MESON Chess Problem Database

Problem Display
PID: 48286 (2Q5/4p3/1pn1P3/1p6/1N2P3/3b1R2/1PRN2K1/k7 w - - 0 1)

Dawson, Thomas Rayner

Reading Observer, 1912

(First published on Sat Mar 23 1912)

2Q5/4p3/1pn1P3/1p6/1N2P3/3b1R2/1PRN2K1/k7

#2

9 + 6

3979 Systematic Terminology 1984
15256 TRD Scrapbook 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Bf1+
      • 2.Rxf1#
    • 1...Be2
      • 2.Ra3#
    • 1...Sd4
      • 2.Qa6#
      • 2.Qa8#
    • 1...Se5
      • 2.Qa6#
      • 2.Qa8#
    • 1...Sa7
      • 2.Qa6#
    • 1...Sd8
      • 2.Qa6#
      • 2.Qa8#
  • Tries
    • 1.Rc1+?
      • 1...Bb1
        • 2.Rxb1#
      • 1...Kxb2!
    • 1.Qa8+?
      • 1...Sa7
        • 2.Qxa7#
      • 1...Sa5!
    • 1.b3?
      • threat
        • 2.Ra2#
      • 1...Bf1+
        • 2.Rxf1#
      • 1...Sxb4
        • 2.Qc3#
        • 2.Qh8#
      • 1...Bxc2!
  • Keys
    • 1.Qh8!
      • 1...Bf1+
        • 2.Rxf1#
      • 1...Bxc2
        • 2.Ra3#
      • 1...Bxe4
        • 2.Qh1#
      • 1...Sxb4
        • 2.b3#
      • 1...Sa5
        • 2.b3#
      • 1...Be2
        • 2.Rc1#
        • 2.Ra3#
      • 1...Bc4
        • 2.Rc1#
      • 1...Sd4
        • 2.Qa8#
      • 1...Se5
        • 2.Qa8#
      • 1...Sa7
        • 2.b3#
      • 1...Sb8
        • 2.b3#
      • 1...Sd8
        • 2.b3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 9
    • REMOVED MATES = 1
  • Sets
    • B(b);CHECK,N_GUARD::R(E),XB(b)
    • B(b);OGATE::R(E)
    • S(e);N_GUARD::QAR(I)
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • B(b);N_GUARD,P_SPINB(b)::R1(B),XB(b)
      • Refutation
        • K(a);S_FLIGHT,XP(A)
    • Try
      • Q(I);CHECK
      • Vars
        • S(e);N_GUARD,P_SPINS(e)::QAR(I),XS(e)
      • Refutation
        • S(e);P_SPINS(e)
    • Try
      • P(A);
      • Threat
        • R1(B)
      • Vars
        • B(b);CHECK,N_GUARD::R(E),XB(b)
      • Refutation
        • B(b);XR(B)
  • Actual
    • Q(I);
    • Vars
      • B(b);CHECK,N_GUARD::R(E),XB(b)
      • B(b);OGATE,XR(B)::R(E)
      • B(b);N_GUARD,P_PINR(E),XP(G)::QAB1(I)
      • S(e);N_GUARD,XS(F)::QAB(I)+P(A)
      • S(e);N_GUARD::QAB(I)+P(A)
      • B(b);N_GUARD::R(B)
      • S(e);N_GUARD::QAB(I)
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