MESON Chess Problem Database

Problem Display
PID: 240452 (4bk2/4pp1K/8/8/8/8/Q7/1B6 w - - 0 1)

Parkhomenko, Nikolai A

Problemist Pribuzhya, 1992

4bk2/4pp1K/8/8/8/8/Q7/1B6

#2

3 + 4

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...e5
      • 2.Qa3#
    • 1...e6
      • 2.Qa3#
    • 1...f5
      • 2.Qg8#
    • 1...f6
      • 2.Qg8#
  • Tries
    • 1.Qa1?
      • threat
        • 2.Qg7#
        • 2.Qh8#
      • 1...Ba4
        • 2.Qh8#
      • 1...Bb5
        • 2.Qh8#
      • 1...Bc6
        • 2.Qh8#
      • 1...Bd7
        • 2.Qh8#
      • 1...e5
        • 2.Qa3#
      • 1...e6
        • 2.Qa3#
      • 1...f5
        • 2.Qg7#
      • 1...f6!
    • 1.Qb2?
      • threat
        • 2.Qg7#
        • 2.Qh8#
      • 1...Ba4
        • 2.Qh8#
      • 1...Bb5
        • 2.Qh8#
      • 1...Bc6
        • 2.Qh8#
      • 1...Bd7
        • 2.Qh8#
      • 1...e5
        • 2.Qa3#
        • 2.Qb4#
      • 1...e6
        • 2.Qa3#
        • 2.Qb4#
      • 1...f5
        • 2.Qg7#
      • 1...f6!
  • Keys
    • 1.Bg6!
      • 1...fxg6
        • 2.Qg8#
      • 1...Ba4
        • 2.Qxf7#
      • 1...Bb5
        • 2.Qxf7#
      • 1...Bc6
        • 2.Qxf7#
      • 1...Bd7
        • 2.Qxf7#
      • 1...e5
        • 2.Qa3#
      • 1...e6
        • 2.Qa3#
      • 1...f5
        • 2.Qg8#
      • 1...f6
        • 2.Qg8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • P(a);OGATEB::QAB(B)
    • P(b);OGATE::QAR1(B)
  • Tries
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • B(c);::QAR2(B)
        • P(a);OGATEB::QAB(B)
        • P(b);::QAB1(B)
      • Refutation
        • P(b);
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • B(c);::QAR2(B)
        • P(b);::QAB1(B)
      • Refutation
        • P(b);
  • Actual
    • B(A);
    • Vars
      • P(b);OGATE,XB(A)::QAR1(B)
      • B(c);N_GUARD::QAR1(B),XP(b)
      • P(a);OGATEB::QAB(B)
      • P(b);OGATE::QAR1(B)
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