MESON Chess Problem Database

Problem Display
PID: 173052 (nB2N3/2r2r2/1p2P3/1Qb1k3/2PNpRn1/q1P3P1/8/1b2R1K1 w - - 0 1)

Barulin, Mikhail Mikhailovich

1st Comm., Tambovskaya Pravda, 1930

nB2N3/2r2r2/1p2P3/1Qb1k3/2PNpRn1/q1P3P1/8/1b2R1K1

#2

11 + 10

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rf5
      • 2.Rxf5#
    • 1...Rd7
      • 2.Rf5#
    • 1...Re7
      • 2.Rf5#
    • 1...Rg7
      • 2.Rf5#
    • 1...Rh7
      • 2.Rf5#
    • 1...Ba2
      • 2.Rexe4#
      • 2.Rfxe4#
    • 1...Sf6
      • 2.Rf5#
  • Tries
    • 1.Bxc7+?
      • 1...Rxc7
        • 2.Rf5#
      • 1...Sxc7!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Qd5#
      • 1...Bxd4+
        • 2.cxd4#
      • 1...Rxd7
        • 2.Rf5#
      • 1...Bd6
        • 2.Sf3#
      • 1...Se3
        • 2.Sc6#
      • 1...Sf6
        • 2.Rf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • R(i);N_GUARD::R1(G),XR(i)
    • R(i);N_GUARD::R1(G)
    • S(d);S_CUTR(i)::R1(G)
  • Tries
    • Try
      • B(J);CHECK,XR(h)
      • Vars
        • R(i);XB(J)::R1(G)
      • Refutation
        • S(j);XB(J)
  • Actual
    • Q(H);N_PINB(e)
    • Threat
      • QAR1(H)
    • Vars
      • B(e);CHECK,OGATE,XS(F)::P(C),XB(e)
      • R(i);N_GUARD,XQ(H)::R1(G)
      • B(e);N_PINS(F),N_SPINR(h)::S(F)
      • S(d);N_PINS(F),N_SPINP(c)::S(F)
      • S(d);S_CUTR(i)::R1(G)
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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).