MESON Chess Problem Database

Problem Display
PID: 159218 (8/8/2K5/kp6/p7/8/3PB3/4Q3 w - - 0 1)

Andreev, Aleksandr Grigorevich

Bankovskaya gazeta, 1996

8/8/2K5/kp6/p7/8/3PB3/4Q3

#2

4 + 3

15148 Sadier Collection 2016
5454 Near Snap 2017

SOLUTION

  • SOUND
  • Tries
    • 1.Qg3?
      • 1...Kb4
        • 2.Qc3#
      • 1...a3
        • 2.Qxa3#
      • 1...b4
        • 2.Qe5#
        • 2.Qc7#
        • 2.Qg5#
      • 1...Ka6!
    • 1.Qh4?
      • 1...Ka6
        • 2.Qxa4#
      • 1...b4
        • 2.Qg5#
        • 2.Qd8#
        • 2.Qh5#
      • 1...a3!
    • 1.Qb1?
      • threat
        • 2.Qxb5#
      • 1...b4
        • 2.Qf5#
      • 1...Ka6!
    • 1.Qc1?
      • 1...Kb4
        • 2.Qc3#
      • 1...a3
        • 2.Qxa3#
      • 1...b4
        • 2.Qc5#
      • 1...Ka6!
  • Keys
    • 1.Qa1!
      • 1...Kb4
        • 2.Qc3#
      • 1...Ka6
        • 2.Qxa4#
      • 1...a3
        • 2.Qxa3#
      • 1...b4
        • 2.Qe5#

Anticipated by 11699(1971), 99076(1990)

This anticipates 247013(1998)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Vars
        • K(b);S_FLIGHT::QAB1(A)
        • P(a);OGATEB::QAR2(A),XP(a)
      • Refutation
        • K(b);P-FLIGHT,P_SPINP(c)
    • Try
      • Q(A);
      • Vars
        • K(b);P-FLIGHT,P_SPINP(c)::QAR2(A),XP(a)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XP(c)
      • Vars
        • P(c);OGATEB,SBLOCK::QAR(A)
      • Refutation
        • K(b);P-FLIGHT,P_SPINP(c)
    • Try
      • Q(A);
      • Vars
        • K(b);S_FLIGHT::QAB1(A)
        • P(a);OGATEB::QAR2(A),XP(a)
        • P(c);OGATEB::QAR2(A)
      • Refutation
        • K(b);P-FLIGHT,P_SPINP(c)
  • Actual
    • Q(A);P_PINP(a)
    • Vars
      • K(b);N_SPINP(a),S_FLIGHT::QAB1(A)
      • K(b);P-FLIGHT::QAR2(A),XP(a)
      • P(a);OGATEB::QAR2(A),XP(a)
      • P(c);OGATEB,SBLOCK::QAR(A)
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