MESON Chess Problem Database

Problem Display
PID: 259667 (1R3B2/p1n5/rq1p2K1/pn3N2/pk4BR/4Pp2/PPQ5/8 w - - 0 1)

Somma, Francesco

Il Problema, 1932

1R3B2/p1n5/rq1p2K1/pn3N2/pk4BR/4Pp2/PPQ5/8

#2

10 + 10

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qd4
      • 2.a3#
    • 1...Qc5
      • 2.a3#
    • 1...Qc6
      • 2.a3#
  • Tries
    • 1.Bxf3+?
      • 1...Qd4
        • 2.Rxd4#
        • 2.Qc3#
        • 2.a3#
      • 1...Sd4!
    • 1.Bh3+?
      • 1...Qd4
        • 2.Rxd4#
        • 2.Qc3#
        • 2.a3#
      • 1...Sd4!
    • 1.Bh5+?
      • 1...Qd4
        • 2.Rxd4#
        • 2.Qc3#
        • 2.a3#
      • 1...Sd4!
  • Keys
    • 1.Sxd6!
      • threat
        • 2.Qc4#
      • 1...Qxd6+
        • 2.Be6#
      • 1...Sxd6
        • 2.Bd7#
      • 1...Sc3
        • 2.Qxc3#
      • 1...Qd4
        • 2.a3#
      • 1...Qc5
        • 2.a3#
      • 1...Qc6
        • 2.a3#
      • 1...Sa3
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • Q(g);P_SPINS(e)::P(A)
    • Q(g);N_SPINP(h),P_SPINS(e)::P(A)
  • Tries
    • Try
      • B(E);CHECK,XP(a)
      • Refutation
        • S(e);P_SPINQ(g),P_SPINS(e)
    • Try
      • B(E);CHECK
      • Refutation
        • S(e);P_SPINQ(g),P_SPINS(e)
    • Try
      • B(E);CHECK
      • Refutation
        • S(e);P_SPINQ(g),P_SPINS(e)
  • Actual
    • S(G);P_SPINS(G),XP(h)
    • Threat
      • QAR1(C)
    • Vars
      • Q(g);CHECK,N_GUARD,P_SPINQ(g),P_SPINS(e),XS(G)::R(F)+B(E)
      • S(e);N_GUARD,P_SPINQ(g),P_SPINS(e),XS(G)::R(F)+B(E)
      • S(e);N_GUARD,P_SPINQ(g)::QAB1(C),XS(e)
      • Q(g);P_SPINS(e)::P(A)
      • S(e);N_GUARD,P_SPINQ(g)::QAB1(C)
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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).