MESON Chess Problem Database

Problem Display
PID: 241772 (4B3/8/8/3K1kpQ/5p2/8/8/8 w - - 0 1)

Szentgyorgy, Erno

Magyar Sakkvilag, 1928

4B3/8/8/3K1kpQ/5p2/8/8/8

#2

3 + 3

5454 Near Snap 2021
15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kf6
      • 2.Qf7#
    • 1...f3
      • 2.Qxf3#
  • Tries
    • 1.Kd6?
      • 1...Kf6
        • 2.Qg6#
        • 2.Qf7#
      • 1...f3
        • 2.Qxf3#
      • 1...Ke4!
    • 1.Bf7?
      • 1...f3
        • 2.Qxf3#
      • 1...Kf6!
    • 1.Qh7+?
      • 1...Kf6
        • 2.Qf7#
      • 1...Kg4!
  • Keys
    • 1.Qe2!
      • threat
        • 2.Qe6#
      • 1...Kf6
        • 2.Qe5#
      • 1...f3
        • 2.Qxf3#
      • 1...g4
        • 2.Qe5#

Anticipated by 205539(1925)

This anticipates 171353(1995)

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);N_SPINP(c),P-FLIGHT::QAR1(B)
    • P(a);OGATEB::QAR2(B),XP(a)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • P(a);OGATEB::QAR2(B),XP(a)
      • Refutation
        • K(b);N_SPINP(c),S_FLIGHT
    • Try
      • B(C);
      • Vars
        • P(a);OGATEB::QAR2(B),XP(a)
      • Refutation
        • K(b);N_SPINP(c),P-FLIGHT
    • Try
      • Q(B);CHECK,N_PINP(c)
      • Vars
        • K(b);P-FLIGHT::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(B);N_PINP(c)
    • Threat
      • QAB1(B)
    • Vars
      • K(b);P-FLIGHT::QAB1(B)
      • P(a);OGATEB::QAR2(B),XP(a)
      • P(c);SBLOCK::QAR1(B)
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