MESON Chess Problem Database

Problem Display
PID: 250441 (7b/4R3/2p5/3k1b2/3BR3/8/3K4/Q7 w - - 0 1)

Turner, WH

Manchester Evening News, 1925

7b/4R3/2p5/3k1b2/3BR3/8/3K4/Q7

#2

5 + 4

15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd4
      • 2.Qxd4#
  • Tries
    • 1.R4e5+?
      • 1...Kc4
        • 2.Qc3#
        • 2.Qa4#
      • 1...Kd6
        • 2.Bc5#
      • 1...Bxe5!
    • 1.Qa5+?
      • 1...Kd6
        • 2.Qc5#
      • 1...c5
        • 2.Qxc5#
      • 1...Kc4!
  • Keys
    • 1.Be5!
      • threat
        • 2.Qd4#
      • 1...Kxe4
        • 2.Qh1#
      • 1...Kc5
        • 2.Qa5#
      • 1...Bxe5
        • 2.Qxe5#
      • 1...c5
        • 2.Qa8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • B(d);OGATE,XB(C)::QAR1(A),XB(d)
  • Tries
    • Try
      • R(D);CHECK
      • Vars
        • K(a);N_GUARD,P-FLIGHT,S_CUTB(d)::B(C)
      • Refutation
        • B(d);XR(D)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB1(A)
        • P(c);P_SPINP(c)::QAR1(A),XP(c)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • B(C);
    • Threat
      • QAR1(A)
    • Vars
      • K(a);OGATEB,S_FLIGHT,XR(D)::QAB(A)
      • K(a);N_GUARD,P-FLIGHT,S_CUTP(c)::QAR2(A)
      • B(d);OGATE,XB(C)::QAR1(A),XB(d)
      • P(c);OGATEB,SBLOCK::QAB(A)
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