MESON Chess Problem Database

Problem Display
PID: 144195 (B7/b2nQb2/4p2r/Rq2k3/1NpNppPp/2P5/3R2n1/B5K1 w - - 0 1)

Barulin, Mikhail Mikhailovich

Magyar Sakkvilag, 1930

B7/b2nQb2/4p2r/Rq2k3/1NpNppPp/2P5/3R2n1/B5K1

#2

10 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qd5
      • 2.Sc6#
      • 2.Rxd5#
    • 1...Bxd4+
      • 2.cxd4#
    • 1...Bb8
      • 2.Sdc6#
    • 1...Bg6
      • 2.Qxe6#
    • 1...Se3
      • 2.Sdc6#
    • 1...Sb6
      • 2.Sdc6#
    • 1...Sf6
      • 2.Qc7#
    • 1...e3
      • 2.Sf3#
  • Tries
    • 1.Rxb5+?
      • 1...Sc5
        • 2.Sdc6#
      • 1...Bc5!
  • Keys
    • 1.Re2!
      • threat
        • 2.Rxe4#
      • 1...Bxd4+
        • 2.cxd4#
      • 1...Qd5
        • 2.Sc6#
        • 2.Rxd5#
      • 1...Bg6
        • 2.Qxe6#
      • 1...Se3
        • 2.Sdc6#
      • 1...Sc5
        • 2.Sf3#
      • 1...Sf6
        • 2.Qc7#
      • 1...e3
        • 2.Sf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • B(j);CHECK,OGATE,XS(F)::P(D),XB(j)
    • B(j);N_PINS(F)::S(F)
    • B(l);N_GUARD,S_CUTR(i)::QAR1(I),XP(h)
    • S(a);N_PINS(F)::S(F)
    • S(k);N_PINS(F)::S(F)
    • S(k);OGATE,SBLOCK::QAB(I)
    • P(c);N_PINS(F)::S(F)
  • Tries
    • Try
      • R(H);CHECK,XQ(f)
      • Vars
        • S(k);N_PINS(F),P_SPINS(k)::S(F)
      • Refutation
        • B(j);P_SPINB(j)
  • Actual
    • R(C);N_PINP(h),P_PINP(c)
    • Threat
      • R1(C),XP(c)
    • Vars
      • B(j);CHECK,OGATE,XS(F)::P(D),XB(j)
      • B(l);N_GUARD,S_CUTR(i)::QAR1(I),XP(h)
      • S(a);N_PINS(F),N_SPINP(c),P_SPINP(h)::S(F)
      • S(k);N_PINS(F),N_SPINQ(f)::S(F)
      • S(k);OGATE,SBLOCK::QAB(I)
      • P(c);N_PINS(F)::S(F)
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).