MESON Chess Problem Database

Problem Display
PID: 224134 (8/5pr1/1R6/P1kPp2R/2pn2r1/2N4Q/Kn2N3/6B1 w - - 0 1)

Pierce, James

English Mechanic and World of Science, 1877

(First published on Fri Sep 14 1877)

8/5pr1/1R6/P1kPp2R/2pn2r1/2N4Q/Kn2N3/6B1

#2

9 + 8

15239 Valois Notebooks 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rg2
      • 2.Qc8#
    • 1...Rg3
      • 2.Qc8#
    • 1...Re4
      • 2.Qc8#
    • 1...Rf4
      • 2.Qc8#
    • 1...Rh4
      • 2.Qc8#
    • 1...R4g5
      • 2.Qc8#
    • 1...e4
      • 2.Bxd4#
  • Tries
    • 1.Sa4+?
      • 1...Kxd5
        • 2.Sec3#
      • 1...Sxa4!
    • 1.Se4+?
      • 1...Kxd5
        • 2.S2c3#
      • 1...Rxe4!
    • 1.Bxd4+?
      • 1...Rxd4
        • 2.Qc8#
      • 1...exd4!
  • Keys
    • 1.Sf4!
      • threat
        • 2.Se4#
      • 1...Rxf4
        • 2.Qc8#
      • 1...e4
        • 2.Sxe4#
      • 1...f5
        • 2.Se6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • R(d);OGATE::QAR(E)
    • P(f);N_GUARD,S_CUTR(d)::B(A),XS(c)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(e);N_SPINS(c),P-FLIGHT,P_SPINP(f),XP(G)::S(C)
      • Refutation
        • S(a);XS(D)
    • Try
      • S(D);CHECK
      • Vars
        • K(e);N_SPINS(c),P-FLIGHT,P_SPINP(f),XP(G)::S(C)
      • Refutation
        • R(d);XS(D)
    • Try
      • B(A);CHECK,XS(c)
      • Vars
        • R(d);OGATE,XB(A)::QAR(E)
      • Refutation
        • P(f);XB(A)
  • Actual
    • S(C);
    • Threat
      • S(D)
    • Vars
      • R(d);OGATE,XS(C)::QAR(E)
      • P(f);::S(D),XP(f)
      • P(g);N_GUARD::S(C)
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