MESON Chess Problem Database

Problem Display
PID: 241925 (8/8/8/4pQ2/5n1K/5k2/3P3R/8 w - - 0 1)

Szentgyorgy, Erno

Magyar Sakkvilag, 1933

8/8/8/4pQ2/5n1K/5k2/3P3R/8

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...e4
      • 2.Qg4#
  • Tries
    • 1.Kg5?
      • 1...e4
        • 2.Qg4#
        • 2.Qxf4#
      • 1...Kg3!
    • 1.Re2?
      • threat
        • 2.Qe4#
        • 2.Qg4#
      • 1...e4
        • 2.Qxe4#
        • 2.Qg4#
      • 1...Kxe2!
    • 1.Rg2?
      • 1...e4
        • 2.Qg4#
      • 1...Kxg2!
  • Keys
    • 1.d3!
      • threat
        • 2.Qe4#
      • 1...Ke3
        • 2.Qe4#
      • 1...e4
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(c);SBLOCK::QAB1(D)
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Refutation
        • K(a);N_SPINS(b),P-FLIGHT
    • Try
      • R(B);
      • Threat
        • DUALS(2)
      • Refutation
        • K(a);N_SPINS(b),S_FLIGHT,XR(B)
    • Try
      • R(B);
      • Vars
        • P(c);SBLOCK::QAB1(D)
      • Refutation
        • K(a);N_SPINS(b),S_FLIGHT,XR(B)
  • Actual
    • P(A);
    • Threat
      • QAB1(D)
    • Vars
      • K(a);N_SPINS(b),P-FLIGHT::QAR1(D)
      • P(c);::QAB1(D),XP(c)
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