MESON Chess Problem Database

Problem Display
PID: 241994 (4R3/8/4Pk2/2K5/6Q1/5p2/5N2/8 w - - 0 1)

Szentgyorgy, Erno

Magyar Sakkvilag, 1933

4R3/8/4Pk2/2K5/6Q1/5p2/5N2/8

#2

5 + 2

5454 Near Snap 2021
15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ke5
      • 2.Qg5#
  • Tries
    • 1.Re7?
      • 1...Ke5
        • 2.Qg5#
      • 1...Kxe7!
    • 1.Rf8+?
      • 1...Ke5
        • 2.Sd3#
        • 2.Qf5#
        • 2.Qe4#
      • 1...Ke7!
    • 1.Qg1?
      • 1...Ke5
        • 2.Qg5#
      • 1...Kf5!
    • 1.Qg6+?
      • 1...Ke5
        • 2.Sd3#
        • 2.Qg5#
      • 1...Kxg6!
    • 1.Qg8?
      • 1...Ke5
        • 2.Qg5#
      • 1...Kf5!
  • Keys
    • 1.Sh3!
      • threat
        • 2.Qg5#
      • 1...Ke5
        • 2.Qf4#

This anticipates 12423(1979)

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::QAR2(B)
  • Tries
    • Try
      • R(E);
      • Vars
        • K(b);S_FLIGHT::QAR2(B)
      • Refutation
        • K(b);S_FLIGHT,XR(E)
    • Try
      • R(E);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(b);S_FLIGHT::QAR2(B)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Refutation
        • K(b);P-FLIGHT,XQ(B)
    • Try
      • Q(B);
      • Vars
        • K(b);S_FLIGHT::QAR2(B)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • S(A);
    • Threat
      • QAB1(B)
    • Vars
      • K(b);S_FLIGHT::QAB1(B)
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