MESON Chess Problem Database

Problem Display
PID: 142498 (4Q2K/bP6/q2Ppp2/4NP2/pP1kP1P1/N2Bp3/1P5B/n5n1 w - - 0 1)

Nield, Joshua

Western Daily Mercury, 1903

4Q2K/bP6/q2Ppp2/4NP2/pP1kP1P1/N2Bp3/1P5B/n5n1

#2

13 + 9

14867 BCPS Library 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Qb5
      • 2.Sxb5#
    • 1...Qxd6
      • 2.Sb5#
    • 1...Sc2
      • 2.Sxc2#
    • 1...Sb3
      • 2.Sc2#
  • Tries
    • 1.Qxe6?
      • threat
        • 2.Qd5#
      • 1...Qxb7
        • 2.Qc4#
      • 1...Qxd6
        • 2.Sb5#
        • 2.Qc4#
        • 2.Qxd6#
      • 1...e2
        • 2.Bxg1#
      • 1...Qc4
        • 2.Qxc4#
      • 1...Qb5
        • 2.Sxb5#
      • 1...Qa5
        • 2.Qc4#
      • 1...Qc6!
  • Keys
    • 1.Qb5!
      • 1...Qxb5
        • 2.Sxb5#
      • 1...Qxb7
        • 2.Qc4#
      • 1...Qxd6
        • 2.Qc4#
      • 1...exf5
        • 2.Qd5#
      • 1...fxe5
        • 2.Bxe5#
      • 1...e2
        • 2.Bxg1#
      • 1...Qa5
        • 2.Sc6#
        • 2.Qc4#
      • 1...Qb6
        • 2.Qc4#
      • 1...Qc6
        • 2.Sxc6#
      • 1...Bc5
        • 2.Qxc5#
      • 1...Bb6
        • 2.Sc6#
      • 1...Bb8
        • 2.Qc5#
      • 1...Sc2
        • 2.Sxc2#
      • 1...Sb3
        • 2.Sc2#
      • 1...Se2
        • 2.Sf3#
      • 1...Sf3
        • 2.Sxf3#
      • 1...Sh3
        • 2.Sf3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 12
    • REMOVED MATES = 0
  • Sets
    • Q(f);N_GUARD::S(C),XQ(f)
    • Q(f);N_GUARD,XP(J)::S(C)
    • S(a);N_GUARD::S(C),XS(a)
    • S(a);N_GUARD::S(C)
  • Tries
    • Try
      • Q(L);XP(g)
      • Threat
        • QAR1(L)
      • Vars
        • Q(f);N_GUARD,XP(K)::QAR1(L)
        • P(c);OGATEB::B(B),XS(b)
        • Q(f);N_GUARD::QAR1(L),XQ(f)
        • Q(f);N_GUARD::S(C),XQ(f)
        • Q(f);N_GUARD::QAR1(L)
      • Refutation
        • Q(f);
  • Actual
    • Q(L);
    • Vars
      • Q(f);XQ(L)::S(C),XQ(f)
      • Q(f);N_GUARD,XP(K)::QAR1(L)
      • Q(f);N_GUARD,XP(J)::QAR1(L)
      • P(g);N_GUARD,XP(I)::QAR1(L)
      • P(h);OGATE,XS(H)::B(B),XP(h)
      • P(c);OGATEB::B(B),XS(b)
      • Q(f);N_GUARD::QAR1(L)
      • Q(f);N_GUARD::S(H),XQ(f)
      • B(i);N_GUARD::QAB1(L),XB(i)
      • B(i);S_CUTQ(f)::S(H)
      • B(i);N_GUARD::QAB1(L)
      • S(a);N_GUARD::S(C),XS(a)
      • S(a);N_GUARD::S(C)
      • S(b);N_GUARD::S(H)
      • S(b);N_GUARD::S(H),XS(b)
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