MESON Chess Problem Database

Problem Display
PID: 159941 (8/3B4/8/3pp3/4kp2/8/3K4/3Q4 w - - 0 1)

Andreev, Aleksandr Grigorevich

Bankovskaya gazeta, 1996

8/3B4/8/3pp3/4kp2/8/3K4/3Q4

#2

3 + 4

15148 Sadier Collection 2017
5454 Near Snap 2019

SOLUTION

  • SOUND
  • Tries
    • 1.Qa4+?
      • 1...d4
        • 2.Qc6#
        • 2.Qa8#
      • 1...Kf3!
    • 1.Qg4?
      • 1...d4
        • 2.Bc6#
      • 1...Kd4!
    • 1.Qh5?
      • 1...f3
        • 2.Qg4#
        • 2.Qh4#
      • 1...d4
        • 2.Bc6#
      • 1...Kd4!
    • 1.Qb1+?
      • 1...Kd4
        • 2.Qb4#
      • 1...Kf3!
    • 1.Qh1+?
      • 1...f3
        • 2.Qh4#
      • 1...Kd4!
  • Keys
    • 1.Qb3!
      • threat
        • 2.Qd3#
      • 1...Kd4
        • 2.Qb4#
      • 1...f3
        • 2.Qe3#
      • 1...d4
        • 2.Qb7#

Anticipated by 198987(1945)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);P_PINP(b)
      • Vars
        • P(c);OGATEB,SBLOCK::B(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • P(c);OGATEB,SBLOCK::B(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • P(b);OGATEB,P_SPINP(b),SBLOCK::QAR(A)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • K(a);P-FLIGHT::QAR2(A)
      • P(b);N_GUARD::QAR1(A)
      • P(c);OGATEB,SBLOCK::QAB(A)
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