MESON Chess Problem Database

Problem Display
PID: 228878 (3N2Q1/K1p1Rq1r/2Pp3b/2pkP2p/2Np3r/1P1P4/8/8 w - - 0 1)

Cristoffanini, Guido

Chess Amateur (The), 1926

3N2Q1/K1p1Rq1r/2Pp3b/2pkP2p/2Np3r/1P1P4/8/8

#2

9 + 10

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qe6
      • 2.Qxe6#
    • 1...Rh8
      • 2.Qxf7#
    • 1...Bf4
      • 2.Qg2#
    • 1...Bg7
      • 2.Qxf7#
    • 1...dxe5
      • 2.Rxe5#
      • 2.Rd7#
  • Tries
    • 1.Qg2+?
      • 1...Re4
        • 2.Qxe4#
        • 2.dxe4#
      • 1...Qf3!
  • Keys
    • 1.exd6!
      • threat
        • 2.Re5#
      • 1...cxd6
        • 2.Sb6#
      • 1...Qe6
        • 2.Qxe6#
      • 1...Re4
        • 2.dxe4#
      • 1...Bf4
        • 2.Qg2#
      • 1...Bg7
        • 2.Qxf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(i);OGATE::QAB1(I),XQ(i)
    • R(j);N_GUARD::QAB(I),XQ(i)
    • B(g);S_CUTR(b)::QAB(I)
    • B(g);S_CUTR(j)::QAB(I),XQ(i)
  • Tries
    • Try
      • Q(I);CHECK,N_PINQ(i)
      • Refutation
        • Q(i);P_SPINQ(i)
  • Actual
    • P(D);XP(f)
    • Threat
      • R1(G)
    • Vars
      • P(h);N_GUARD,P_PINR(G),SBLOCK,XP(D)::S(C)
      • Q(i);OGATE::QAB1(I),XQ(i)
      • R(b);OGATE::P(B),XR(b)
      • B(g);S_CUTR(b)::QAB(I)
      • B(g);S_CUTR(j)::QAB(I),XQ(i)
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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).