MESON Chess Problem Database

Problem Display
PID: 75227 (8/1q2R3/np1pNpK1/2p1p2p/Qb2kNR1/2P2p2/3P4/1b6 w - - 0 1)

Mosiashvili, Givi

1st Comm., StrateGems, 2007

8/1q2R3/np1pNpK1/2p1p2p/Qb2kNR1/2P2p2/3P4/1b6

#2

8 + 12

145 StrateGems 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ba2
      • 2.Qc2#
    • 1...Bc2
      • 2.Qxc2#
    • 1...f5
      • 2.Sg5#
  • Tries
    • 1.Qb3?
      • threat
        • 2.Qc4#
        • 2.Qxb1#
      • 1...Bxc3
        • 2.Qxb1#
      • 1...exf4
        • 2.Sxc5#
      • 1...Qd5
        • 2.Qxd5#
      • 1...Ba2
        • 2.Qc2#
      • 1...Bc2
        • 2.Qxc2#
        • 2.Qc4#
      • 1...Bd3
        • 2.Sxh5#
      • 1...c4
        • 2.Qxc4#
        • 2.Qxb1#
      • 1...b5
        • 2.Qxb1#
      • 1...d5
        • 2.Qxb1#
      • 1...f2!
  • Keys
    • 1.Qb5!
      • threat
        • 2.Qc4#
      • 1...Bxc3
        • 2.Qxb1#
      • 1...exf4
        • 2.Sc7#
      • 1...f2
        • 2.Qe2#
      • 1...Qd5
        • 2.Sxh5#
      • 1...Ba2
        • 2.Qd3#
      • 1...Bd3
        • 2.Qxd3#
      • 1...c4
        • 2.Qxc4#
      • 1...d5
        • 2.Sxh5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 7
    • REMOVED MATES = 2
  • Sets
    • B(a);N_GUARD::QAB(C)
    • B(a);N_GUARD::QAB(C),XB(a)
    • P(k);N_GUARD::S(F)
  • Tries
    • Try
      • Q(C);N_PINB(c)
      • Threat
        • DUALS(2)
      • Vars
        • B(c);XP(B)::QAB(C),XB(a)
        • P(f);P_SPINP(f),XS(D)::R(H)+S(F),DCHECK,XP(e)
        • Q(l);N_GUARD::QAB1(C),XQ(l)
        • B(a);N_GUARD::QAB(C)
        • B(a);SBLOCK::R(E)+S(D),XP(g)
        • P(i);::QAB(C),XB(a)
        • P(j);::QAB(C),XB(a)
      • Refutation
        • P(b);
  • Actual
    • Q(C);N_PINB(c)
    • Threat
      • QAR2(C)
    • Vars
      • B(c);OGATE,XP(B)::QAB(C),XB(a)
      • P(f);P_SPINP(f),XS(D)::R(H)+S(F)
      • P(b);N_GUARD::QAR2(C)
      • Q(l);SBLOCK::R(E)+S(D),XP(g)
      • B(a);N_GUARD::QAB1(C)
      • B(a);N_GUARD::QAB1(C),XB(a)
      • P(e);::QAR2(C),XP(e)
      • P(j);SBLOCK::R(E)+S(D),XP(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).