MESON Chess Problem Database

Problem Display
PID: 146110 (2R2B2/Np6/n1b2n2/8/r1kN4/1R2P3/5pQ1/6bK w - - 0 1)

Boswell, Edward

Lancaster Guardian, 1925

(First published on Sat Nov 7 1925)

2R2B2/Np6/n1b2n2/8/r1kN4/1R2P3/5pQ1/6bK

#2

8 + 8

14868 Pirnie Collection 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Se4
      • 2.Qg8#
    • 1...Sd5
      • 2.Qf1#
  • Tries
    • 1.Saxc6?
      • threat
        • 2.Sa5#
        • 2.Se5#
      • 1...Se4
        • 2.Qg8#
      • 1...Ra5
        • 2.Sxa5#
        • 2.Se5#
      • 1...Sc5
        • 2.Se5#
      • 1...Sc7
        • 2.Se5#
      • 1...bxc6!
    • 1.Rxc6+?
      • 1...Sc5
        • 2.Rxc5#
      • 1...bxc6!
    • 1.Qxc6+?
      • 1...Sc5
        • 2.Qxc5#
      • 1...bxc6!
  • Keys
    • 1.Sab5!
      • threat
        • 2.Rc3#
      • 1...Se4
        • 2.Qg8#
      • 1...Ra3
        • 2.Sxa3#
      • 1...Sc5
        • 2.Sd6#
      • 1...Sd5
        • 2.Qf1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(g);N_PINQ(B)::QAB(B)
    • S(g);N_PINQ(B),SBLOCK::QAB(B)
  • Tries
    • Try
      • S(F);N_SPINQ(B),XB(f)
      • Threat
        • DUALS(2)
      • Vars
        • S(g);N_GUARD::QAB(B)
        • S(e);::S(F)
      • Refutation
        • P(h);P_SPINP(h),XS(F)
    • Try
      • R(G);CHECK,N_SPINQ(B),XB(f)
      • Vars
        • S(e);N_GUARD,P_SPINS(e)::R1(G),XS(e)
      • Refutation
        • P(h);XR(G)
    • Try
      • Q(B);CHECK,N_SPINQ(B),XB(f)
      • Vars
        • S(e);N_GUARD,P_SPINS(e)::QAR1(B),XS(e)
      • Refutation
        • P(h);P_SPINP(h),XQ(B)
  • Actual
    • S(F);
    • Threat
      • R1(C)
    • Vars
      • S(g);N_PINQ(B)::QAB(B)
      • R(c);N_GUARD::S(F),XR(c)
      • S(e);N_SPINB(f),SBLOCK::S(F)
      • S(g);N_PINQ(B),SBLOCK::QAB(B)
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