MESON Chess Problem Database

Problem Display
PID: 172466 (r7/8/2p5/k7/P7/1QK5/8/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kuban segodniya, 1999

r7/8/2p5/k7/P7/1QK5/8/8

#2

3 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Ra6
      • 2.Qb4#
    • 1...c5
      • 2.Qb5#
  • Tries
    • 1.Qb6+?
      • 1...Kxa4
        • 2.Qb4#
      • 1...Kxb6!
  • Keys
    • 1.Qb7!
      • 1...Kxa4
        • 2.Qb4#
      • 1...Ra7
        • 2.Qxa7#
      • 1...Ra6
        • 2.Qb4#
      • 1...Rb8
        • 2.Qa7#
      • 1...Rc8
        • 2.Qa7#
      • 1...Rd8
        • 2.Qa7#
      • 1...Re8
        • 2.Qa7#
      • 1...Rf8
        • 2.Qa7#
      • 1...Rg8
        • 2.Qa7#
      • 1...Rh8
        • 2.Qa7#
      • 1...c5
        • 2.Qb5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • R(c);SBLOCK::QAB1(A)
    • P(b);N_GUARD::QAR1(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT,XP(C)::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT,XQ(A)
  • Actual
    • Q(A);
    • Vars
      • K(a);P-FLIGHT,XP(C)::QAR1(A)
      • R(c);N_GUARD::QAR2(A),XR(c)
      • R(c);SBLOCK::QAB1(A)
      • R(c);N_GUARD::QAR2(A)
      • P(b);N_GUARD::QAR1(A)
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