MESON Chess Problem Database

Problem Display
PID: 152863 (QK4N1/2B2N2/6pp/5kn1/6nr/1B2pp1p/5p1r/8 w - - 0 1)

Dawson, Thomas Rayner

British Chess Magazine, 1942

QK4N1/2B2N2/6pp/5kn1/6nr/1B2pp1p/5p1r/8

#2

6 + 11

15256 TRD Scrapbook 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Se6
      • 2.Bc2#
    • 1...Sh7
      • 2.Qxf3#
  • Tries
    • 1.Bc2+?
      • 1...Se4
        • 2.Qxe4#
      • 1...Ke6!
    • 1.Qa5+?
      • 1...Ke4
        • 2.Qd5#
      • 1...Se5!
  • Keys
    • 1.Qa4!
      • threat
        • 2.Qf4#
      • 1...Se5
        • 2.Sd6#
      • 1...Sf6
        • 2.Se7#
      • 1...Se4
        • 2.Qd7#
      • 1...Se6
        • 2.Bc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(i);N_GUARD,SBLOCK::B(A)
    • S(i);N_GUARD::QAR2(D),XP(d)
  • Tries
    • Try
      • B(A);CHECK
      • Vars
        • S(i);N_GUARD,P_SPINS(i)::QAB1(D),XS(i)
      • Refutation
        • K(h);S_FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • K(h);S_FLIGHT::QAB1(D)
      • Refutation
        • S(f);P_SPINS(f)
  • Actual
    • Q(D);
    • Threat
      • QAR1(D)
    • Vars
      • S(f);SBLOCK::S(C)
      • S(f);SBLOCK::S(F)
      • S(i);N_GUARD,SBLOCK::QAB(D)
      • S(i);N_GUARD,SBLOCK::B(A)
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