MESON Chess Problem Database

Problem Display
PID: 10826 (8/8/3Q4/1B2p2K/4p3/4k3/8/6R1 w - - 0 1)

Speckmann, Werner

Themes-64, 1968

8/8/3Q4/1B2p2K/4p3/4k3/8/6R1

#2

4 + 3

SOLUTION

  • SOUND
  • Tries
    • 1.Qc5+?
      • 1...Kd2
        • 2.Qc1#
      • 1...Kf4
        • 2.Qf2#
      • 1...Kf3!
    • 1.Qxe5?
      • 1...Kf2
        • 2.Qg3#
      • 1...Kf3
        • 2.Qg3#
      • 1...Kd2!
    • 1.Qd3+?
      • 1...Kf2
        • 2.Qg3#
      • 1...Kf4
        • 2.Rf1#
      • 1...exd3!
  • Keys
    • 1.Qa3+!
      • 1...Kd2
        • 2.Qc1#
      • 1...Kf2
        • 2.Qg3#
      • 1...Kd4
        • 2.Rd1#
      • 1...Kf4
        • 2.Rf1#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(D)
        • K(a);OGATE,S_FLIGHT::QAR2(D)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(D);P_PINP(b),XP(c)
      • Vars
        • K(a);N_SPINP(b),S_FLIGHT::QAB1(D)
        • K(a);N_SPINP(b),P-FLIGHT::QAR1(D)
      • Refutation
        • K(a);N_SPINP(b),S_FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(D)
        • K(a);S_FLIGHT::R(A)
      • Refutation
        • P(b);XQ(D)
  • Actual
    • Q(D);CHECK
    • Vars
      • K(a);S_FLIGHT::QAB1(D)
      • K(a);OGATE,S_FLIGHT::QAB1(D)
      • K(a);S_FLIGHT::R(A)
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Developed and maintained by Brian Stephenson.
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