MESON Chess Problem Database

Problem Display
PID: 227519 (4Q3/2Rb1P1B/8/pp1P1N2/3P4/3k3K/2N2P2/1nb1B3 w - - 0 1)

Cristoffanini, Guido

L'Echiquier, 1926

4Q3/2Rb1P1B/8/pp1P1N2/3P4/3k3K/2N2P2/1nb1B3

#2

11 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bb2
      • 2.Qe3#
    • 1...Ba3
      • 2.Qe3#
    • 1...Be3
      • 2.Qxe3#
    • 1...Bxf5+
      • 2.Bxf5#
    • 1...Bc6
      • 2.Sd6#
    • 1...Bxe8
      • 2.Sg3#
    • 1...Sd2
      • 2.Qe3#
    • 1...Sa3
      • 2.Rc3#
    • 1...Sc3
      • 2.Rxc3#
    • 1...a4
      • 2.Sb4#
  • Tries
    • 1.Qe6?
      • threat
        • 2.Sg3#
        • 2.Sh4#
        • 2.Sd6#
        • 2.Sh6#
        • 2.Se7#
        • 2.Sg7#
      • 1...Be3
        • 2.Sg3#
        • 2.Qxe3#
      • 1...Bc6
        • 2.Sd6#
      • 1...Sc3
        • 2.Rxc3#
      • 1...Bh6
        • 2.Sg3#
        • 2.Sh4#
        • 2.Sd6#
        • 2.Sxh6#
        • 2.Se7#
        • 2.Sg7#
      • 1...Sd2
        • 2.Qe3#
      • 1...Bxe6!
  • Keys
    • 1.f3!
      • threat
        • 2.Qe4#
      • 1...Bxf5+
        • 2.Bxf5#
      • 1...Bxe8
        • 2.Sg3#
      • 1...Be3
        • 2.Qxe3#
      • 1...Bc6
        • 2.Sd6#
      • 1...Be6
        • 2.Qxb5#
      • 1...Sc3
        • 2.Rxc3#
      • 1...Sd2
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • B(b);N_GUARD::QAR1(K)
    • B(b);N_GUARD::QAR1(K),XB(b)
    • B(f);CHECK,OGATE,P_SPINB(f),XS(G)::B(J),XB(f)
    • B(f);N_PINS(G)::B(J)+S(G)
    • B(f);N_PINS(G),XQ(K)::B(J)+S(G)
    • S(a);S_CUTB(b)::QAR1(K)
    • S(a);N_GUARD::R1(H)
    • S(a);N_GUARD::R1(H),XS(a)
    • P(d);N_GUARD::S(B)
  • Tries
    • Try
      • Q(K);N_SPINS(G)
      • Threat
        • DUALS(6)
      • Vars
        • B(f);::B(J)+S(G)
        • S(a);N_GUARD::R1(H),XS(a)
        • S(a);S_CUTB(b)::QAR1(K)
      • Refutation
        • B(f);P_PINS(G),XQ(K)
  • Actual
    • P(C);
    • Threat
      • QAB1(K)
    • Vars
      • B(f);CHECK,OGATE,P_SPINB(f),XS(G)::B(J),XB(f)
      • B(f);N_PINS(G),XQ(K)::B(J)+S(G)
      • B(b);N_GUARD::QAR1(K),XB(b)
      • B(f);N_PINS(G)::B(J)+S(G)
      • B(f);OGATE::QAB(K),XP(e)
      • S(a);N_GUARD::R1(H),XS(a)
      • S(a);S_CUTB(b)::QAR1(K)
HTML5 logo

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).