MESON Chess Problem Database

Problem Display
PID: 179036 (1rq5/8/3B4/b3Np2/5K2/rkP4R/1N3p2/1Q3B2 w - - 0 1)

Cristoffanini, Guido

Magasinet, 1933

1rq5/8/3B4/b3Np2/5K2/rkP4R/1N3p2/1Q3B2

#2

8 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qb7
      • 2.Bc4#
    • 1...Qd7
      • 2.Bc4#
    • 1...Qxc3
      • 2.Bc4#
    • 1...Qc4+
      • 2.Bxc4#
    • 1...Qd8
      • 2.Bc4#
    • 1...Qe8
      • 2.Bc4#
    • 1...Qf8
      • 2.Bc4#
    • 1...Qh8
      • 2.Bc4#
    • 1...Ra4+
      • 2.Sbc4#
    • 1...Rb4+
      • 2.c4#
    • 1...Bc7
      • 2.Bc4#
      • 2.c4#
    • 1...Bd8
      • 2.c4#
  • Tries
    • 1.Sc6?
      • threat
        • 2.Sd4#
        • 2.Bc4#
      • 1...Ra4+
        • 2.Sc4#
      • 1...Rb4+
        • 2.cxb4#
        • 2.c4#
      • 1...Qa6
        • 2.Sd4#
      • 1...Qe6
        • 2.Sd4#
      • 1...Qg8
        • 2.Sd4#
      • 1...Qh8
        • 2.Bc4#
      • 1...Bb6
        • 2.Bc4#
      • 1...Qxc6!
  • Keys
    • 1.Sec4!
      • threat
        • 2.Sd2#
      • 1...Qxc4+
        • 2.Bxc4#
      • 1...Ra4
        • 2.Sd1#
      • 1...Rb4
        • 2.cxb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 8
  • Sets
    • Q(g);N_GUARD::B(B)
    • Q(g);N_GUARD,P_SPINQ(g),XP(D)::B(B)
    • Q(g);CHECK,N_GUARD::B(B),XQ(g)
    • R(b);CHECK,SBLOCK::QAR(A)+S(C)
    • R(f);CHECK,S_CUTB(d)::R(E)+P(D)
    • B(d);N_GUARD::R(E)+P(D)
  • Tries
    • Try
      • S(G);
      • Threat
        • DUALS(2)
      • Vars
        • R(b);CHECK,SBLOCK::QAR(A)+S(C)
        • Q(g);::S(G)
        • Q(g);::B(B)
        • B(d);::B(B)
      • Refutation
        • Q(g);XS(G)
  • Actual
    • S(G);
    • Threat
      • S(G)
    • Vars
      • Q(g);CHECK,OGATE,XS(G)::B(B),XQ(g)
      • R(b);P_PINS(G),SBLOCK::QAR(A)+S(C)
      • R(f);OGATE,P_PINS(G)::R(E)+P(D),XR(f)
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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).