MESON Chess Problem Database

Problem Display
PID: 206719 (8/8/8/8/8/5K2/1QBk4/8 w - - 0 1)

Schonberger, Tibor

Magyar Sakkvilag, 1925

8/8/8/8/8/5K2/1QBk4/8

#2

3 + 1

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ke1
      • 2.Qc1#
  • Tries
    • 1.Bb1+?
      • 1...Ke1
        • 2.Qc1#
        • 2.Qe2#
      • 1...Kd1!
    • 1.Bd1+?
      • 1...Ke1
        • 2.Qe2#
      • 1...Kd3
        • 2.Be2#
      • 1...Kxd1!
    • 1.Bb3+?
      • 1...Ke1
        • 2.Qc1#
        • 2.Qe2#
        • 2.Qf2#
      • 1...Kd3!
    • 1.Be4+?
      • 1...Ke1
        • 2.Qc1#
        • 2.Qe2#
      • 1...Kd1!
    • 1.Bf5+?
      • 1...Ke1
        • 2.Qc1#
        • 2.Qe2#
      • 1...Kd1!
    • 1.Bg6+?
      • 1...Ke1
        • 2.Qc1#
        • 2.Qe2#
      • 1...Kd1!
    • 1.Bh7+?
      • 1...Ke1
        • 2.Qc1#
        • 2.Qe2#
      • 1...Kd1!
    • 1.Qa3?
      • 1...Ke1
        • 2.Qc1#
      • 1...Kxc2!
  • Keys
    • 1.Ba4+!
      • 1...Ke1
        • 2.Qc1#
        • 2.Qe2#
        • 2.Qf2#
      • 1...Kd3
        • 2.Bb5#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(a);S_FLIGHT::QAR2(A)
  • Tries
    • Try
      • B(B);CHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • B(B);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(A)
        • K(a);P-FLIGHT::B(B)
      • Refutation
        • K(a);P-FLIGHT,XB(B)
    • Try
      • B(B);CHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • B(B);CHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • B(B);CHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • B(B);CHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • B(B);CHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::QAR2(A)
      • Refutation
        • K(a);P-FLIGHT,XB(B)
  • Actual
    • B(B);CHECK
    • Vars
      • K(a);P-FLIGHT::B(B)
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Developed and maintained by Brian Stephenson.
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