MESON Chess Problem Database

Problem Display
PID: 224535 (1N4nB/1Pq2b2/R3pPRp/p3k3/P1P1p3/N3Q1PB/8/b4K2 w - - 0 1)

Bolus, Andrew

English Mechanic and World of Science, 1887

(First published on Fri Feb 18 1887)

1N4nB/1Pq2b2/R3pPRp/p3k3/P1P1p3/N3Q1PB/8/b4K2

#2

13 + 9

6490 yacpdb 2020
15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb8
      • 2.Qc5#
    • 1...Qc5
      • 2.Sd7#
      • 2.Qxc5#
    • 1...Qd7
      • 2.Sxd7#
    • 1...Bc3
      • 2.Qxc3#
    • 1...Bd4
      • 2.Qf4#
    • 1...Bxg6
      • 2.Rxe6#
    • 1...Be8
      • 2.Rxe6#
    • 1...Sxf6
      • 2.Bxf6#
    • 1...Se7
      • 2.fxe7#
    • 1...h5
      • 2.Rg5#
  • Keys
    • 1.Qd2!
      • 1...Qxc4+
        • 2.Sxc4#
      • 1...Qxb8
        • 2.Rxa5#
      • 1...Qxb7
        • 2.Qd6#
      • 1...Bxg6
        • 2.Rxe6#
      • 1...Sxf6
        • 2.Bxf6#
      • 1...e3
        • 2.Qxe3#
      • 1...Qb6
        • 2.Sd7#
      • 1...Qd6
        • 2.Qxd6#
      • 1...Qd8
        • 2.Sc6#
      • 1...Qc5
        • 2.Sd7#
      • 1...Qc6
        • 2.Sxc6#
      • 1...Qd7
        • 2.Sxd7#
      • 1...Qe7
        • 2.Sc6#
      • 1...Qc8
        • 2.Qd6#
      • 1...Bb2
        • 2.Qxb2#
      • 1...Bc3
        • 2.Qxc3#
      • 1...Bd4
        • 2.Qf4#
      • 1...Be8
        • 2.Rxe6#
      • 1...Se7
        • 2.fxe7#
      • 1...h5
        • 2.Rg5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
    • Q(g);N_GUARD,XS(L)::QAR2(C)
    • Q(g);N_GUARD::S(L),XQ(g)
    • B(a);N_GUARD::QAB(C),XB(a)
    • B(a);SBLOCK::QAB1(C)
    • B(h);N_GUARD,XR(J)::R1(H),XP(e)
    • B(h);N_GUARD::R1(H),XP(e)
    • S(i);OGATE,P_SPINS(i),XP(I)::B(M),XS(i)
    • S(i);OGATE::B(M)+P(I),XS(i)
    • P(f);N_GUARD::R(J)
  • Actual
    • Q(C);N_PINP(b)
    • Vars
      • Q(g);CHECK,XP(G)::S(B),XQ(g)
      • Q(g);N_GUARD,XS(L)::R(H),XP(c)
      • Q(g);N_GUARD,XP(K)::QAB1(C)
      • B(h);N_GUARD,XR(J)::R1(H),XP(e)
      • S(i);OGATE,P_SPINS(i),XP(I)::B(M),XS(i)
      • P(b);OGATEB::QAR2(C),XP(b)
      • Q(g);N_GUARD::S(L)
      • Q(g);N_GUARD::QAB1(C),XQ(g)
      • Q(g);N_GUARD::S(L),XQ(g)
      • Q(g);N_GUARD::QAB1(C)
      • B(a);N_GUARD::QAB(C),XB(a)
      • B(a);SBLOCK::QAB1(C)
      • B(h);N_GUARD::R1(H),XP(e)
      • S(i);OGATE::B(M)+P(I),XS(i)
      • P(f);N_GUARD::R(J)
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