MESON Chess Problem Database

Problem Display
PID: 241975 (2N4Q/5p2/5r2/4k3/4B3/4K3/8/8 w - - 0 1)

Szentgyorgy, Erno

Magyar Sakkvilag, 1933

2N4Q/5p2/5r2/4k3/4B3/4K3/8/8

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ke6
      • 2.Qe8#
  • Tries
    • 1.Kd3?
      • 1...Ke6
        • 2.Qe8#
      • 1...Kf4!
    • 1.Bd5?
      • 1...Kf5
        • 2.Qh5#
      • 1...Kxd5!
    • 1.Qh2+?
      • 1...Ke6
        • 2.Qd6#
      • 1...Rf4!
  • Keys
    • 1.Qh5+!
      • 1...Ke6
        • 2.Qd5#
      • 1...Rf5
        • 2.Qxf5#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);N_SPINR(b),P-FLIGHT::QAR2(D)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(a);N_SPINR(b),P-FLIGHT::QAR2(D)
      • Refutation
        • K(a);N_SPINR(b),S_FLIGHT
    • Try
      • B(B);
      • Vars
        • K(a);N_SPINR(b),P-FLIGHT::QAR2(D)
      • Refutation
        • K(a);N_SPINR(b),P-FLIGHT,XB(B)
    • Try
      • Q(D);CHECK,N_PINR(b)
      • Vars
        • K(a);OGATE,P-FLIGHT::QAR1(D)
      • Refutation
        • R(b);P_SPINR(b)
  • Actual
    • Q(D);CHECK,N_PINR(b)
    • Vars
      • K(a);OGATE,P-FLIGHT::QAB1(D)
      • R(b);N_GUARD,P_SPINR(b)::QAR1(D),XR(b)
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