MESON Chess Problem Database

Problem Display
PID: 224383 (n6Q/4B1r1/q7/4kp2/1R3N1b/2Pp2R1/2n3B1/2N4K w - - 0 1)

Meredith, William

Brownson's Chess Journal, 1887

n6Q/4B1r1/q7/4kp2/1R3N1b/2Pp2R1/2n3B1/2N4K

#2

9 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qb7
      • 2.Scxd3#
    • 1...Qc8
      • 2.Scxd3#
    • 1...Qa2
      • 2.Scxd3#
    • 1...Qa3
      • 2.Scxd3#
    • 1...Qa4
      • 2.Scxd3#
    • 1...Qa5
      • 2.Scxd3#
    • 1...Qb6
      • 2.Scxd3#
    • 1...Qc6
      • 2.Scxd3#
    • 1...Qe6
      • 2.Scxd3#
      • 2.Sfxd3#
    • 1...Qf6
      • 2.Scxd3#
    • 1...Qg6
      • 2.Scxd3#
    • 1...Qh6
      • 2.Scxd3#
    • 1...Qa7
      • 2.Scxd3#
    • 1...Sa1
      • 2.Re3#
    • 1...Se1
      • 2.Re3#
    • 1...Sa3
      • 2.Re3#
    • 1...Se3
      • 2.Rxe3#
    • 1...Sb6
      • 2.Qb8#
  • Tries
    • 1.Qxg7+?
      • 1...Qf6
        • 2.Scxd3#
      • 1...Bf6!
    • 1.Qb8+?
      • 1...Qd6
        • 2.Scxd3#
        • 2.Qxd6#
      • 1...Sc7!
  • Keys
    • 1.Rb6!
      • threat
        • 2.Sg6#
      • 1...Kxf4
        • 2.Bd6#
      • 1...Qxb6
        • 2.Scxd3#
      • 1...Sxb6
        • 2.Qb8#
      • 1...Bf6
        • 2.Bd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 15
  • Sets
    • Q(f);N_GUARD,P_PINB(C)::S(A),XP(b)
    • Q(f);N_GUARD::S(A),XP(b)
    • Q(f);N_GUARD,N_SPINR(g)::S(A),XP(b)
    • S(a);N_GUARD::R(E)
    • S(a);N_GUARD::R(E),XS(a)
    • S(h);N_GUARD,S_CUTQ(f)::QAB(I)
  • Tries
    • Try
      • Q(I);CHECK,XR(g)
      • Vars
        • Q(f);P_SPINQ(f)::S(A),XP(b)
      • Refutation
        • B(c);P_SPINB(c)
    • Try
      • Q(I);CHECK,N_PINR(g)
      • Refutation
        • S(h);P_SPINS(h)
  • Actual
    • R(F);
    • Threat
      • S(G)
    • Vars
      • K(d);N_SPINR(g),S_FLIGHT,XS(G)::B(H)
      • Q(f);N_GUARD,XR(F)::S(A),XP(b)
      • S(h);N_GUARD,XR(F)::QAB(I)
      • B(c);N_SPINR(g),SBLOCK::B(H)
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