MESON Chess Problem Database

Problem Display
PID: 12333 (k7/P7/1B2p3/2K2b2/2Q5/8/8/8 w - - 0 1)

Petrovic, Nenad

9th Place, Match: USSR - Yugoslavia, 1976-1977

k7/P7/1B2p3/2K2b2/2Q5/8/8/8

#2

4 + 3

2012 Miniature Chess Problems from Many Countries 1981
2838 Fun with Chess Miniatures 1996
3713 Snap 2009
145 StrateGems 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Bh3
      • 2.Qe4#
    • 1...Be4
      • 2.Qxe4#
    • 1...Bg4
      • 2.Qe4#
    • 1...e5
      • 2.Qd5#
  • Tries
    • 1.Kb4?
      • threat
        • 2.Qc6#
        • 2.Qc8#
      • 1...Be4
        • 2.Qxe4#
        • 2.Qc8#
      • 1...e5
        • 2.Qd5#
        • 2.Qc6#
      • 1...Kb7!
    • 1.Kb5?
      • threat
        • 2.Qc6#
        • 2.Qc8#
      • 1...Kb7
        • 2.Qc6#
      • 1...Be4
        • 2.Qxe4#
        • 2.Qc8#
      • 1...e5
        • 2.Qd5#
        • 2.Qc6#
      • 1...Bd3!
    • 1.Kd6?
      • threat
        • 2.Qc6#
        • 2.Qc8#
      • 1...Be4
        • 2.Qxe4#
        • 2.Qc8#
      • 1...e5
        • 2.Qd5#
        • 2.Qc6#
      • 1...Kb7!
  • Keys
    • 1.Qa4!
      • threat
        • 2.Qc6#
      • 1...Kb7
        • 2.a8Q#
      • 1...Be4
        • 2.Qxe4#

Anticipated by 125406(0000)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • B(a);N_GUARD::QAB(A)
    • B(a);N_GUARD::QAB(A),XB(a)
    • P(b);N_GUARD::QAB(A)
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Threat
        • DUALS(2)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • K(B);P-FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • K(c);S_FLIGHT::QAB1(A)
      • Refutation
        • B(a);P_PINQ(A)
    • Try
      • K(B);S_FLIGHT
      • Threat
        • DUALS(2)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • K(c);OGATE,S_FLIGHT::P=Q
      • B(a);N_GUARD::QAB(A),XB(a)
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