MESON Chess Problem Database

Problem Display
PID: 206595 (Q2N4/3pR3/3p4/4nk1K/2P5/4P2P/5PP1/8 w - - 0 1)

Neunivako, Pavel Efimovich

64 Shakhmatnoe obozrenie, 1925

Q2N4/3pR3/3p4/4nk1K/2P5/4P2P/5PP1/8

#2

9 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sf3
      • 2.Qxf3#
    • 1...Sxc4
      • 2.Qf3#
    • 1...Sg4
      • 2.Qf3#
    • 1...Sf7
      • 2.Qf3#
  • Tries
    • 1.g4+?
      • 1...Sxg4
        • 2.Qf3#
      • 1...Kf6!
  • Keys
    • 1.Qa1!
      • 1...Ke4
        • 2.Qb1#
      • 1...Kf6
        • 2.Rf7#
      • 1...Sxc4
        • 2.g4#
      • 1...Sd3
        • 2.g4#
      • 1...Sf3
        • 2.g4#
      • 1...Sg4
        • 2.hxg4#
      • 1...Sc6
        • 2.g4#
      • 1...Sg6
        • 2.g4#
      • 1...Sf7
        • 2.g4#
      • 1...d5
        • 2.Qxe5#

There are these versions: 206596

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 4
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAR2(H),XS(a)
    • S(a);N_GUARD,XP(E)::QAR2(H)
    • S(a);N_GUARD::QAR2(H)
  • Tries
    • Try
      • P(B);CHECK
      • Vars
        • S(a);XP(B)::QAR2(H)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(H);
    • Vars
      • K(b);P_SPINS(a),S_FLIGHT::QAB(H)
      • K(b);P-FLIGHT,P_SPINS(a)::R1(G)
      • S(a);N_GUARD,XP(E)::P(B)
      • S(a);N_GUARD::P(B)
      • S(a);OGATE::P(D),XS(a)
      • P(c);N_GUARD::QAR1(H),XS(a)
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).