MESON Chess Problem Database

Problem Display
PID: 259629 (2qR2Q1/3Np3/8/1r1p3K/1PP1P3/P2k1N1R/1P5p/1bBB4 w - - 0 1)

Sacconi, Antonio

Comm., L'Alfiere di Re, 1924

2qR2Q1/3Np3/8/1r1p3K/1PP1P3/P2k1N1R/1P5p/1bBB4

#2

13 + 7

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc4
      • 2.Sde5#
    • 1...Kxe4
      • 2.Qh7#
      • 2.Qg6#
    • 1...Rxb4
      • 2.Qxd5#
    • 1...Rb6
      • 2.Qxd5#
    • 1...Rb7
      • 2.Qxd5#
    • 1...Rb8
      • 2.Qxd5#
    • 1...dxc4+
      • 2.Sc5#
    • 1...dxe4+
      • 2.Sc5#
      • 2.Sde5#
    • 1...d4+
      • 2.Sg5#
  • Tries
    • 1.Sfe5+?
      • 1...Kxe4
        • 2.Qg4#
      • 1...Kd4!
  • Keys
    • 1.Qg2!
      • threat
        • 2.Qe2#
      • 1...dxc4+
        • 2.Sc5#
      • 1...dxe4+
        • 2.Sde5#
      • 1...d4+
        • 2.Sfe5#
      • 1...Kxc4
        • 2.Sde5#
      • 1...Kxe4
        • 2.Qg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • K(c);N_GUARD,P_SPINP(e),S_FLIGHT,XP(H)::S(K)
    • R(d);N_GUARD,XP(G)::QAR2(M),XP(e)
    • R(d);N_GUARD::QAR2(M),XP(e)
    • P(e);CHECK,XP(H)::R(L)+S(K),DCHECK
    • P(e);CHECK,SBLOCK::R(F)+S(E)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(c);N_GUARD,S_FLIGHT,XP(I)::QAR2(M)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • Q(M);
    • Threat
      • QAB1(M)
    • Vars
      • P(e);CHECK,SBLOCK,XP(H)::R(L)+S(K),DCHECK
      • P(e);CHECK,SBLOCK,XP(I)::R(L)+S(K),DCHECK
      • P(e);CHECK,SBLOCK::R(F)+S(E),DCHECK
      • K(c);N_GUARD,S_FLIGHT,XP(H)::S(K)
      • K(c);OGATEB,S_FLIGHT,XP(I)::QAB(M)
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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).