MESON Chess Problem Database

Problem Display
PID: 206643 (1b4Q1/1K6/3pp1p1/4k3/5R1P/8/3N4/8 w - - 0 1)

Szigetvary, Aladar

Nepszava, 1925

1b4Q1/1K6/3pp1p1/4k3/5R1P/8/3N4/8

#2

5 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...d5
      • 2.Qxb8#
    • 1...g5
      • 2.Qxg5#
  • Tries
    • 1.Re4+?
      • 1...Kf5
        • 2.Qxe6#
        • 2.Qf7#
        • 2.Qf8#
      • 1...Kf6
        • 2.Qf8#
      • 1...Kd5!
    • 1.Qg7+?
      • 1...Kd5
        • 2.Qd4#
      • 1...Kxf4!
    • 1.Qh8+?
      • 1...Kd5
        • 2.Qd4#
      • 1...Kxf4!
  • Keys
    • 1.Qd8!
      • threat
        • 2.Qg5#
      • 1...Kxf4
        • 2.Qg5#
      • 1...Kd5
        • 2.Qa5#
      • 1...d5
        • 2.Qxb8#
      • 1...g5
        • 2.Qxg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(b);OGATEB,SBLOCK::QAB(E),XB(e)
    • P(d);OGATE::QAR2(E),XP(d)
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR2(E)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(c)
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT,XR(B)
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT,XR(B)
  • Actual
    • Q(E);
    • Threat
      • QAR2(E)
    • Vars
      • K(a);S_FLIGHT,XR(B)::QAB1(E)
      • K(a);P-FLIGHT,P_SPINP(b)::QAR(E)
      • P(b);OGATEB,SBLOCK::QAB(E),XB(e)
      • P(d);::QAR2(E),XP(d)
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Developed and maintained by Brian Stephenson.
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