MESON Chess Problem Database

Problem Display
PID: 269909 (r3k3/b7/p3K3/4B3/8/8/8/Q7 w q - 0 1)

Kovalenko, V?

Shakhmatnaya kompozitsiya, 1997

r3k3/b7/p3K3/4B3/8/8/8/Q7

#2

3 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...0-0-0
      • 2.Qxa6#
  • Tries
    • 1.Bd6?
      • threat
        • 2.Qh8#
      • 1...Kd8
        • 2.Qh8#
      • 1...0-0-0
        • 2.Qxa6#
      • 1...Bd4!
    • 1.Qa3?
      • threat
        • 2.Qe7#
      • 1...Kd8
        • 2.Qf8#
      • 1...0-0-0
        • 2.Qxa6#
      • 1...Bc5!
    • 1.Qa4+?
      • 1...Kd8
        • 2.Qd7#
      • 1...Kf8!
  • Keys
    • 1.Qh1!
      • threat
        • 2.Qh8#
      • 1...Kd8
        • 2.Qh8#
      • 1...Kf8
        • 2.Qh8#
      • 1...0-0-0
        • 2.Qc6#
      • 1...Bc5
        • 2.Qxa8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(d);0-0-0,OGATEB::QAB(A),XP(a)
  • Tries
    • Try
      • B(B);
      • Threat
        • QAR(A)
      • Vars
        • K(d);P-FLIGHT::QAR(A)
        • K(d);0-0-0,OGATEB::QAB(A),XP(a)
      • Refutation
        • B(b);
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • K(d);N_GUARD,P-FLIGHT::QAR2(A)
        • K(d);0-0-0,OGATEB::QAB(A),XP(a)
      • Refutation
        • B(b);
    • Try
      • Q(A);CHECK
      • Vars
        • K(d);N_GUARD,P-FLIGHT::QAR1(A)
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAR(A)
    • Vars
      • K(d);P-FLIGHT::QAR(A)
      • K(d);P-FLIGHT::QAR2(A)
      • K(d);0-0-0,N_GUARD::QAR2(A)
      • B(b);N_GUARD::QAR(A),XR(c)
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