.Sxe5!
      • threat
        • 2.Sc4#
      • 1...Kb6
        • 2.Sd7#
      • 1...Qg3
        • 2.Bd8#
      • 1...Qh2
        • 2.Bd8#
      • 1...Qf4
        • 2.Bd8#
      • 1...Sc5
        • 2.Qd8#
      • 1...Sg5
        • 2.Bd8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • Q(d);N_GUARD::B(F)
    • Q(d);N_GUARD,N_SPINP(f),SBLOCK,XR(D)::B(F)
    • S(c);N_SPINP(f),S_CUTQ(d)::B(F)
    • S(c);S_CUTQ(d)::B(F)
  • Tries
    • Try
      • Q(A);CHECK,XR(a)
      • Refutation
        • S(c);XQ(A)
  • Actual
    • S(C);XP(f)
    • Threat
      • R(D)+S(C),DCHECK
    • Vars
      • K(e);N_SPINR(a),S_CUTQ(d),S_CUTQ(d),S_CUTS(c),S_CUTS(c),S_FLIGHT::S(C)
      • Q(d);N_GUARD,P_PINS(C)::B(F)
      • S(c);::QAB(A)
      • S(c);S_CUTQ(d)::B(F)
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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).