MESON Chess Problem Database

Problem Display
PID: 172463 (8/8/pp6/k1p5/8/K7/8/1Q6 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kuban segodniya, 1999

8/8/pp6/k1p5/8/K7/8/1Q6

#2

2 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...c4
      • 2.Qb4#
  • Tries
    • 1.Qc2?
      • threat
        • 2.Qa4#
      • 1...Kb5
        • 2.Qa4#
      • 1...b5!
    • 1.Qd3?
      • 1...b5
        • 2.Qd8#
      • 1...c4!
    • 1.Qb2?
      • 1...c4
        • 2.Qb4#
      • 1...b5!
  • Keys
    • 1.Qd1!
      • threat
        • 2.Qa4#
      • 1...Kb5
        • 2.Qa4#
      • 1...b5
        • 2.Qd8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • P(b);N_GUARD::QAB1(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • K(a);P-FLIGHT::QAB1(A)
      • Refutation
        • P(d);
    • Try
      • Q(A);
      • Vars
        • P(d);OGATEB,SBLOCK::QAB(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Vars
        • P(b);N_GUARD::QAB1(A)
      • Refutation
        • P(d);
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • K(a);P-FLIGHT::QAB1(A)
      • P(d);OGATEB,SBLOCK::QAB(A)
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