MESON Chess Problem Database

Problem Display
PID: 103619 (n7/p2N2b1/P1k5/1N6/2P1n1BQ/8/2K5/8 w - - 0 1)

Keirans, Peteris

3rd HM., USSR Team Championship, 1947

n7/p2N2b1/P1k5/1N6/2P1n1BQ/8/2K5/8

#2

7 + 5

14752 Soviet Chess Compositions (1945-1947) 1949
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Qe7?
      • threat
        • 2.Qxe4#
      • 1...Sd2
        • 2.Qc5#
        • 2.Qd6#
        • 2.Qe6#
      • 1...Sf2
        • 2.Qc5#
        • 2.Qd6#
        • 2.Qe6#
      • 1...Sc3
        • 2.Qc5#
        • 2.Qd6#
        • 2.Qe6#
      • 1...Sg3
        • 2.Qc5#
        • 2.Qd6#
        • 2.Qe6#
      • 1...Sc5
        • 2.Qxc5#
        • 2.Qd6#
      • 1...Sg5
        • 2.Qc5#
        • 2.Qd6#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Sf6
        • 2.Qc5#
        • 2.Qd6#
        • 2.Qe6#
      • 1...Sb6
        • 2.Sb8#
      • 1...Sc7
        • 2.Sxa7#
      • 1...Be5!
  • Keys
    • 1.Qd8!
      • threat
        • 2.Qxa8#
      • 1...Sc5
        • 2.Sb8#
      • 1...Sd6
        • 2.Sxa7#
      • 1...Sb6
        • 2.Qc7#
      • 1...Sc7
        • 2.Qxc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(D);
      • Threat
        • QAB(D),XS(a)
      • Vars
        • S(a);N_GUARD::QAR1(D),XS(a)
        • S(e);SBLOCK::S(G)
        • S(e);SBLOCK::S(E),XP(c)
      • Refutation
        • B(d);
  • Actual
    • Q(D);
    • Threat
      • QAB(D),XS(e)
    • Vars
      • S(a);SBLOCK::S(G)
      • S(a);SBLOCK::S(E),XP(c)
      • S(e);N_GUARD::QAR1(D)
      • S(e);N_GUARD::QAR1(D),XS(e)
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