MESON Chess Problem Database

Problem Display
PID: 270474 (5R2/1r1N2nK/B2Bp3/2R1P2N/1p2k2n/1P2Pp2/3P2pq/8 w - - 0 1)

Simoni, Francesco

Sp. HM., Contromossa Scacchi, 1980

5R2/1r1N2nK/B2Bp3/2R1P2N/1p2k2n/1P2Pp2/3P2pq/8

#2

11 + 9

15601 Albrecht-Leiss-Degener Collection 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Qg1
      • 2.Sg3#
      • 2.Rf4#
    • 1...Qg3
      • 2.Sxg3#
    • 1...Qf4
      • 2.Rxf4#
    • 1...Qxe5
      • 2.Rxe5#
    • 1...Qh1
      • 2.Sg3#
      • 2.Rf4#
    • 1...Qh3
      • 2.Rf4#
    • 1...Shf5
      • 2.Sf6#
    • 1...Sgf5
      • 2.Sf6#
  • Tries
    • 1.Rc4+?
      • 1...Kd5
        • 2.Shf6#
        • 2.Sdf6#
        • 2.Bxb7#
        • 2.e4#
      • 1...Kd3!
  • Keys
    • 1.Rd5!
      • threat
        • 2.Rd4#
      • 1...Kxd5
        • 2.Bxb7#
      • 1...Qxe5
        • 2.Rxe5#
      • 1...exd5
        • 2.Sc5#
      • 1...Shf5
        • 2.Sf6#
      • 1...Sgf5
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • Q(b);N_GUARD::S(F),XQ(b)
    • Q(b);N_GUARD::R1(K),XQ(b)
    • Q(b);OGATE,XP(E)::R1(D),XQ(b)
    • Q(b);N_GUARD::R1(K)
    • S(f);P_PINS(F),SBLOCK::S(I)
    • S(i);P_PINS(I),SBLOCK::S(F)
  • Tries
    • Try
      • R(D);CHECK
      • Refutation
        • K(e);S_FLIGHT
  • Actual
    • R(D);
    • Threat
      • R1(D)
    • Vars
      • K(e);OGATEB,S_FLIGHT,XR(D)::B(G),XR(h)
      • Q(b);OGATE,XP(E)::R1(D),XQ(b)
      • P(g);SBLOCK,XR(D)::S(I)
      • S(f);P_PINS(F),SBLOCK::S(I)
      • S(i);P_PINS(I),SBLOCK::S(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).