MESON Chess Problem Database

Problem Display
PID: 241824 (8/8/8/5p2/5Q2/7k/5np1/4B1K1 w - - 0 1)

Szentgyorgy, Erno

Magyar Sakkvilag, 1930

8/8/8/5p2/5Q2/7k/5np1/4B1K1

#2

3 + 4

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sd1
      • 2.Qg3#
      • 2.Qf3#
      • 2.Qh4#
      • 2.Qxf5#
    • 1...Sh1
      • 2.Qh4#
      • 2.Qxf5#
    • 1...Sd3
      • 2.Qg3#
      • 2.Qf3#
      • 2.Qh4#
      • 2.Qxf5#
    • 1...Se4
      • 2.Qh4#
      • 2.Qxf5#
    • 1...Sg4
      • 2.Qg3#
      • 2.Qf3#
  • Tries
    • 1.Qg5?
      • 1...Sd1
        • 2.Qh4#
        • 2.Qxg2#
        • 2.Qg3#
        • 2.Qxf5#
        • 2.Qh5#
      • 1...Sh1
        • 2.Qh4#
        • 2.Qxg2#
        • 2.Qxf5#
        • 2.Qh5#
      • 1...Sd3
        • 2.Qh4#
        • 2.Qxg2#
        • 2.Qg3#
        • 2.Qxf5#
        • 2.Qh5#
      • 1...Se4
        • 2.Qh4#
        • 2.Qxg2#
        • 2.Qxf5#
        • 2.Qh5#
      • 1...Sg4
        • 2.Qh4#
        • 2.Qh5#
      • 1...f4!
    • 1.Qxf2?
      • threat
        • 2.Qg3#
        • 2.Qh4#
        • 2.Qxg2#
        • 2.Qf3#
        • 2.Qxf5#
      • 1...f4
        • 2.Qh4#
        • 2.Qxg2#
        • 2.Qf3#
      • 1...Kg4!
  • Keys
    • 1.Qxf5+!
      • 1...Kg3
        • 2.Bxf2#
      • 1...Kh4
        • 2.Bxf2#
      • 1...Sg4
        • 2.Qf3#
        • 2.Qh5#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(C);
      • Refutation
        • P(d);
    • Try
      • Q(C);XS(a)
      • Threat
        • DUALS(5)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(C);CHECK,XP(d)
    • Vars
      • K(c);P-FLIGHT,P_SPINS(a)::B(A),XS(a)
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