MESON Chess Problem Database

Problem Display
PID: 103771 (7K/R2pp3/4k3/6Q1/8/8/8/B7 w - - 0 1)

Shakhnazaryan, Albert Serapionovic

Shak-M, 1989

7K/R2pp3/4k3/6Q1/8/8/8/B7

#2

4 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kf7
      • 2.Qg8#
    • 1...d5
      • 2.Qg6#
    • 1...d6
      • 2.Rxe7#
  • Tries
    • 1.Kg7?
      • threat
        • 2.Qe5#
      • 1...d6
        • 2.Rxe7#
      • 1...Kd6!
    • 1.Kh7?
      • 1...Kf7
        • 2.Qg8#
      • 1...d5
        • 2.Qg6#
      • 1...d6
        • 2.Rxe7#
      • 1...Kd6!
    • 1.Kg8?
      • threat
        • 2.Qe5#
      • 1...d6
        • 2.Rxe7#
      • 1...Kd6!
    • 1.Bb2?
      • 1...Kf7
        • 2.Qg8#
      • 1...d5
        • 2.Qg6#
      • 1...d6
        • 2.Rxe7#
      • 1...Kd6!
    • 1.Bc3?
      • 1...Kf7
        • 2.Qg8#
      • 1...d5
        • 2.Qg6#
      • 1...d6
        • 2.Rxe7#
      • 1...Kd6!
    • 1.Bd4?
      • 1...Kf7
        • 2.Qg8#
      • 1...d5
        • 2.Qg6#
      • 1...d6
        • 2.Rxe7#
      • 1...Kd6!
    • 1.Ra5?
      • threat
        • 2.Qd5#
        • 2.Qg6#
      • 1...Kf7
        • 2.Qg8#
      • 1...d5
        • 2.Qxd5#
      • 1...d6
        • 2.Qf5#
      • 1...Kd6!
    • 1.Ra6+?
      • 1...Kf7
        • 2.Qg8#
      • 1...d6!
    • 1.Rb7?
      • 1...Kf7
        • 2.Qg8#
      • 1...d6
        • 2.Rxe7#
      • 1...d5
        • 2.Qg6#
      • 1...Kd6!
    • 1.Rxd7?
      • threat
        • 2.Qd5#
      • 1...Kf7
        • 2.Qg8#
      • 1...Kxd7!
  • Keys
    • 1.Rc7!
      • 1...Kd6
        • 2.Qe5#
      • 1...Kf7
        • 2.Qg8#
      • 1...d6
        • 2.Rxe7#
      • 1...d5
        • 2.Qg6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAB1(B)
    • P(b);SBLOCK::QAR2(B)
    • P(b);OGATE,SBLOCK::R1(C),XP(c)
  • Tries
    • Try
      • K(D);S_FLIGHT
      • Threat
        • QAR1(B)
      • Vars
        • P(b);OGATE,SBLOCK::R1(C),XP(c)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • K(D);P-FLIGHT
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
        • P(b);SBLOCK::QAR2(B)
        • P(b);OGATE,SBLOCK::R1(C),XP(c)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • K(D);P-FLIGHT
      • Threat
        • QAR1(B)
      • Vars
        • P(b);OGATE,SBLOCK::R1(C),XP(c)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • B(A);
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
        • P(b);SBLOCK::QAR2(B)
        • P(b);OGATE,SBLOCK::R1(C),XP(c)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • B(A);
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
        • P(b);SBLOCK::QAR2(B)
        • P(b);OGATE,SBLOCK::R1(C),XP(c)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • B(A);
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
        • P(b);SBLOCK::QAR2(B)
        • P(b);OGATE,SBLOCK::R1(C),XP(c)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(C);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
        • P(b);::QAB1(B),XP(b)
        • P(b);SBLOCK::QAB1(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(C);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
      • Refutation
        • P(b);P_SPINP(b)
    • Try
      • R(C);
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
        • P(b);OGATE,SBLOCK::R1(C),XP(c)
        • P(b);SBLOCK::QAR2(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(C);XP(b)
      • Threat
        • QAB1(B)
      • Vars
        • K(a);P_SPINP(c),S_FLIGHT::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT,XR(C)
  • Actual
    • R(C);
    • Vars
      • K(a);P-FLIGHT::QAB1(B)
      • K(a);S_FLIGHT::QAB1(B)
      • P(b);OGATE,SBLOCK::R1(C),XP(c)
      • P(b);SBLOCK::QAR2(B)
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