MESON Chess Problem Database

Problem Display
PID: 15766 (4Q3/8/8/8/1k1N4/1P6/8/R3K1B1 w Q - 0 1)

Chaiko, V

Shakhmaty v SSSR, 1987

4Q3/8/8/8/1k1N4/1P6/8/R3K1B1

#2

6 + 1

3296 Shakhmatny zadachi miniaturi 1987
2786 More Fun with Chess Miniatures 2000
136 Problem Observer 2008
145 StrateGems 2016

SOLUTION

  • SOUND
  • Tries
    • 1.Rc1?
      • threat
        • 2.Qa4#
      • 1...Ka5
        • 2.Qb5#
      • 1...Ka3!
    • 1.Ra4+?
      • 1...Kc5
        • 2.Qc6#
      • 1...Kc3!
    • 1.Ra5?
      • 1...Kxa5
        • 2.Qb5#
      • 1...Kc3!
    • 1.Ra6?
      • 1...Kc5
        • 2.Qb5#
      • 1...Kc3!
    • 1.Qd7?
      • 1...Kc5
        • 2.Sc2#
      • 1...Kc3!
    • 1.Qe2?
      • threat
        • 2.Qc4#
      • 1...Kc3
        • 2.Qd2#
      • 1...Kc5!
    • 1.Qb8+?
      • 1...Kc5
        • 2.Ra5#
      • 1...Kc3!
  • Keys
    • 1.0-0-0!
      • 1...Ka3
        • 2.Qa4#
      • 1...Kc3
        • 2.Qe1#
      • 1...Ka5
        • 2.Qb5#
      • 1...Kc5
        • 2.Sc2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(A);
      • Threat
        • QAR1(F)
      • Vars
        • K(a);S_FLIGHT::QAR1(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(A);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(A);
      • Vars
        • K(a);S_FLIGHT,XR(A)::QAR1(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(A);
      • Vars
        • K(a);S_FLIGHT::QAR1(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);
      • Vars
        • K(a);S_FLIGHT::B(C)+S(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);
      • Threat
        • QAR1(F)
      • Vars
        • K(a);S_FLIGHT::QAB1(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(a);S_FLIGHT::R(A)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • K(B);0-0-0
    • Vars
      • K(a);S_FLIGHT::QAR1(F)
      • K(a);S_FLIGHT::QAB(F)
      • K(a);S_FLIGHT::B(C)+S(E)
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