MESON Chess Problem Database

Problem Display
PID: 42542 (2N4B/b1q1n3/1nppk2p/7Q/1P3RP1/rb3NK1/4B3/4R3 w - - 0 1)

Barulin, Mikhail Mikhailovich

Golubev, Giorgi P

1st Prize, 64 Shakhmatnoe obozrenie, 1931

2N4B/b1q1n3/1nppk2p/7Q/1P3RP1/rb3NK1/4B3/4R3

#2

10 + 10

56 The Problemist 2009
133 The Problemist Supplement 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qd7
      • 2.Sd4#
      • 2.Bd1#
      • 2.Bf1#
      • 2.Bd3#
      • 2.Bc4#
      • 2.Bb5#
      • 2.Ba6#
      • 2.Re4#
      • 2.Rf6#
      • 2.Qf7#
    • 1...Sd7
      • 2.Bc4#
      • 2.Qf7#
    • 1...Sd5
      • 2.Qf5#
    • 1...Sf5+
      • 2.Qxf5#
    • 1...Sg6
      • 2.Qf5#
    • 1...Sg8
      • 2.Qf5#
    • 1...c5
      • 2.Bb5#
  • Keys
    • 1.Qe8!
      • threat
        • 2.Bc4#
      • 1...Kd5
        • 2.Qf7#
      • 1...Bc4
        • 2.Bxc4#
      • 1...Bd5
        • 2.Rf6#
      • 1...Sc4
        • 2.Bxc4#
      • 1...Sd5
        • 2.Re4#
      • 1...d5
        • 2.Sd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 5
  • Sets
    • S(j);N_GUARD::QAB1(H)
    • S(j);CHECK,N_GUARD::QAB1(H),XS(j)
    • P(d);::R(A)+B(B)
  • Actual
    • Q(H);P_PINS(j)
    • Threat
      • R(A)+B(B),DCHECK
    • Vars
      • K(f);N_SPINS(j),S_FLIGHT::QAB(H)
      • B(b);P_PINS(C)::R(A)+B(B),DCHECK,XB(b)
      • B(b);P_PINS(C),SBLOCK::R1(F)
      • S(c);::R(A)+B(B),DCHECK,XS(c)
      • S(c);SBLOCK::R(F)
      • P(e);P_PINR(F),SBLOCK::S(C)
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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).