MESON Chess Problem Database

Problem Display
PID: 228858 (5nq1/6p1/2pp1n2/R1r1k1N1/p1Q1P1B1/3RPpr1/K2N4/7b w - - 0 1)

Brogi, Giuseppe

Cristoffanini, Guido

L'Italia Scacchistica, 1926

5nq1/6p1/2pp1n2/R1r1k1N1/p1Q1P1B1/3RPpr1/K2N4/7b

#2

9 + 12

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc4+
      • 2.Sxc4#
    • 1...Qf7
      • 2.Sxf7#
    • 1...Qh7
      • 2.Sf7#
      • 2.Qc3#
      • 2.Qd4#
    • 1...Qh8
      • 2.Sf7#
      • 2.Qc3#
      • 2.Qd4#
    • 1...Rg2
      • 2.Sxf3#
    • 1...Rd5
      • 2.Qc3#
      • 2.Qd4#
    • 1...Sd5
      • 2.Qd4#
  • Tries
    • 1.Rd5+?
      • 1...Rxd5
        • 2.Qc3#
        • 2.Qd4#
      • 1...Sxd5
        • 2.Qd4#
      • 1...cxd5
        • 2.Qd4#
      • 1...Qxd5!
    • 1.Qe6+?
      • 1...Sxe6
        • 2.Sc4#
      • 1...Qxe6+!
  • Keys
    • 1.Qf7!
      • threat
        • 2.Sc4#
      • 1...Qxf7+
        • 2.Sxf7#
      • 1...d5
        • 2.Qc7#
      • 1...Rg2
        • 2.Sxf3#
      • 1...Sd5
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • Q(l);CHECK,XQ(E)::S(B),XQ(l)
    • Q(l);N_GUARD::S(I),XQ(l)
    • R(c);N_GUARD,P_PINS(B),S_CUTB(a)::S(I),XP(b)
    • S(i);N_PINQ(E),N_SPINR(e)::QAB1(E)
  • Tries
    • Try
      • R(C);CHECK,N_PINR(e),N_SPINQ(E)
      • Vars
        • S(i);XR(C)::QAB1(E)
        • P(g);XR(C)::QAB1(E)
      • Refutation
        • Q(l);P_PINQ(E),XR(C)
    • Try
      • Q(E);CHECK
      • Vars
        • S(k);XQ(E)::S(B)
      • Refutation
        • Q(l);CHECK,XQ(E)
  • Actual
    • Q(E);
    • Threat
      • S(B)
    • Vars
      • Q(l);CHECK,XQ(E)::S(I),XQ(l)
      • P(h);N_PINQ(E),N_SPINR(e)::QAB(E)
      • R(c);N_GUARD,P_PINS(B),S_CUTB(a)::S(I),XP(b)
      • S(i);N_PINQ(E),N_SPINR(e)::QAR1(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).