MESON Chess Problem Database

Problem Display
PID: 158523 (1b1R2r1/2qb3B/2p2B2/2N1PnR1/1PPk2Np/1P1p3K/3P4/8 w - - 0 1)

Popovski, Aleksandr

1st Place, Match: Bosnia & Herzegovina - Macedonia, 1956-1957

1b1R2r1/2qb3B/2p2B2/2N1PnR1/1PPk2Np/1P1p3K/3P4/8

#2

12 + 9

56 The Problemist 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Qd6
      • 2.exd6#
    • 1...Se3
      • 2.Se6#
    • 1...Sg3
      • 2.Se6#
    • 1...Sd6
      • 2.exd6#
      • 2.e6#
    • 1...Sh6
      • 2.Se6#
    • 1...Se7
      • 2.Se6#
  • Tries
    • 1.Sf2?
      • threat
        • 2.Se6#
      • 1...Sd6+
        • 2.e6#
      • 1...Sg7+
        • 2.Rg4#
      • 1...Rxd8
        • 2.Rg4#
      • 1...Qd6
        • 2.exd6#
      • 1...Re8
        • 2.Rg4#
      • 1...Qxd8!
    • 1.Rxd7+?
      • 1...Qd6
        • 2.exd6#
        • 2.e6#
      • 1...Sd6
        • 2.Se6#
        • 2.exd6#
        • 2.e6#
      • 1...Qxd7!
  • Keys
    • 1.Sh2!
      • threat
        • 2.Sf3#
      • 1...Se3+
        • 2.Se6#
      • 1...Sg3+
        • 2.Se6#
      • 1...Sd6+
        • 2.e6#
      • 1...Sh6+
        • 2.Se6#
      • 1...Se7+
        • 2.Se6#
      • 1...Sg7+
        • 2.Rg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(f);N_SPINB(g),OGATE::B(J)+P(H),XQ(f)
    • S(d);P_PINS(F)::S(G)
  • Tries
    • Try
      • S(F);
      • Threat
        • S(G)
      • Vars
        • S(d);CHECK,N_SPINB(g),S_CUTQ(f)::B(J)+P(H)
        • S(d);CHECK,S_CUTR(i)::R(I)
        • R(i);N_GUARD,N_SPINB(g),XR(L)::R(I)
        • Q(f);N_SPINB(g),OGATE::B(J)+P(H),XQ(f)
        • R(i);N_GUARD::R(I)
      • Refutation
        • Q(f);N_SPINB(g),XR(L)
    • Try
      • R(L);CHECK,XB(g)
      • Refutation
        • Q(f);XR(L)
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • S(d);CHECK::S(G)
      • S(d);CHECK,N_SPINB(g),S_CUTQ(f)::B(J)+P(H)
      • S(d);CHECK,S_CUTR(i)::R(I)
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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).