MESON Chess Problem Database

Problem Display
PID: 231771 (8/8/4p3/1K1p2Qn/3k2N1/1p2rP2/1P6/1B4b1 w - - 0 1)

Pierce, James

Pen & Pencil, 1889

(First published on Sat Jul 6 1889)

8/8/4p3/1K1p2Qn/3k2N1/1p2rP2/1P6/1B4b1

#2

6 + 7

15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Re1
      • 2.Qd2#
    • 1...Rc3
      • 2.Qe5#
    • 1...Rd3
      • 2.Qe5#
    • 1...Rxf3
      • 2.Qe5#
    • 1...Re4
      • 2.Qd2#
    • 1...Re5
      • 2.Qd2#
      • 2.Qxe5#
    • 1...Bh2
      • 2.Qxe3#
  • Tries
    • 1.Se5?
      • threat
        • 2.Sc6#
      • 1...Rxe5
        • 2.Qd2#
      • 1...Rc3!
    • 1.Qf4+?
      • 1...Re4
        • 2.Qd2#
      • 1...Sxf4!
    • 1.Qf6+?
      • 1...Re5
        • 2.Qxe5#
      • 1...e5
        • 2.Qb6#
      • 1...Sxf6!
    • 1.Qg7+?
      • 1...Re5
        • 2.Qxe5#
        • 2.Qa7#
      • 1...Sf6
        • 2.Qa7#
      • 1...e5
        • 2.Qa7#
      • 1...Sxg7!
  • Keys
    • 1.Be4!
      • threat
        • 2.Qe5#
      • 1...Rxe4
        • 2.Qd2#
      • 1...dxe4
        • 2.Qd8#
      • 1...Bh2
        • 2.Qxe3#
      • 1...e5
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • R(c);OGATE::QAR2(F)
    • R(c);N_GUARD::QAB1(F)
    • R(c);N_GUARD,XP(C)::QAB1(F)
    • B(a);N_GUARD::QAB1(F),XR(c)
  • Tries
    • Try
      • S(D);
      • Threat
        • S(D)
      • Vars
        • R(c);OGATE,SBLOCK,XS(D)::QAR2(F)
      • Refutation
        • R(c);
    • Try
      • Q(F);CHECK
      • Vars
        • R(c);OGATE,P_SPINR(c)::QAR2(F)
      • Refutation
        • S(f);XQ(F)
    • Try
      • Q(F);CHECK
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::QAB1(F),XR(c)
        • P(g);OGATE,P_SPINP(g)::QAB(F)
      • Refutation
        • S(f);XQ(F)
    • Try
      • Q(F);CHECK
      • Vars
        • S(f);P_SPINS(f)::QAB(F)
        • P(g);P_SPINP(g)::QAB(F)
      • Refutation
        • S(f);XQ(F)
  • Actual
    • B(A);
    • Threat
      • QAB1(F)
    • Vars
      • R(c);OGATE,XB(A)::QAR2(F)
      • P(e);OGATEB,XB(A)::QAR(F)
      • B(a);N_GUARD::QAB1(F),XR(c)
      • P(g);::QAB1(F),XP(g)
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