MESON Chess Problem Database

Problem Display
PID: 153300 (r2Rb1K1/N1p2p1p/5Qp1/R2Bn3/2pk3r/p6q/2PP2pb/7n w - - 0 1)

Dawson, Thomas Rayner

British Chess Magazine, 1944

r2Rb1K1/N1p2p1p/5Qp1/R2Bn3/2pk3r/p6q/2PP2pb/7n

#2

8 + 15

15256 TRD Scrapbook 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Bc6
      • 2.Sxc6#
    • 1...Sg3
      • 2.Qf2#
  • Tries
    • 1.Bxg2+?
      • 1...Qd7
        • 2.Sc6#
      • 1...Bd7
        • 2.Sc6#
        • 2.Rd5#
      • 1...Rxd8!
    • 1.Bf3+?
      • 1...Qd7
        • 2.Sc6#
      • 1...Bd7
        • 2.Sc6#
        • 2.Rd5#
      • 1...Rxd8!
    • 1.Qf2+?
      • 1...Qe3
        • 2.Qxe3#
      • 1...Sxf2!
    • 1.Qb6+?
      • 1...c5
        • 2.Qxc5#
      • 1...cxb6!
  • Keys
    • 1.Qe7!
      • threat
        • 2.Qc5#
      • 1...Bb5
        • 2.Sxb5#
      • 1...Sd3
        • 2.c3#
      • 1...Sf3
        • 2.Qe3#
      • 1...Sg4
        • 2.Qe4#
      • 1...Sc6
        • 2.Sb5#
      • 1...Sd7
        • 2.Sc6#
      • 1...c5
        • 2.Qxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 2
  • Sets
    • B(o);N_GUARD,P_PINR(G)::S(F),XB(o)
    • S(a);N_GUARD,S_CUTQ(e)::QAB(E)
  • Tries
    • Try
      • B(D);CHECK,XP(b)
      • Vars
        • Q(e);P_SPINQ(e)::S(F)
      • Refutation
        • R(n);XR(G)
    • Try
      • B(D);CHECK
      • Vars
        • Q(e);P_SPINQ(e)::S(F)
      • Refutation
        • R(n);XR(G)
    • Try
      • Q(E);CHECK,N_PINS(i)
      • Vars
        • Q(e);N_GUARD,P_SPINQ(e)::QAB1(E),XQ(e)
      • Refutation
        • S(a);XQ(E)
    • Try
      • Q(E);CHECK,N_PINS(i)
      • Vars
        • P(k);P_SPINP(k)::QAB1(E),XP(k)
      • Refutation
        • P(k);XQ(E)
  • Actual
    • Q(E);N_PINS(i)
    • Threat
      • QAB1(E)
    • Vars
      • B(o);N_GUARD,P_PINR(G)::S(F),XB(o)
      • S(i);SBLOCK,S_CUTQ(e)::P(A)
      • S(i);OGATE::QAB1(E)
      • S(i);OGATE::QAR1(E)
      • S(i);S_CUTB(o)::S(F)
      • S(i);N_GUARD,S_CUTB(o)::S(F)
      • P(k);::QAB1(E),XP(k)
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