MESON Chess Problem Database

Problem Display
PID: 167091 (k7/p1K5/2p5/1P6/3p4/8/8/3Q4 w - - 0 1)

Dzektser, Abram L

2nd HM., Prapor peremogi, 1989

k7/p1K5/2p5/1P6/3p4/8/8/3Q4

#2

3 + 4

145 StrateGems 2016
5454 Near Snap 2019
3713 Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...cxb5
      • 2.Qf3#
      • 2.Qh1#
    • 1...c5
      • 2.Qf3#
      • 2.Qh1#
  • Tries
    • 1.Qe1?
      • threat
        • 2.Qe8#
      • 1...a5
        • 2.Qxa5#
      • 1...a6!
  • Keys
    • 1.Qa1!
      • 1...cxb5
        • 2.Qh1#
      • 1...a5
        • 2.Qxa5#
      • 1...a6
        • 2.Qxa6#
      • 1...d3
        • 2.Qh8#
      • 1...c5
        • 2.Qh1#

Anticipated by 193730(1916)

This anticipates 247930(2006)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR(A)
      • Vars
        • P(c);OGATEB::QAR(A),XP(c)
      • Refutation
        • P(c);
  • Actual
    • Q(A);P_PINP(c)
    • Vars
      • P(b);OGATEB,XP(B)::QAB(A)
      • P(c);OGATEB::QAR(A),XP(c)
      • P(c);OGATEB::QAR2(A),XP(c)
      • P(a);OGATE::QAB1(A)
      • P(b);OGATEB::QAB(A)
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