MESON Chess Problem Database

Problem Display
PID: 231102 (8/8/8/8/8/7Q/1p1P1k2/bK5R w - - 0 1)

Schiffert, Gyorgy

Magyar Sakkvilag, 1927

8/8/8/8/8/7Q/1p1P1k2/bK5R

#2

4 + 3

5454 Near Snap 2021
6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ke2
      • 2.Qe3#
  • Tries
    • 1.Rg1?
      • threat
        • 2.Qf1#
        • 2.Qg2#
        • 2.Qe3#
      • 1...Ke2
        • 2.Qe3#
      • 1...Kxg1!
    • 1.Rh2+?
      • 1...Kg1
        • 2.Qg2#
      • 1...Ke1!
    • 1.Qa3?
      • 1...Ke2
        • 2.Qe3#
      • 1...Kg2!
    • 1.Qb3?
      • 1...Ke2
        • 2.Qe3#
      • 1...Kg2!
    • 1.Qc3?
      • 1...Ke2
        • 2.Qe3#
      • 1...Kg2!
    • 1.Qg3+?
      • 1...Ke2
        • 2.Qe3#
      • 1...Kxg3!
  • Keys
    • 1.Rd1!
      • 1...Ke2
        • 2.Qf1#

This anticipates 243832(1997)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(c);P-FLIGHT::QAR1(D)
  • Tries
    • Try
      • R(B);
      • Threat
        • DUALS(3)
      • Vars
        • K(c);P-FLIGHT::QAR1(D)
      • Refutation
        • K(c);S_FLIGHT,XR(B)
    • Try
      • R(B);CHECK
      • Vars
        • K(c);S_FLIGHT::QAR1(D)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(D);
      • Vars
        • K(c);P-FLIGHT::QAR1(D)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(D);
      • Vars
        • K(c);P-FLIGHT::QAR1(D)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(D);
      • Vars
        • K(c);P-FLIGHT::QAR1(D)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • K(c);P-FLIGHT::QAR1(D)
      • Refutation
        • K(c);S_FLIGHT,XQ(D)
  • Actual
    • R(B);
    • Vars
      • K(c);P-FLIGHT::QAB1(D)
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