MESON Chess Problem Database

Problem Display
PID: 159491 (Q7/8/8/ppp5/k7/3R4/1K6/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Bankovskaya gazeta, 1996

Q7/8/8/ppp5/k7/3R4/1K6/8

#2

3 + 4

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...b4
      • 2.Qc6#
      • 2.Qe8#
  • Tries
    • 1.Rb3?
      • 1...b4
        • 2.Qc6#
        • 2.Qe8#
      • 1...c4!
    • 1.Qe4+?
      • 1...b4
        • 2.Qc6#
        • 2.Qe8#
      • 1...c4!
    • 1.Qd5?
      • threat
        • 2.Qb3#
      • 1...Kb4
        • 2.Qb3#
      • 1...b4
        • 2.Qc6#
        • 2.Qd7#
      • 1...c4!
    • 1.Qg8?
      • threat
        • 2.Qb3#
      • 1...Kb4
        • 2.Qb3#
      • 1...b4
        • 2.Qe8#
      • 1...c4!
  • Keys
    • 1.Qf8!
      • 1...Kb4
        • 2.Rd4#
      • 1...c4
        • 2.Ra3#
        • 2.Qa3#
      • 1...b4
        • 2.Qe8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(B);
      • Refutation
        • P(d);
    • Try
      • Q(C);CHECK,N_PINP(b)
      • Refutation
        • P(d);P_SPINP(d)
    • Try
      • Q(C);N_PINP(b)
      • Threat
        • QAB1(C)
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
      • Refutation
        • P(d);
    • Try
      • Q(C);N_PINP(b)
      • Threat
        • QAB1(C)
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
        • P(c);OGATEB,SBLOCK::QAB(C)
      • Refutation
        • P(d);
  • Actual
    • Q(C);N_PINP(b)
    • Vars
      • K(a);P-FLIGHT,P_SPINP(d)::R(B)
      • P(c);OGATEB,SBLOCK::QAB(C)
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