MESON Chess Problem Database

Problem Display
PID: 152470 (2b3K1/b2k4/3P2nR/1PP3QB/7n/4B3/4R3/8 w - - 0 1)

Dawson, Thomas Rayner

British Chess Magazine, 1940

2b3K1/b2k4/3P2nR/1PP3QB/7n/4B3/4R3/8

#2

9 + 5

15256 TRD Scrapbook 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Ke8
      • 2.Qe7#
    • 1...Sf4
      • 2.Qe7#
      • 2.c6#
    • 1...Se5
      • 2.Qe7#
    • 1...Se7+
      • 2.Qxe7#
    • 1...Sf8
      • 2.Qe7#
      • 2.c6#
    • 1...Sh8
      • 2.Qe7#
      • 2.c6#
  • Tries
    • 1.Rh7+?
      • 1...Ke8
        • 2.Qe7#
      • 1...Se7+
        • 2.Qxe7#
      • 1...Ke6!
    • 1.Qxg6?
      • threat
        • 2.Qe8#
      • 1...Kd8
        • 2.Qe8#
      • 1...Sxg6!
  • Keys
    • 1.c6+!
      • 1...Kxd6
        • 2.Bf4#
      • 1...Ke6
        • 2.Bc5#
      • 1...Ke8
        • 2.Qe7#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • K(d);P_SPINS(b),S_FLIGHT::QAR1(E)
    • S(b);N_GUARD::QAR1(E)
    • S(b);CHECK,N_GUARD::QAR1(E),XS(b)
  • Tries
    • Try
      • R(H);CHECK
      • Vars
        • K(d);P_SPINS(b),S_FLIGHT::QAR1(E)
        • S(b);CHECK,N_GUARD,P_SPINS(b)::QAR1(E),XS(b)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(E);XS(b)
      • Threat
        • QAB1(E)
      • Vars
        • K(d);P-FLIGHT::QAR1(E)
      • Refutation
        • S(a);XQ(E)
  • Actual
    • P(D);CHECK
    • Vars
      • K(d);P-FLIGHT,P_SPINS(b),XP(G)::B(B)
      • K(d);P_SPINS(b),S_FLIGHT::R(A)+B(B)
      • K(d);P_SPINS(b),S_FLIGHT::QAR1(E)
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