MESON Chess Problem Database

Problem Display
PID: 172224 (1K2R3/8/2k5/1p6/4N3/8/4n3/4Q3 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kuban segodniya, 1996

1K2R3/8/2k5/1p6/4N3/8/4n3/4Q3

#2

4 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kb6
      • 2.Re6#
  • Tries
    • 1.Rd8?
      • threat
        • 2.Rd6#
      • 1...Kb6
        • 2.Rd6#
      • 1...b4!
    • 1.Qc3+?
      • 1...Kd5
        • 2.Re5#
        • 2.Qc5#
      • 1...Kb6
        • 2.Re6#
      • 1...Kd7
        • 2.Qc8#
      • 1...Sxc3!
  • Keys
    • 1.Qb4!
      • threat
        • 2.Qd6#
      • 1...Kd5
        • 2.Qc5#
      • 1...Kb6
        • 2.Re6#
      • 1...Kd7
        • 2.Qxb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(c);P-FLIGHT::R(D)
  • Tries
    • Try
      • R(D);
      • Threat
        • R1(D)
      • Vars
        • K(c);P-FLIGHT::R(D)
      • Refutation
        • P(b);
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);P-FLIGHT::R(D)
        • K(c);OGATE,S_FLIGHT::QAB1(A)
      • Refutation
        • S(a);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • K(c);S_FLIGHT::QAR1(A)
      • K(c);P-FLIGHT,P_SPINP(b)::R(D)
      • K(c);S_FLIGHT::QAB(A),XP(b)
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