MESON Chess Problem Database

Problem Display
PID: 172341 (b2K4/8/2kp4/5Q2/8/8/8/6B1 w - - 0 1)

Andreev, Aleksandr Grigorevich

Vecherni Krasnodar, 1996

b2K4/8/2kp4/5Q2/8/8/8/6B1

#2

3 + 3

6490 yacpdb 2018
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kb7
      • 2.Qc8#
      • 2.Qb5#
    • 1...d5
      • 2.Qd7#
  • Tries
    • 1.Kc8?
      • 1...d5
        • 2.Qd7#
      • 1...Bb7+!
    • 1.Bf2?
      • 1...Kb7
        • 2.Qc8#
        • 2.Qb5#
      • 1...d5
        • 2.Qd7#
      • 1...Bb7!
    • 1.Be3?
      • 1...Kb7
        • 2.Qc8#
        • 2.Qb5#
      • 1...d5
        • 2.Qd7#
      • 1...Bb7!
    • 1.Bd4?
      • 1...Kb7
        • 2.Qc8#
        • 2.Qb5#
      • 1...d5
        • 2.Qd7#
      • 1...Bb7!
    • 1.Qe6?
      • 1...Kb7
        • 2.Qc8#
      • 1...Bb7
        • 2.Qc4#
      • 1...Kb5!
    • 1.Qf1?
      • 1...Kb7
        • 2.Qb5#
      • 1...Bb7
        • 2.Qc4#
      • 1...d5
        • 2.Qa6#
      • 1...Kd5!
    • 1.Qa5?
      • 1...Kb7
        • 2.Qb6#
        • 2.Qb5#
      • 1...d5
        • 2.Qb6#
        • 2.Qa6#
      • 1...Bb7!
    • 1.Qc5+?
      • 1...Kb7
        • 2.Qb6#
        • 2.Qb5#
        • 2.Qc8#
      • 1...dxc5!
    • 1.Qf7?
      • 1...d5
        • 2.Qd7#
      • 1...Bb7
        • 2.Qc4#
      • 1...Kb5!
  • Keys
    • 1.Qd3!
      • 1...Kb7
        • 2.Qb5#
      • 1...d5
        • 2.Qa6#
      • 1...Bb7
        • 2.Qc4#

Anticipated by 110689(1956)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(b);::QAB1(B)
  • Tries
    • Try
      • K(C);P-FLIGHT
      • Vars
        • P(b);::QAB1(B)
      • Refutation
        • B(c);CHECK
    • Try
      • B(A);
      • Vars
        • P(b);::QAB1(B)
      • Refutation
        • B(c);
    • Try
      • B(A);
      • Vars
        • P(b);::QAB1(B)
      • Refutation
        • B(c);
    • Try
      • B(A);
      • Vars
        • P(b);::QAB1(B)
      • Refutation
        • B(c);
    • Try
      • Q(B);P_PINP(b)
      • Vars
        • K(a);N_SPINP(b),S_FLIGHT::QAB1(B)
        • B(c);SBLOCK::QAR2(B)
      • Refutation
        • K(a);N_SPINP(b),S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);S_FLIGHT::QAR2(B)
        • B(c);SBLOCK::QAR2(B)
        • P(b);SBLOCK::QAR2(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Refutation
        • B(c);
    • Try
      • Q(B);CHECK
      • Refutation
        • P(b);XQ(B)
    • Try
      • Q(B);
      • Vars
        • P(b);::QAB1(B)
        • B(c);SBLOCK::QAR2(B)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(B);
    • Vars
      • K(a);S_FLIGHT::QAR2(B)
      • P(b);SBLOCK::QAR2(B)
      • B(c);SBLOCK::QAR2(B)
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