MESON Chess Problem Database

Problem Display
PID: 199833 (8/8/8/4N3/2p1k3/5NK1/8/Q6R w - - 0 1)

Akimov, Nikolai Nikolaevich

Die Schwalbe, 2019

8/8/8/4N3/2p1k3/5NK1/8/Q6R

#2

5 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Ke3
      • 2.Re1#
      • 2.Qe1#
  • Tries
    • 1.Rh6?
      • 1...Ke3
        • 2.Qe1#
      • 1...Kd5
        • 2.Qd4#
      • 1...Kf5
        • 2.Qb1#
      • 1...c3!
    • 1.Qb1+?
      • 1...Ke3
        • 2.Re1#
        • 2.Qe1#
      • 1...Kd5!
    • 1.Qd1?
      • 1...Ke3
        • 2.Re1#
        • 2.Qe1#
      • 1...c3
        • 2.Qd3#
      • 1...Kf5!
    • 1.Qa4?
      • 1...Ke3
        • 2.Re1#
      • 1...Kd5
        • 2.Qc6#
      • 1...Kf5!
    • 1.Qa8+?
      • 1...Ke3
        • 2.Re1#
      • 1...Kf5!
  • Keys
    • 1.Qa6!
      • 1...Ke3
        • 2.Re1#
      • 1...Kd5
        • 2.Qc6#
      • 1...Kf5
        • 2.Qg6#
      • 1...c3
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(B);
      • Vars
        • K(b);P-FLIGHT::QAR2(A)
        • K(b);S_FLIGHT::QAR1(A)
        • K(b);S_FLIGHT::QAB(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • P(a);N_GUARD::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);P_PINP(a)
      • Vars
        • K(b);N_SPINP(a),P-FLIGHT::R(B)
        • K(b);N_SPINP(a),S_FLIGHT::QAB1(A)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::R(B)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(b);P-FLIGHT::R(B)
      • K(b);S_FLIGHT::QAB1(A)
      • P(a);OGATE::QAB1(A)
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