MESON Chess Problem Database

Problem Display
PID: 227496 (3Q4/1k2P3/8/3p4/K7/8/8/7B w - - 0 1)

Kipping, Cyril Stanley

Chess Amateur (The), 1926

3Q4/1k2P3/8/3p4/K7/8/8/7B

#2

4 + 2

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Bxd5+?
      • 1...Ka6
        • 2.Qa5#
      • 1...Ka7!
    • 1.Qb6+?
      • 1...Ka8
        • 2.Bxd5#
        • 2.e8Q#
        • 2.e8R#
      • 1...Kc8
        • 2.e8Q#
      • 1...Kxb6!
  • Keys
    • 1.Qxd5+!
      • 1...Ka6
        • 2.Qb7#
        • 2.Qa5#
      • 1...Kb6
        • 2.Qa5#
      • 1...Ka7
        • 2.Qb7#
      • 1...Kc7
        • 2.Qd8#
      • 1...Kb8
        • 2.Qb7#
      • 1...Kc8
        • 2.Qb7#
        • 2.Qd8#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(A);CHECK,XP(a)
      • Vars
        • K(b);S_FLIGHT::QAR1(D)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT::P=Q
      • Refutation
        • K(b);N_SPINP(a),P-FLIGHT,XQ(D)
  • Actual
    • Q(D);CHECK,XP(a)
    • Vars
      • K(b);P-FLIGHT::QAB1(D)
      • K(b);P-FLIGHT::QAR1(D)
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