MESON Chess Problem Database

Problem Display
PID: 62034 (1qbr4/1p6/1N5R/3pQ2B/1p2P3/1k6/1P2P3/1K6 w - - 0 1)

Bufton, JEL

Chess, 1943

1qbr4/1p6/1N5R/3pQ2B/1p2P3/1k6/1P2P3/1K6

#2

8 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qa7
      • 2.Qg3#
    • 1...Qa8
      • 2.Qg3#
    • 1...Rd6
      • 2.Qg3#
    • 1...Re8
      • 2.Qxd5#
    • 1...Rf8
      • 2.Qxd5#
    • 1...Rg8
      • 2.Qxd5#
    • 1...Rh8
      • 2.Qxd5#
    • 1...Bd7
      • 2.Qxd5#
  • Tries
    • 1.Qd4?
      • threat
        • 2.Qe3#
        • 2.Qd1#
        • 2.Qd3#
      • 1...dxe4
        • 2.Qc4#
      • 1...Qg3
        • 2.Qd1#
      • 1...Qf4
        • 2.Qd1#
        • 2.Qd3#
      • 1...Qe5
        • 2.Qd1#
      • 1...Qc7!
  • Keys
    • 1.Be8!
      • threat
        • 2.Ba4#
      • 1...Rxe8
        • 2.Qxd5#
      • 1...Qa7
        • 2.Qg3#
      • 1...Qa8
        • 2.Qg3#
      • 1...Rd7
        • 2.Rh3#
      • 1...Bd7
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • Q(e);N_GUARD::QAR(E)
    • R(g);S_CUTQ(e)::QAR(E)
    • R(g);N_GUARD::QAB(E),XP(c)
    • B(f);S_CUTR(g)::QAB(E),XP(c)
  • Tries
    • Try
      • Q(E);
      • Threat
        • DUALS(3)
      • Vars
        • P(c);N_GUARD,XP(D)::QAB1(E)
        • Q(e);::QAB(E)
      • Refutation
        • Q(e);
  • Actual
    • B(F);
    • Threat
      • B(F)
    • Vars
      • R(g);N_GUARD,XB(F)::QAB(E),XP(c)
      • Q(e);N_GUARD::QAR(E)
      • R(g);S_CUTB(f)::R(H)
      • B(f);S_CUTR(g)::QAB(E),XP(c)
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