MESON Chess Problem Database

Problem Display
PID: 172444 (3K4/rk6/1N6/p7/8/8/8/1R3Q2 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kuban segodniya, 1997

3K4/rk6/1N6/p7/8/8/8/1R3Q2

#2

4 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Sd7+?
      • 1...Ka8
        • 2.Rb8#
      • 1...Kc6!
    • 1.Sc8+?
      • 1...Kc6
        • 2.Qc4#
        • 2.Qb5#
      • 1...Ka8!
    • 1.Qg2+?
      • 1...Kb8
        • 2.Sd7#
      • 1...Ka6!
    • 1.Qh1+?
      • 1...Kb8
        • 2.Sd7#
      • 1...Ka6!
    • 1.Qf3+?
      • 1...Kb8
        • 2.Sd7#
      • 1...Ka6!
  • Keys
    • 1.Qc4!
      • threat
        • 2.Qc8#
      • 1...Ra8+
        • 2.Sc8#
      • 1...Kb8
        • 2.Qc8#
      • 1...Ra6
        • 2.Qc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT::R1(A)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • S(C);CHECK
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);P-FLIGHT::R(A)+S(C),DCHECK
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);P-FLIGHT::R(A)+S(C),DCHECK
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);P-FLIGHT::R(A)+S(C),DCHECK
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(B);
    • Threat
      • QAB1(B)
    • Vars
      • R(b);CHECK,SBLOCK::R(A)+S(C)
      • K(c);P-FLIGHT::QAR1(B)
      • R(b);SBLOCK::QAR1(B)
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