MESON Chess Problem Database

Problem Display
PID: 265161 (5Qb1/b1p2PPq/2N1p3/pPNk4/2p1R3/2B2P2/7P/1K2n3 w - - 0 1)

Brogi, Giuseppe

Schakend Nederland, 1970

5Qb1/b1p2PPq/2N1p3/pPNk4/2p1R3/2B2P2/7P/1K2n3

#2

11 + 9

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe4+
      • 2.fxe4#
    • 1...Qxh2
      • 2.Rd4#
    • 1...Qh3
      • 2.Rd4#
      • 2.Re5#
    • 1...Qh4
      • 2.Re5#
    • 1...Qh5
      • 2.Rd4#
    • 1...Qh6
      • 2.Rd4#
      • 2.Re5#
    • 1...Qh8
      • 2.Rd4#
      • 2.Re5#
    • 1...Sc2
      • 2.Re5#
    • 1...Sd3
      • 2.Rd4#
    • 1...a4
      • 2.Sb4#
  • Tries
    • 1.Bxa5?
      • threat
        • 2.Sb4#
      • 1...Qxe4+
        • 2.fxe4#
      • 1...Sc2
        • 2.Re5#
      • 1...Sd3
        • 2.Rd4#
      • 1...Bxc5!
  • Keys
    • 1.Bb4!
      • threat
        • 2.Qd8#
      • 1...Qxe4+
        • 2.fxe4#
      • 1...Qxh2
        • 2.Rd4#
      • 1...Bxc5
        • 2.Qxc5#
      • 1...axb4
        • 2.Sxb4#
      • 1...Qh4
        • 2.Re5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • Q(h);CHECK,OGATE,XR(E)::P(D),XQ(h)
    • Q(h);N_PINR(E),XP(B)::R1(E)
    • Q(h);N_PINR(E)::R1(E)
    • S(a);N_PINR(E)::R1(E)
    • P(c);N_GUARD::S(H)
  • Tries
    • Try
      • B(C);XP(c)
      • Threat
        • S(H)
      • Vars
        • Q(h);CHECK,OGATE,XR(E)::P(D),XQ(h)
        • S(a);N_PINR(E)::R1(E)
      • Refutation
        • B(f);XS(G)
  • Actual
    • B(C);
    • Threat
      • QAR(K)
    • Vars
      • Q(h);CHECK,OGATE,XR(E)::P(D),XQ(h)
      • Q(h);N_PINR(E),XP(B)::R1(E)
      • B(f);OGATE,XS(G)::QAR1(K),XB(f)
      • P(c);XB(C)::S(H),XP(c)
      • Q(h);N_PINR(E)::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).