MESON Chess Problem Database

Problem Display
PID: 70095 (2R5/4kp2/8/3K1P2/8/4B3/8/3Q4 w - - 0 1)

Melnichuk, Aleksandr Nikolaevich

Zhuk, Aleksandr Gnatovich

StrateGems, 2006

2R5/4kp2/8/3K1P2/8/4B3/8/3Q4

#2

5 + 2

5454 Near Snap 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Kc6?
      • threat
        • 2.Qd6#
        • 2.Qd8#
      • 1...f6
        • 2.Qd7#
      • 1...Kf6!
    • 1.Qc2?
      • 1...Kd7
        • 2.Qc7#
      • 1...f6
        • 2.Qc7#
      • 1...Kf6!
    • 1.Qb3?
      • 1...Kd7
        • 2.Qb7#
      • 1...f6
        • 2.Qb7#
      • 1...Kf6!
    • 1.Qa4?
      • 1...f6
        • 2.Qe8#
        • 2.Qa7#
      • 1...Kf6!
    • 1.Qh5?
      • 1...Kf6
        • 2.Qg5#
      • 1...f6
        • 2.Qe8#
        • 2.Qh7#
      • 1...Kd7!
    • 1.Qa1?
      • 1...f6
        • 2.Qa7#
      • 1...Kd7!
    • 1.Qb1?
      • 1...Kd7
        • 2.Qb7#
      • 1...f6
        • 2.Qb7#
      • 1...Kf6!
    • 1.Qc1?
      • 1...Kd7
        • 2.Qc7#
      • 1...f6
        • 2.Qc7#
      • 1...Kf6!
    • 1.Qg1?
      • 1...Kf6
        • 2.Qg5#
      • 1...f6
        • 2.Qg7#
      • 1...Kd7!
    • 1.Qd4?
      • 1...f6
        • 2.Qa7#
      • 1...Kd7!
    • 1.f6+?
      • 1...Kd7
        • 2.Qg4#
      • 1...Kxf6!
  • Keys
    • 1.Qg4!
      • 1...Kf6
        • 2.Qg5#
      • 1...Kd7
        • 2.f6#
      • 1...f6
        • 2.Qg7#

Anticipated by 76985(1948)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • P(b);SBLOCK::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
        • P(b);SBLOCK::QAR2(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
        • P(b);SBLOCK::QAR(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • P(b);SBLOCK::QAR(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
        • P(b);SBLOCK::QAR(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
        • P(b);SBLOCK::QAR2(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
        • P(b);OGATEB::QAR2(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • P(b);SBLOCK::QAR(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • P(D);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB(A)
      • Refutation
        • K(a);S_FLIGHT,XP(D)
  • Actual
    • Q(A);
    • Vars
      • K(a);S_FLIGHT::QAB1(A)
      • K(a);P-FLIGHT::QAB(A)+P(D)
      • P(b);OGATEB::QAR2(A)
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