MESON Chess Problem Database

Problem Display
PID: 149246 (3B4/8/5NK1/1Q1pk3/8/8/1P6/8 w - - 0 1)

Boronin, Boris

Kudesnik, 1995

3B4/8/5NK1/1Q1pk3/8/8/1P6/8

#2

5 + 2

15148 Sadier Collection 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Kd6
      • 2.Qxd5#
    • 1...Ke6
      • 2.Qxd5#
  • Tries
    • 1.Kg5?
      • threat
        • 2.Qxd5#
      • 1...Kd6
        • 2.Qxd5#
      • 1...Ke6
        • 2.Qxd5#
      • 1...Kd4!
    • 1.Bc7+?
      • 1...Ke6
        • 2.Qe2#
        • 2.Qd7#
        • 2.Qe8#
      • 1...Kd4!
    • 1.Qe2+?
      • 1...Kd4
        • 2.Bb6#
      • 1...Kf4
        • 2.Sh5#
        • 2.Bc7#
      • 1...Kd6!
    • 1.Qd3?
      • 1...Kf4
        • 2.Bc7#
      • 1...Kd6
        • 2.Qxd5#
      • 1...Ke6
        • 2.Qxd5#
      • 1...d4!
    • 1.Qc4?
      • 1...Kd6
        • 2.Qxd5#
      • 1...Ke6
        • 2.Qxd5#
      • 1...d4
        • 2.Bc7#
      • 1...dxc4!
    • 1.Qc6?
      • 1...Kd4
        • 2.Qc3#
      • 1...d4
        • 2.Bc7#
      • 1...Kf4!
    • 1.Qb4?
      • 1...Ke6
        • 2.Qe7#
      • 1...d4!
    • 1.Qa5?
      • 1...Kd4
        • 2.Qc3#
      • 1...Kd6
        • 2.Qxd5#
      • 1...Ke6
        • 2.Qxd5#
      • 1...Kf4!
    • 1.Qc5?
      • 1...Ke6
        • 2.Qe7#
        • 2.Qxd5#
      • 1...Kf4!
  • Keys
    • 1.Qb3!
      • 1...Kd4
        • 2.Qc3#
      • 1...Kf4
        • 2.Bc7#
      • 1...Kd6
        • 2.Qxd5#
      • 1...Ke6
        • 2.Qxd5#
      • 1...d4
        • 2.Bc7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(b);N_SPINP(a),S_FLIGHT::QAR1(B),XP(a)
    • K(b);N_SPINP(a),P-FLIGHT::QAB1(B),XP(a)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Threat
        • QAR1(B),XP(a)
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT::QAR1(B),XP(a)
        • K(b);N_SPINP(a),P-FLIGHT::QAB1(B),XP(a)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
    • Try
      • B(E);CHECK
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
    • Try
      • Q(B);CHECK,N_PINP(a)
      • Vars
        • K(b);S_FLIGHT::B(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);N_PINP(a)
      • Vars
        • K(b);S_FLIGHT::B(E)
        • K(b);P_SPINP(a),S_FLIGHT::QAR1(B),XP(a)
        • K(b);P-FLIGHT::QAB1(B),XP(a)
      • Refutation
        • P(a);
    • Try
      • Q(B);N_PINP(a)
      • Vars
        • K(b);S_FLIGHT::QAR1(B),XP(a)
        • K(b);P-FLIGHT,P_SPINP(a)::QAB1(B),XP(a)
        • P(a);::B(E)
      • Refutation
        • P(a);XQ(B)
    • Try
      • Q(B);N_PINP(a)
      • Vars
        • K(b);S_FLIGHT::QAB1(B)
        • P(a);SBLOCK::B(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);N_PINP(a)
      • Vars
        • K(b);P-FLIGHT::QAR1(B)
      • Refutation
        • P(a);
    • Try
      • Q(B);
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT::QAB1(B)
        • K(b);N_SPINP(a),S_FLIGHT::QAR1(B),XP(a)
        • K(b);N_SPINP(a),P-FLIGHT::QAB1(B),XP(a)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
    • Try
      • Q(B);
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
  • Actual
    • Q(B);N_PINP(a)
    • Vars
      • K(b);S_FLIGHT::QAB1(B)
      • K(b);S_FLIGHT::B(E)
      • K(b);S_FLIGHT::QAR1(B),XP(a)
      • K(b);P-FLIGHT,P_SPINP(a)::QAB1(B),XP(a)
      • P(a);SBLOCK::B(E)
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