MESON Chess Problem Database

Problem Display
PID: 241997 (1Q6/8/8/8/p1k1P3/R3K3/8/8 w - - 0 1)

Szentgyorgy, Erno

Magyar Sakkvilag, 1933

1Q6/8/8/8/p1k1P3/R3K3/8/8

#2

4 + 2

5454 Near Snap 2021
15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Rc3#
  • Tries
    • 1.Kf4?
      • 1...Kd4
        • 2.Qb4#
      • 1...Kc5!
    • 1.Ra2?
      • threat
        • 2.Rc2#
      • 1...Kc5
        • 2.Rc2#
      • 1...Kc3!
    • 1.Rb3?
      • threat
        • 2.Qb4#
        • 2.Qb5#
      • 1...Kc5
        • 2.Rc3#
        • 2.Qc7#
      • 1...axb3!
    • 1.Rd3?
      • 1...Kc5
        • 2.Rc3#
      • 1...a3!
  • Keys
    • 1.Ra1!
      • threat
        • 2.Rc1#
      • 1...Kc3
        • 2.Rc1#
      • 1...Kc5
        • 2.Rc1#

Anticipated by 208740(1875), 159320(1911)

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT::R(A)
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Vars
        • K(b);P-FLIGHT::QAR2(D)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • R(A);
      • Threat
        • R(A)
      • Vars
        • K(b);P-FLIGHT::R(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • R(A);
      • Threat
        • DUALS(2)
      • Refutation
        • P(a);XR(A)
    • Try
      • R(A);
      • Vars
        • K(b);P-FLIGHT::R(A)
      • Refutation
        • P(a);
  • Actual
    • R(A);
    • Threat
      • R(A)
    • Vars
      • K(b);P-FLIGHT::R(A)
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