MESON Chess Problem Database

Problem Display
PID: 99666 (8/p7/P7/P7/Q7/2K5/2P5/1k6 w - - 0 1)

Schonberger, Tibor

Magyar Sakkvilag, 1925

8/p7/P7/P7/Q7/2K5/2P5/1k6

#2

5 + 2

6490 yacpdb 2009
5454 Near Snap 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kc1
      • 2.Qa1#
  • Tries
    • 1.Kd3?
      • 1...Kc1
        • 2.Qa1#
      • 1...Kb2!
    • 1.Qb3+?
      • 1...Ka1
        • 2.Qb2#
      • 1...Kc1!
    • 1.Qa2+?
      • 1...Kc1
        • 2.Qa1#
      • 1...Kxa2!
    • 1.Qb4+?
      • 1...Ka1
        • 2.Qb2#
      • 1...Ka2
        • 2.Qb2#
      • 1...Kc1!
    • 1.Qc4?
      • 1...Kc1
        • 2.Qf1#
      • 1...Ka1!
  • Keys
    • 1.Qb5+!
      • 1...Ka1
        • 2.Qb2#
      • 1...Kc1
        • 2.Qf1#
      • 1...Ka2
        • 2.Qb2#

This anticipates 178764(1984)

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::QAR2(C)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR2(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB1(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR2(C)
      • Refutation
        • K(a);S_FLIGHT,XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB1(C)
        • K(a);S_FLIGHT::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(a);P-FLIGHT::QAR(C)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(C);CHECK
    • Vars
      • K(a);P-FLIGHT::QAB1(C)
      • K(a);P-FLIGHT::QAR(C)
      • K(a);S_FLIGHT::QAR1(C)
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