MESON Chess Problem Database

Problem Display
PID: 223267 (qNN3K1/p1p5/4kP1R/4p3/3b2P1/8/b4r1B/1BQ1R3 w - - 0 1)

Pierce, James

English Mechanic and World of Science, 1886

(First published on Fri Jan 29 1886)

qNN3K1/p1p5/4kP1R/4p3/3b2P1/8/b4r1B/1BQ1R3

#2

10 + 8

6490 yacpdb 2020
15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qc6
      • 2.Qxc6#
    • 1...Qxb8
      • 2.Qc6#
    • 1...Bc5
      • 2.Rxe5#
    • 1...Bb6
      • 2.Rxe5#
  • Tries
    • 1.Bxa2+?
      • 1...Qd5
        • 2.Qc6#
      • 1...Rxa2!
    • 1.Qxc7?
      • threat
        • 2.Qd6#
        • 2.Qd7#
        • 2.Qf7#
      • 1...Qxb8
        • 2.Qf7#
      • 1...Qd5
        • 2.Qe7#
        • 2.Qf7#
      • 1...Qc6
        • 2.Qxc6#
        • 2.Qf7#
      • 1...Qb7
        • 2.Qd6#
      • 1...Bc5
        • 2.Rxe5#
        • 2.Qxe5#
        • 2.Qd7#
        • 2.Qf7#
      • 1...Kd5!
    • 1.f7+?
      • 1...Kd5
        • 2.Se7#
        • 2.Be4#
      • 1...Rf6!
  • Keys
    • 1.Bg6!
      • threat
        • 2.Bf7#
      • 1...Kxf6+
        • 2.Bf7#
      • 1...Kd5
        • 2.Bf7#
      • 1...Qxb8
        • 2.Qc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • Q(h);N_GUARD::QAR2(B),XQ(h)
    • Q(h);N_GUARD,P_PINS(I),XS(H)::QAR2(B)
    • B(c);N_GUARD::R1(C),XP(d)
  • Tries
    • Try
      • B(A);CHECK,XB(a)
      • Vars
        • Q(h);P_SPINQ(h)::QAR2(B)
      • Refutation
        • R(b);XB(A)
    • Try
      • Q(B);XP(g)
      • Threat
        • DUALS(3)
      • Vars
        • Q(h);P_PINS(I),XS(H)::QAB1(B)
        • Q(h);::QAR1(B)
      • Refutation
        • K(e);N_SPINP(d),S_FLIGHT
    • Try
      • P(F);CHECK
      • Refutation
        • R(b);P_SPINR(b)
  • Actual
    • B(A);
    • Threat
      • B(A)
    • Vars
      • K(e);CHECK,N_SPINP(d),P-FLIGHT,XP(F)::R(G)+B(A)
      • K(e);N_SPINP(d),S_FLIGHT::B(A)
      • Q(h);N_GUARD,P_PINS(I),XS(H)::QAR2(B)
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