MESON Chess Problem Database

Problem Display
PID: 204519 (n2N3b/1Bp5/8/P1k1q3/3N4/K2P4/1P5Q/3b2B1 w - - 0 1)

Neunivako, Pavel Efimovich

1st Prize, 64 Shakhmatnoe obozrenie, 1925

n2N3b/1Bp5/8/P1k1q3/3N4/K2P4/1P5Q/3b2B1

#2

9 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qd6
      • 2.b4#
    • 1...Qf6
      • 2.b4#
    • 1...Qg7
      • 2.S8e6#
      • 2.b4#
    • 1...Qe2
      • 2.b4#
    • 1...Qe4
      • 2.b4#
    • 1...Qd5
      • 2.b4#
    • 1...Qf5
      • 2.b4#
    • 1...Qg5
      • 2.S8e6#
      • 2.b4#
    • 1...Qh5
      • 2.S8e6#
      • 2.b4#
    • 1...Qe6
      • 2.S8xe6#
      • 2.b4#
    • 1...Qe7
      • 2.b4#
    • 1...Qe8
      • 2.b4#
  • Tries
    • 1.S8e6+?
      • 1...Qxe6
        • 2.b4#
      • 1...Kd6!
  • Keys
    • 1.Bc6!
      • threat
        • 2.Sb7#
      • 1...Kd6
        • 2.Sf5#
      • 1...Qxd4
        • 2.b4#
      • 1...Qe3
        • 2.S4e6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • Q(c);::P(B)
  • Tries
    • Try
      • S(I);CHECK
      • Vars
        • Q(c);XS(I)::P(B)
      • Refutation
        • K(b);P_SPINQ(c),S_FLIGHT
  • Actual
    • B(H);
    • Threat
      • S(I)
    • Vars
      • K(b);P_SPINQ(c),S_FLIGHT::S(F)
      • Q(c);P_SPINQ(c),XS(F)::P(B)
      • Q(c);P_PINP(E)::S(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).