MESON Chess Problem Database

Problem Display
PID: 112961 (4b1q1/6p1/8/3kNpN1/5p2/B1P5/K3Q3/8 w - - 0 1)

Maximov, Nikolai J

La Presse, 1899

4b1q1/6p1/8/3kNpN1/5p2/B1P5/K3Q3/8

#2

6 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bb5
      • 2.Qxb5#
    • 1...Bh5
      • 2.Qb5#
    • 1...Bg6
      • 2.Qb5#
    • 1...Bf7
      • 2.Qb5#
  • Tries
    • 1.Qf2?
      • threat
        • 2.Qd4#
        • 2.Qc5#
      • 1...Qf8
        • 2.Qd4#
      • 1...Kxe5+!
    • 1.Qe3?
      • threat
        • 2.Qd4#
        • 2.Qc5#
        • 2.c4#
      • 1...Qf8
        • 2.Qd4#
        • 2.c4#
      • 1...Bb5
        • 2.Qd4#
        • 2.Qc5#
      • 1...fxe3!
  • Keys
    • 1.Qb2!
      • threat
        • 2.c4#
      • 1...Kxe5+
        • 2.c4#
      • 1...Bb5
        • 2.Qxb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • B(e);N_GUARD::QAR2(B),XB(e)
    • B(e);N_GUARD::QAR2(B)
  • Tries
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • Q(f);::QAR1(B)
      • Refutation
        • K(b);CHECK,P-FLIGHT,XS(E)
    • Try
      • Q(B);
      • Threat
        • DUALS(3)
      • Refutation
        • P(a);XQ(B)
  • Actual
    • Q(B);
    • Threat
      • P(D)
    • Vars
      • K(b);CHECK,P-FLIGHT,XS(E)::QAB(B)+P(D)
      • B(e);N_GUARD::QAR2(B),XB(e)
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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).