MESON Chess Problem Database

Problem Display
PID: 249391 (8/8/B2k2B1/8/8/2KpQ3/3R4/8 w - - 0 1)

ten Cate, Pieter

Deutsche Schachzeitung, 1975

8/8/B2k2B1/8/8/2KpQ3/3R4/8

#2

5 + 2

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Bb5?
      • 1...Kd5
        • 2.Rxd3#
      • 1...Kc7!
    • 1.Be8?
      • 1...Kd5
        • 2.Rxd3#
      • 1...Kc7!
  • Keys
    • 1.Qxd3+!
      • 1...Kc5
        • 2.Qb5#
        • 2.Qd6#
      • 1...Ke5
        • 2.Qf5#
        • 2.Qd6#
      • 1...Kc6
        • 2.Qd6#
      • 1...Ke6
        • 2.Qd6#
      • 1...Kc7
        • 2.Qd6#
      • 1...Ke7
        • 2.Qd6#

FEATURES

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