MESON Chess Problem Database

Problem Display
PID: 86903 (6R1/3N4/4k3/8/7P/B2K1P2/8/7Q w - - 0 1)

Shakhnazaryan, Albert Serapionovic

Vdovenko, Alelsei

Pat a Mat, 2000

6R1/3N4/4k3/8/7P/B2K1P2/8/7Q

#2

7 + 1

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Qc1?
      • 1...Kd5
        • 2.Qc4#
      • 1...Kxd7
        • 2.Qc8#
      • 1...Kf7
        • 2.Qc4#
      • 1...Kf5!
    • 1.Qe1+?
      • 1...Kd5
        • 2.Qe4#
      • 1...Kf5
        • 2.Qe4#
        • 2.Qe5#
      • 1...Kf7
        • 2.Qe8#
      • 1...Kxd7!
    • 1.f4?
      • 1...Kf5
        • 2.Qe4#
      • 1...Kf7
        • 2.Qd5#
      • 1...Kxd7!
  • Keys
    • 1.Qh2!
      • 1...Kd5
        • 2.Qd6#
      • 1...Kf5
        • 2.Qe5#
      • 1...Kxd7
        • 2.Qd6#
      • 1...Kf7
        • 2.Qa2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
        • K(a);OGATEB,S_FLIGHT,XS(F)::QAB1(A)
        • K(a);S_FLIGHT::QAB(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
        • K(a);OGATE,S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT,XS(F)
    • Try
      • P(D);
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
        • K(a);S_FLIGHT::QAB(A)
      • Refutation
        • K(a);S_FLIGHT,XS(F)
  • Actual
    • Q(A);
    • Vars
      • K(a);S_FLIGHT::QAR1(A)
      • K(a);S_FLIGHT,XS(F)::QAR1(A)
      • K(a);S_FLIGHT::QAB(A)
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