MESON Chess Problem Database

Problem Display
PID: 242085 (8/8/8/8/6p1/5PK1/3p4/3Q2bk w - - 0 1)

Szentgyorgy, Erno

Magyar Sakkvilag, 1936

8/8/8/8/6p1/5PK1/3p4/3Q2bk

#2

3 + 4

15148 Sadier Collection 2021
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...gxf3
      • 2.Qxf3#
  • Tries
    • 1.Qe2?
      • threat
        • 2.Qg2#
      • 1...Bh2+
        • 2.Qxh2#
      • 1...gxf3
        • 2.Qxf3#
      • 1...Bf2+!
  • Keys
    • 1.Qf1!
      • threat
        • 2.Qg2#
      • 1...gxf3
        • 2.Qxf3#

This anticipates 219221(1977)

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • P(d);OGATE,XP(B)::QAB(A),XP(d)
  • Tries
    • Try
      • Q(A);N_PINB(a)
      • Threat
        • QAB1(A)
      • Vars
        • B(a);CHECK,N_GUARD::QAR1(A),XB(a)
        • P(d);OGATE,XP(B)::QAB(A),XP(d)
      • Refutation
        • B(a);CHECK
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • P(d);OGATE,XP(B)::QAB(A),XP(d)
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