MESON Chess Problem Database

Problem Display
PID: 206714 (8/8/8/8/5Q2/7K/6p1/6k1 w - - 0 1)

Ballo, Gyorgy

Magyar Sakkvilag, 1925

8/8/8/8/5Q2/7K/6p1/6k1

#2

2 + 2

3713 Snap 2020
6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kh1
      • 2.Qh2#
  • Tries
    • 1.Qd2?
      • threat
        • 2.Qe1#
        • 2.Qxg2#
      • 1...Kh1
        • 2.Qxg2#
      • 1...Kf1!
    • 1.Qg3?
      • threat
        • 2.Qe1#
        • 2.Qxg2#
      • 1...Kh1
        • 2.Qh2#
        • 2.Qxg2#
      • 1...Kf1!
    • 1.Qf2+?
      • 1...Kh1
        • 2.Qxg2#
      • 1...Kxf2!
  • Keys
    • 1.Qf3!
      • 1...Kh1
        • 2.Qxg2#

This anticipates 110539(1950)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::QAR1(B)
  • Tries
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT::QAB1(B),XP(b)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);P_PINP(b)
      • Threat
        • DUALS(2)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB1(B),XP(b)
      • Refutation
        • K(a);S_FLIGHT,XQ(B)
  • Actual
    • Q(B);
    • Vars
      • K(a);P-FLIGHT,P_SPINP(b)::QAB1(B),XP(b)
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