MESON Chess Problem Database

Problem Display
PID: 258900 (1b1N1r2/1Kn2B2/2R5/1p2k1B1/5R2/2nqNb2/1Q6/8 w - - 0 1)

Doney, J

Western Morning News, 1922

(First published on Sat Jan 21 1922)

1b1N1r2/1Kn2B2/2R5/1p2k1B1/5R2/2nqNb2/1Q6/8

#2

8 + 8

15239 Valois Notebooks 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Qxc3#
    • 1...Qf1
      • 2.Qxc3#
    • 1...Qe2
      • 2.Qxc3#
    • 1...Qf5
      • 2.Qxc3#
    • 1...Qg6
      • 2.Qxc3#
    • 1...Qh7
      • 2.Qxc3#
    • 1...Rxf7
      • 2.Sxf7#
    • 1...Bh1
      • 2.Sg4#
    • 1...Bg2
      • 2.Sg4#
    • 1...Bg4
      • 2.Sxg4#
    • 1...Bd5
      • 2.Sg4#
    • 1...Sd5
      • 2.Re6#
  • Tries
    • 1.Qxc3+?
      • 1...Qd4
        • 2.Qxd4#
      • 1...Qxc3!
  • Keys
    • 1.Qb4!
      • threat
        • 2.Bf6#
      • 1...Bxc6+
        • 2.Sxc6#
      • 1...Qxd8
        • 2.Rf5#
      • 1...Rxf7
        • 2.Sxf7#
      • 1...Qc4
        • 2.Qd6#
      • 1...Qe4
        • 2.Qd6#
      • 1...Qf5
        • 2.Rxf5#
        • 2.Qxc3#
        • 2.Qd6#
        • 2.Qd4#
      • 1...Qg6
        • 2.Qxc3#
        • 2.Qd4#
      • 1...Qd4
        • 2.Qxd4#
      • 1...Qd6
        • 2.Rf5#
        • 2.Qxd6#
      • 1...Be4
        • 2.Sg4#
      • 1...Se4
        • 2.Rf5#
      • 1...S3d5
        • 2.Qd6#
      • 1...S7d5
        • 2.Re6#
      • 1...Se8
        • 2.Qe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 10
  • Sets
    • Q(b);N_GUARD::QAB(A),XS(a)
    • R(h);XB(G)::S(H),XR(h)
    • B(c);N_GUARD::S(B)
    • B(c);N_GUARD,N_PINR(E)::S(B),XB(c)
    • S(f);N_PINR(E)::R1(E)
  • Tries
    • Try
      • Q(A);CHECK,XS(a)
      • Vars
        • Q(b);N_GUARD,P_SPINQ(b)::QAB1(A),XQ(b)
      • Refutation
        • Q(b);XQ(A)
  • Actual
    • Q(A);N_PINS(a)
    • Threat
      • B(D)
    • Vars
      • B(c);CHECK,XR(E)::S(H),XB(c)
      • Q(b);N_GUARD,XS(H)::R1(C)
      • R(h);XB(G)::S(H),XR(h)
      • Q(b);N_GUARD::QAB1(A)
      • Q(b);N_GUARD::QAB1(A),XQ(b)
      • B(c);N_GUARD::S(B)
      • S(a);N_PINR(E),S_CUTQ(b)::R1(C)
      • S(a);N_PINR(E),S_CUTQ(b)::QAB1(A)
      • S(f);N_PINR(E)::R1(E)
      • S(f);N_GUARD::QAR2(A)
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