MESON Chess Problem Database

Problem Display
PID: 10806 (1B6/3B1p2/q7/3p1P2/3p1Pk1/p6R/2Q1P2K/8 w - - 0 1)

Banny, Dimitry Nikolaevich

4th Prize, Shakhmaty, 1968-1969

1B6/3B1p2/q7/3p1P2/3p1Pk1/p6R/2Q1P2K/8

#2

8 + 6

4655 Michael Keller Ein Meister der Schachkomposition 1994
145 StrateGems 2008
702 Phenix 2009
5454 Near Snap 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe2+
      • 2.Qxe2#
    • 1...Qc4
      • 2.f6#
    • 1...Qa5
      • 2.f6#
    • 1...Qh6
      • 2.f6#
    • 1...Qa8
      • 2.f6#
  • Tries
    • 1.e3?
      • threat
        • 2.Qg2#
      • 1...Qe2+
        • 2.Qxe2#
      • 1...Qf1
        • 2.f6#
      • 1...Qe6!
    • 1.e4?
      • threat
        • 2.Qg2#
      • 1...Qe2+
        • 2.Qxe2#
      • 1...Qd3
        • 2.f6#
      • 1...Qf1
        • 2.f6#
      • 1...Qd6!
  • Keys
    • 1.Qd1!
      • threat
        • 2.Qg1#
      • 1...Qxe2+
        • 2.Qxe2#
      • 1...Qd6
        • 2.e3#
      • 1...Qe6
        • 2.e4#
      • 1...Qd3
        • 2.exd3#

This anticipates 164929(2016)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • Q(e);CHECK,OGATE,XP(B)::QAB(A),XQ(e)
    • Q(e);N_GUARD::B(G)+P(F)
    • Q(e);N_GUARD,P_PINR(D)::B(G)+P(F)
  • Tries
    • Try
      • P(B);
      • Threat
        • QAR2(A)
      • Vars
        • Q(e);CHECK,N_GUARD::QAB(A),XQ(e)
        • Q(e);N_GUARD::B(G)+P(F)
      • Refutation
        • Q(e);
    • Try
      • P(B);
      • Threat
        • QAR2(A)
      • Vars
        • Q(e);CHECK,N_GUARD::QAB(A),XQ(e)
        • Q(e);N_GUARD::B(G)+P(F)
      • Refutation
        • Q(e);P_PINP(E)
  • Actual
    • Q(A);
    • Threat
      • QAR(A)
    • Vars
      • Q(e);CHECK,OGATE,P_SPINQ(e),XP(B)::QAB(A),XQ(e)
      • Q(e);N_GUARD,P_PINP(E)::QAB(A)+P(B)
      • Q(e);N_GUARD::QAB(A)+P(B)
      • Q(e);OGATE::QAB(A)+P(B),XQ(e)
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).