MESON Chess Problem Database

Problem Display
PID: 32531 (7q/p3p3/4p3/2R2n1B/3Pk2p/3r1N1K/2QbP1N1/2n5 w - - 0 1)

Neunivako, Pavel Efimovich

2nd Prize, De Problemist, 1928

7q/p3p3/4p3/2R2n1B/3Pk2p/3r1N1K/2QbP1N1/2n5

#2

8 + 10

20 De Problemist 1929

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5
      • 2.Rxe5#
    • 1...Qxh5
      • 2.Re5#
    • 1...Qh6
      • 2.Re5#
    • 1...Qh7
      • 2.Re5#
    • 1...Qa8
      • 2.Re5#
    • 1...Qc8
      • 2.Re5#
    • 1...Qd8
      • 2.Re5#
    • 1...Qe8
      • 2.Re5#
    • 1...Qf8
      • 2.Re5#
    • 1...Qg8
      • 2.Re5#
    • 1...Sa2
      • 2.Qxd3#
      • 2.exd3#
    • 1...Sb3
      • 2.Qxd3#
      • 2.exd3#
    • 1...Sg7
      • 2.Re5#
  • Keys
    • 1.Qa4!
      • threat
        • 2.Qc6#
      • 1...Rxf3+
        • 2.Bxf3#
      • 1...Qxd4
        • 2.Re5#
      • 1...Rxd4
        • 2.Sxd2#
      • 1...Sxd4
        • 2.Bg6#
      • 1...Qe5
        • 2.Rxe5#
      • 1...Qa8
        • 2.Re5#
      • 1...Qc8
        • 2.Re5#
      • 1...Qd8
        • 2.Re5#
      • 1...Qe8
        • 2.Re5#
      • 1...Se3
        • 2.Sg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 6
  • Sets
    • Q(j);N_GUARD::R1(G),XQ(j)
    • Q(j);N_GUARD,XB(H)::R1(G)
    • Q(j);N_GUARD::R1(G)
    • S(f);S_CUTQ(j)::R1(G)
  • Actual
    • Q(A);N_PINR(c)
    • Threat
      • QAB(A)
    • Vars
      • R(c);CHECK,OGATE,XS(D)::B(H),XR(c)
      • Q(j);N_GUARD,P_SPINQ(j),XP(F)::R1(G)
      • R(c);N_PINS(D),P_SPINR(c),XP(F)::S(D),XB(b)
      • S(f);OGATEB,P_SPINS(f),XP(F)::B(H)
      • Q(j);N_GUARD::R1(G),XQ(j)
      • Q(j);N_GUARD::R1(G)
      • S(f);N_PINS(D)::S(D)
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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).