MESON Chess Problem Database

Problem Display
PID: 266323 (3R1NK1/b1p1N2p/2p2p1R/4k3/4n3/B2n2P1/B1r2r2/3Q3b w - - 0 1)

Castellari, Umberto

L'Italia Scacchistica, 1951

3R1NK1/b1p1N2p/2p2p1R/4k3/4n3/B2n2P1/B1r2r2/3Q3b

#2

9 + 11

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Bd4
      • 2.Sd7#
    • 1...Sc1
      • 2.Sd7#
    • 1...Se1
      • 2.Sd7#
    • 1...Sb2
      • 2.Sd7#
    • 1...Sb4
      • 2.Sd7#
    • 1...Sf4
      • 2.Sd7#
    • 1...Sdc5
      • 2.Qd4#
    • 1...c5
      • 2.Rd5#
    • 1...f5
      • 2.Re6#
  • Tries
    • 1.Sxc6+?
      • 1...Rxc6
        • 2.Rd5#
      • 1...Kf5!
    • 1.Qh5+?
      • 1...Rf5
        • 2.Qxf5#
      • 1...f5
        • 2.Re6#
      • 1...Sg5!
  • Keys
    • 1.Qg4!
      • threat
        • 2.Qe6#
      • 1...Sxg3
        • 2.Sd7#
      • 1...Rf5
        • 2.Qxf5#
      • 1...Sf4
        • 2.Qf5#
      • 1...Sdc5
        • 2.Sxc6#
      • 1...Sec5
        • 2.Qd4#
      • 1...Sg5
        • 2.Sd7#
      • 1...Sd6
        • 2.Sd7#
      • 1...f5
        • 2.Re6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 5
    • REMOVED MATES = 6
  • Sets
    • B(i);SBLOCK::S(H)
    • S(d);::S(H)
    • S(d);OGATE::QAB1(A)
    • P(g);N_GUARD::R1(G)
    • P(h);OGATE::R1(E)
  • Tries
    • Try
      • S(F);CHECK,XP(g)
      • Vars
        • R(b);XS(F)::R1(G)
      • Refutation
        • K(f);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::QAR1(A),XR(c)
        • P(h);OGATE,P_SPINP(h)::R1(E)
      • Refutation
        • S(e);P_SPINS(e)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • S(e);XP(D)::S(H)
      • R(c);N_GUARD::QAR1(A),XR(c)
      • S(d);S_CUTR(c)::QAR1(A)
      • S(d);S_CUTR(b)::S(F),XP(g)
      • S(e);OGATE::QAB1(A)
      • S(e);::S(H)
      • P(h);OGATE::R1(E)
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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).