MESON Chess Problem Database

Problem Display
PID: 262047 (K7/PPB2p2/8/8/1Rq3B1/N2p4/1p1N4/2k5 w - - 0 1)

Biscoe, HT

The Field, 1887

(First published on Sat Apr 9 1887)

K7/PPB2p2/8/8/1Rq3B1/N2p4/1p1N4/2k5

#2

8 + 5

15239 Valois Notebooks 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qb3
      • 2.Sxb3#
    • 1...Qb5
      • 2.Sb3#
    • 1...Qa6
      • 2.Sb3#
    • 1...Qd4
      • 2.Sb3#
    • 1...Qe4
      • 2.Sb3#
    • 1...Qf4
      • 2.Sb3#
    • 1...Qc5
      • 2.Sb3#
    • 1...Qc6
      • 2.Sb3#
    • 1...Qxc7
      • 2.Sb3#
  • Keys
    • 1.Bf4!
      • threat
        • 2.Sb3#
        • 2.Rxc4#
      • 1...Qc8+
        • 2.bxc8Q#
        • 2.bxc8R#
      • 1...Qxb4
        • 2.Sb3#
      • 1...Qxf4
        • 2.Sb3#
      • 1...b1Q
        • 2.Rxb1#
      • 1...b1S
        • 2.Rxb1#
      • 1...b1B
        • 2.Rxb1#
      • 1...b1R
        • 2.Rxb1#
      • 1...Qa2
        • 2.Sb3#
      • 1...Qb3
        • 2.Sxb3#
      • 1...Qb5
        • 2.Sb3#
      • 1...Qd5
        • 2.Sb3#
      • 1...Qa6
        • 2.Sb3#
      • 1...Qe6
        • 2.Sb3#
      • 1...Qc2
        • 2.Sb3#
      • 1...Qc3
        • 2.Sb3#
      • 1...Qd4
        • 2.Sb3#
      • 1...Qe4
        • 2.Sb3#
      • 1...Qc5
        • 2.Sb3#
      • 1...Qc6
        • 2.Sb3#
      • 1...Qc7
        • 2.Sb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
    • Q(d);N_GUARD::S(A),XQ(d)
    • Q(d);N_GUARD::S(A)
    • Q(d);N_GUARD,P_PINP(E)::S(A)
    • Q(d);N_GUARD,P_PINP(F)::S(A)
    • Q(d);N_GUARD,XB(G)::S(A)
  • Actual
    • B(G);
    • Threat
      • DUALS(2)
    • Vars
      • Q(d);CHECK,OGATE::PXQ(d)=Q
      • Q(d);XR(C)::B(G)+S(A),DCHECK
      • Q(d);XB(G)::S(A)
      • P(b);OGATE::R1(C),XQ(b)
      • P(b);OGATE::R1(C),XS(b)
      • P(b);OGATE::R1(C),XB(b)
      • P(b);OGATE::R1(C),XR(b)
      • Q(d);::B(G)+S(A),DCHECK
      • Q(d);::B(G)+S(A),DCHECK,XQ(d)
      • Q(d);P_PINP(F)::B(G)+S(A),DCHECK
      • Q(d);P_PINP(E)::B(G)+S(A),DCHECK
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