MESON Chess Problem Database

Problem Display
PID: 243426 (b7/K5B1/1p5R/p5k1/8/4rpPB/8/2Q1N1q1 w - - 0 1)

Beale, John Lindsay

Chess World (The), 1948

b7/K5B1/1p5R/p5k1/8/4rpPB/8/2Q1N1q1

#2

7 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qh2
      • 2.Qxe3#
    • 1...Qf1
      • 2.Qxe3#
    • 1...Qh1
      • 2.Qxe3#
    • 1...Qg2
      • 2.Qxe3#
    • 1...f2
      • 2.Qxe3#
  • Keys
    • 1.Qc7!
      • threat
        • 2.Qf4#
      • 1...Qxg3
        • 2.Qxg3#
      • 1...Re4
        • 2.Sxf3#
      • 1...Re5
        • 2.Qxe5#
      • 1...Re7
        • 2.Qxe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • Q(a);N_GUARD::QAB(A),XR(b)
    • P(c);S_CUTQ(a)::QAB(A),XR(b)
  • Actual
    • Q(A);N_PINR(b)
    • Threat
      • QAB1(A)
    • Vars
      • Q(a);OGATE,XP(C)::QAR2(A),XQ(a)
      • R(b);N_GUARD,S_CUTB(g)::S(B),XP(c)
      • R(b);N_GUARD::QAR2(A),XR(b)
      • R(b);N_GUARD,P_PINQ(A)::QAB(A),XR(b)
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