MESON Chess Problem Database

Problem Display
PID: 227898 (8/8/1p6/8/QPk1K3/P7/3P4/8 w - - 0 1)

Ballo, Gyorgy

Magyar Sakkvilag, 1926

8/8/1p6/8/QPk1K3/P7/3P4/8

#2

5 + 2

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...b5
      • 2.Qc2#
  • Tries
    • 1.Ke5?
      • 1...b5
        • 2.Qc2#
      • 1...Kd3!
    • 1.Qd1?
      • 1...b5
        • 2.Qc2#
      • 1...Kb5!
    • 1.Qe8?
      • 1...b5
        • 2.Qf7#
        • 2.Qe6#
        • 2.Qg8#
      • 1...Kb3!
    • 1.Qa6+?
      • 1...b5
        • 2.Qe6#
      • 1...Kb3!
    • 1.d4?
      • 1...b5
        • 2.Qc2#
      • 1...Kc3!
  • Keys
    • 1.b5+!
      • 1...Kc5
        • 2.Qb4#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • P(b);SBLOCK::QAR2(C)
  • Tries
    • Try
      • K(E);P-FLIGHT
      • Vars
        • P(b);SBLOCK::QAR2(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);
      • Vars
        • P(b);SBLOCK::QAR2(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • P(b);OGATE,P_SPINP(b),SBLOCK::QAB(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • P(A);
      • Vars
        • P(b);SBLOCK::QAR2(C)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • P(D);CHECK
    • Vars
      • K(a);P-FLIGHT::QAB1(C)
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