MESON Chess Problem Database

Problem Display
PID: 100031 (8/8/2K5/8/1kN5/8/3P1N2/3Q4 w - - 0 1)

Szentgyorgy, Erno

Magyar Sakkvilag, 1933

8/8/2K5/8/1kN5/8/3P1N2/3Q4

#2

5 + 1

6490 yacpdb 2009
5454 Near Snap 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc4
      • 2.Qa4#
  • Tries
    • 1.Kd6?
      • 1...Kxc4
        • 2.Qa4#
      • 1...Kb5!
    • 1.Sb2?
      • threat
        • 2.Qa4#
      • 1...Ka5
        • 2.Qa4#
      • 1...Ka3!
    • 1.Sa5?
      • 1...Ka3
        • 2.Qb3#
      • 1...Kxa5!
    • 1.Sb6?
      • threat
        • 2.Qa4#
      • 1...Ka5
        • 2.Qa4#
      • 1...Ka3!
    • 1.Qa1?
      • 1...Kxc4
        • 2.Qc3#
        • 2.Qa4#
      • 1...Kb3!
    • 1.Qb1+?
      • 1...Ka4
        • 2.Qb5#
      • 1...Kxc4!
    • 1.Qc1?
      • 1...Ka4
        • 2.Qa3#
      • 1...Kb3!
  • Keys
    • 1.Qf3!
      • 1...Ka4
        • 2.Qa3#
      • 1...Kxc4
        • 2.Qc3#

This anticipates 46503(1937)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT,XS(D)::QAR2(A)
  • Tries
    • Try
      • K(E);P-FLIGHT
      • Vars
        • K(a);P-FLIGHT,XS(D)::QAR2(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(D);
      • Threat
        • QAR1(A)
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(D);
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT,XS(D)
    • Try
      • S(D);
      • Threat
        • QAR1(A)
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT,XS(D)
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(a);P-FLIGHT::QAR1(A)
      • K(a);P-FLIGHT,XS(D)::QAR1(A)
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