MESON Chess Problem Database

Problem Display
PID: 231722 (2N5/8/p1n2N2/rbkP4/p2n2R1/P2B3K/8/1Q6 w - - 0 1)

Kidson, Frank

English Mechanic and World of Science, 1880

(First published on Fri Jan 30 1880)

2N5/8/p1n2N2/rbkP4/p2n2R1/P2B3K/8/1Q6

#2

8 + 7

15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bc4
      • 2.Qb6#
    • 1...Sb4
      • 2.Qxb4#
      • 2.axb4#
    • 1...Se5
      • 2.Qb4#
    • 1...Sa7
      • 2.Qb4#
    • 1...Se7
      • 2.Qb4#
    • 1...Sb8
      • 2.Qb4#
    • 1...Sd8
      • 2.Qb4#
  • Tries
    • 1.Rxd4?
      • 1...Bxd3
        • 2.Qb6#
      • 1...Sxd4
        • 2.Qb4#
      • 1...Bc4
        • 2.Rxc4#
        • 2.Qb6#
      • 1...Sb4
        • 2.Qxb4#
      • 1...Se5
        • 2.Qb4#
      • 1...Sa7
        • 2.Qb4#
      • 1...Se7
        • 2.Qb4#
      • 1...Sb8
        • 2.Qb4#
      • 1...Sd8
        • 2.Qb4#
      • 1...Kxd4!
    • 1.Qc2+?
      • 1...Bc4
        • 2.Qxc4#
      • 1...Sxc2!
    • 1.Qc1+?
      • 1...Bc4
        • 2.Qxc4#
      • 1...Sc2!
  • Keys
    • 1.Bc4!
      • 1...Kxc4
        • 2.Qc2#
      • 1...Bxc4
        • 2.Qb6#
      • 1...Sc2
        • 2.Sd7#
      • 1...Se2
        • 2.Sd7#
      • 1...Sb3
        • 2.Sd7#
      • 1...Sf3
        • 2.Sd7#
      • 1...Sf5
        • 2.Sd7#
      • 1...Se6
        • 2.Sd7#
      • 1...Sb4
        • 2.Qxb4#
      • 1...Se5
        • 2.Qb4#
      • 1...Sa7
        • 2.Qb4#
      • 1...Se7
        • 2.Qb4#
      • 1...Sb8
        • 2.Qb4#
      • 1...Sd8
        • 2.Qb4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • B(d);OGATE::QAB1(A)
    • S(g);N_GUARD::QAB1(A)
  • Tries
    • Try
      • R(E);XS(b)
      • Vars
        • B(d);OGATE,XB(C)::QAB1(A)
        • S(g);N_GUARD,XR(E)::QAB1(A)
        • S(g);N_GUARD::QAB1(A),XS(g)
        • S(g);N_GUARD::QAB1(A)
      • Refutation
        • K(e);S_FLIGHT,XR(E)
    • Try
      • Q(A);CHECK
      • Vars
        • B(d);N_GUARD,P_SPINB(d)::QAR1(A),XB(d)
      • Refutation
        • S(b);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • B(d);N_GUARD,P_SPINB(d)::QAR1(A),XB(d)
      • Refutation
        • S(b);P_SPINS(b)
  • Actual
    • B(C);
    • Vars
      • K(e);OGATEB,P-FLIGHT,P_SPINS(b),XB(C)::QAR2(A)
      • B(d);OGATE,SBLOCK,XB(C)::QAB1(A)
      • S(b);::S(G)
      • S(g);N_GUARD::QAB1(A),XS(g)
      • S(g);N_GUARD::QAB1(A)
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