MESON Chess Problem Database

Problem Display
PID: 230237 (8/3b2p1/2p4n/1pBk1rn1/1P1P1p2/7B/3NQ1P1/1K6 w - - 0 1)

Pierce, James

English Mechanic and World of Science, 1879

(First published on Fri Jul 4 1879)

8/3b2p1/2p4n/1pBk1rn1/1P1P1p2/7B/3NQ1P1/1K6

#2

8 + 9

15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Re5
      • 2.Qxe5#
    • 1...Rf6
      • 2.Qe5#
    • 1...Rf7
      • 2.Qe5#
    • 1...Rf8
      • 2.Qe5#
    • 1...Sf3
      • 2.Qe4#
    • 1...Sxh3
      • 2.Qe4#
    • 1...Se4
      • 2.Qxe4#
    • 1...Se6
      • 2.Qf3#
      • 2.Qe4#
    • 1...Sgf7
      • 2.Qe4#
    • 1...Sh7
      • 2.Qe4#
  • Tries
    • 1.Qe7?
      • threat
        • 2.Qd6#
        • 2.Qxd7#
      • 1...Be6
        • 2.Qd6#
      • 1...Rf6
        • 2.Qe5#
      • 1...Rf7
        • 2.Qd6#
        • 2.Qe5#
      • 1...Bc8
        • 2.Qd6#
      • 1...Be8
        • 2.Qd6#
      • 1...Se4
        • 2.Qxe4#
      • 1...Sgf7
        • 2.Qe4#
      • 1...Shf7!
  • Keys
    • 1.Se4!
      • threat
        • 2.Sc3#
      • 1...Ke6
        • 2.Qa2#
      • 1...Sxe4
        • 2.Qa2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 8
  • Sets
    • R(d);N_GUARD::QAR1(C),XR(d)
    • R(d);N_GUARD::QAR1(C)
    • S(e);N_GUARD::QAB1(C)
    • S(e);N_GUARD,XB(E)::QAB1(C)
    • S(e);N_GUARD::QAB1(C),XS(e)
  • Tries
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • B(h);::QAR1(C)
        • R(d);N_GUARD::QAR1(C)
        • S(e);N_GUARD::QAB1(C),XS(e)
        • S(e);N_GUARD::QAB1(C)
      • Refutation
        • S(g);
  • Actual
    • S(B);
    • Threat
      • S(B)
    • Vars
      • K(c);P_SPINR(d),S_FLIGHT::QAB(C)
      • S(e);SBLOCK,XS(B)::QAB(C)
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