MESON Chess Problem Database

Problem Display
PID: 273178 (6b1/8/5p2/2N1k3/1K1R4/3p4/8/Q7 w - - 0 1)

Thain, JO

Liverpool Courier, 1910

(First published on Fri Nov 4 1910)

6b1/8/5p2/2N1k3/1K1R4/3p4/8/Q7

#2

4 + 4

15239 Valois Notebooks 2023

SOLUTION

  • SOUND
  • Tries
    • 1.Qe1+?
      • 1...Kxd4
        • 2.Qe4#
      • 1...Kf5!
  • Keys
    • 1.Qh1!
      • threat
        • 2.Qe4#
      • 1...Kxd4
        • 2.Qe4#
      • 1...Kf5
        • 2.Qh5#
      • 1...Bd5
        • 2.Qxd5#
      • 1...Bh7
        • 2.Qd5#
      • 1...f5
        • 2.Qh8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT,XR(C)::QAR1(A)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • K(b);S_FLIGHT,XR(C)::QAR1(A)
      • K(b);N_GUARD,P-FLIGHT,S_CUTP(c)::QAR2(A)
      • B(d);N_GUARD::QAR1(A),XB(d)
      • B(d);N_GUARD::QAR1(A)
      • P(c);OGATEB,SBLOCK::QAB(A)
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