MESON Chess Problem Database

Problem Display
PID: 263300 (b2n4/1B6/2qP1p2/5Kp1/3Q2N1/2N1pk2/4p3/3n2R1 w - - 0 1)

Banny, Dimitry Nikolaevich

5th HM., Szachy, 1972

b2n4/1B6/2qP1p2/5Kp1/3Q2N1/2N1pk2/4p3/3n2R1

#2

7 + 9

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4+
      • 2.Qxe4#
    • 1...Qd5+
      • 2.Qxd5#
    • 1...Sb2
      • 2.Qxe3#
    • 1...Sf2
      • 2.Sh2#
      • 2.Qxe3#
    • 1...Sxc3
      • 2.Qxe3#
  • Tries
    • 1.Bxc6+?
      • 1...Sxc6
        • 2.Qe4#
        • 2.Qd5#
      • 1...Bxc6!
  • Keys
    • 1.Qxf6!
      • threat
        • 2.Ke5#
        • 2.Kxg5#
        • 2.Kg6#
      • 1...Qe4+
        • 2.Kxg5#
      • 1...Qd5+
        • 2.Kg6#
      • 1...Sxc3
        • 2.Ke5#
      • 1...Se6
        • 2.Kxe6#
      • 1...Sf7
        • 2.Ke6#
        • 2.Kg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • Q(f);CHECK,N_GUARD::QAB1(C),XQ(f)
    • Q(f);CHECK,N_GUARD::QAB(C),XQ(f)
    • S(a);N_GUARD::QAR1(C),XP(c)
    • S(a);N_GUARD,XS(B)::QAR1(C),XP(c)
  • Tries
    • Try
      • B(G);CHECK,XQ(f)
      • Refutation
        • B(h);XB(G)
  • Actual
    • Q(C);XP(g)
    • Threat
      • DUALS(3)
    • Vars
      • Q(f);CHECK::QAR(C)+K(E),XP(e)
      • Q(f);CHECK::QAR(C)+K(E)
      • S(a);XS(B)::QAR(C)+K(E)
      • S(i);::QAR(C)+K(E),XS(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).