MESON Chess Problem Database

Problem Display
PID: 15496 (2R5/1p6/pk6/8/2K5/4R3/Q7/8 w - - 0 1)

Parkhomenko, Nikolai A

Shakhmaty v SSSR, 1984

2R5/1p6/pk6/8/2K5/4R3/Q7/8

#2

4 + 3

3296 Shakhmatny zadachi miniaturi 1987

SOLUTION

  • SOUND
  • Tries
    • 1.Kb4?
      • 1...a5+
        • 2.Qxa5#
      • 1...Ka7!
    • 1.Re5?
      • threat
        • 2.Qf2#
      • 1...a5
        • 2.Qxa5#
      • 1...Ka7!
    • 1.Re7?
      • 1...Ka7
        • 2.Qf2#
      • 1...a5!
    • 1.Rc5?
      • 1...a5
        • 2.Qxa5#
      • 1...Ka7!
    • 1.Qb1+?
      • 1...Ka5
        • 2.Ra3#
        • 2.Qb4#
      • 1...Ka7!
    • 1.Qb3+?
      • 1...Ka5
        • 2.Qb4#
      • 1...Ka7!
    • 1.Qb2+?
      • 1...Ka5
        • 2.Ra3#
        • 2.Qb4#
      • 1...Ka7!
  • Keys
    • 1.Qf2!
      • threat
        • 2.Ra3#
        • 2.Re5#
      • 1...Ka5
        • 2.Ra3#
      • 1...Ka7
        • 2.Re7#
      • 1...a5
        • 2.Re6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(C);P-FLIGHT
      • Vars
        • P(a);CHECK::QAB1(A),XP(a)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT
    • Try
      • R(B);
      • Threat
        • QAB(A)
      • Vars
        • P(a);::QAB1(A),XP(a)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT
    • Try
      • R(B);
      • Vars
        • K(b);P_SPINP(a),S_FLIGHT::QAB(A)
      • Refutation
        • P(a);
    • Try
      • R(D);
      • Vars
        • P(a);::QAB1(A),XP(a)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT
    • Try
      • Q(A);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(A);
    • Threat
      • DUALS(2)
    • Vars
      • K(b);S_FLIGHT::R(B)
      • K(b);S_FLIGHT::QAB(A)+R(B)
      • P(a);SBLOCK::QAB(A)+R(B),DCHECK
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