MESON Chess Problem Database

Problem Display
PID: 262121 (2BK4/2R5/pp1PN3/q4PP1/pN2k3/4Bp2/4nP2/Q7 w - - 0 1)

Somma, Francesco

Schweizerische Schachzeitung, 1933

2BK4/2R5/pp1PN3/q4PP1/pN2k3/4Bp2/4nP2/Q7

#2

11 + 7

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5
      • 2.Qb1#
    • 1...b5
      • 2.Sc5#
  • Tries
    • 1.Rc4+?
      • 1...Kxf5
        • 2.Sf8#
        • 2.Qf6#
      • 1...Sd4!
    • 1.Qd4+?
      • 1...Kxf5
        • 2.Sf8#
      • 1...Sxd4!
  • Keys
    • 1.Re7!
      • threat
        • 2.Sc5#
      • 1...b5+
        • 2.Sc7#
      • 1...Kxf5
        • 2.Sf8#
      • 1...Qxb4
        • 2.Sf4#
      • 1...Qc5
        • 2.Sxc5#
      • 1...Qe5
        • 2.Qb1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(e);SBLOCK::QAB(A)
    • P(g);N_GUARD,P_PINR(I),S_CUTQ(e)::S(H)
  • Tries
    • Try
      • R(I);CHECK
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • Q(A);CHECK
      • Vars
        • K(d);S_CUTS(a),S_FLIGHT,XP(E)::B(J)+S(H)
      • Refutation
        • S(a);XQ(A)
  • Actual
    • R(I);
    • Threat
      • R(I)+S(H),DCHECK
    • Vars
      • P(g);CHECK,S_CUTQ(e)::R(I)+S(H)
      • K(d);S_CUTQ(e),S_FLIGHT,XP(E)::B(J)+S(H)
      • Q(e);N_GUARD,XS(D)::R(I)+S(H)
      • Q(e);::R(I)+S(H),DCHECK,XQ(e)
      • Q(e);SBLOCK::QAB(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).