MESON Chess Problem Database

Problem Display
PID: 38142 (3K4/1Bpp3p/p6p/r2PN2r/4kpQp/2RN3n/q1b1P3/6B1 w - - 0 1)

Dawson, Thomas Rayner

Melbourne Leader, 1937

(First published on Sat Oct 2 1937)

3K4/1Bpp3p/p6p/r2PN2r/4kpQp/2RN3n/q1b1P3/6B1

#2

9 + 13

3979 Systematic Terminology 1984
15256 TRD Scrapbook 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Rc4#
    • 1...Qc4
      • 2.Rxc4#
    • 1...Qxd5
      • 2.Rc4#
    • 1...Qa3
      • 2.Rc4#
    • 1...Rf5
      • 2.Qf3#
    • 1...Sxg1
      • 2.Qxf4#
    • 1...Sf2
      • 2.Qxf4#
    • 1...Sg5
      • 2.Qxf4#
  • Tries
    • 1.Qg2+?
      • 1...f3
        • 2.Qxf3#
      • 1...Kf5!
  • Keys
    • 1.Sxd7!
      • threat
        • 2.Sf6#
      • 1...Qxd5
        • 2.Rc4#
      • 1...Raxd5
        • 2.Sc5#
      • 1...Rhxd5
        • 2.Qe6#
      • 1...Bxd3
        • 2.exd3#
      • 1...Sxg1
        • 2.Qxf4#
      • 1...Sf2
        • 2.Qxf4#
      • 1...Rf5
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • Q(a);N_GUARD::R(C)
    • Q(a);N_GUARD::R(C),XQ(a)
    • Q(a);N_GUARD,P_SPINQ(a),XP(F)::R(C)
    • R(h);SBLOCK::QAB1(E)
    • S(c);N_GUARD,XB(A)::QAR1(E),XP(e)
    • S(c);N_GUARD::QAR1(E),XP(e)
  • Tries
    • Try
      • Q(E);CHECK,N_PINP(e)
      • Vars
        • P(e);P_SPINP(e)::QAB1(E),XP(e)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • S(G);XP(l)
    • Threat
      • S(G)
    • Vars
      • Q(a);N_GUARD,P_PINS(G),P_SPINQ(a),XP(F)::R(C)
      • R(g);N_GUARD,P_PINS(G),P_SPINR(g),XP(F)::S(D)
      • R(h);N_GUARD,P_PINS(G),P_SPINR(h),XP(F)::QAR2(E)
      • B(b);OGATE,XS(D)::P(B),XB(b)
      • S(c);N_GUARD,XB(A)::QAR1(E),XP(e)
      • S(c);N_GUARD::QAR1(E),XP(e)
      • R(h);SBLOCK::QAB1(E)
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