MESON Chess Problem Database

Problem Display
PID: 220382 (5r2/1n5B/1n2P3/8/QNN2k1K/b4p2/r4p2/5b2 w - - 0 1)

Gold, Samuel

English Mechanic and World of Science, 1875

(First published on Fri Aug 13 1875)

5r2/1n5B/1n2P3/8/QNN2k1K/b4p2/r4p2/5b2

#2

6 + 9

15239 Valois Notebooks 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Re2
      • 2.Sd3#
    • 1...Bg2
      • 2.Sd3#
    • 1...Bd3
      • 2.Sxd3#
    • 1...Bh3
      • 2.Sd3#
    • 1...Sxa4
      • 2.Sd5#
    • 1...Sd5
      • 2.Sxd5#
    • 1...Sd7
      • 2.Sd5#
    • 1...Sa8
      • 2.Sd5#
    • 1...Sc8
      • 2.Sd5#
  • Tries
    • 1.Qd1?
      • threat
        • 2.Qd4#
      • 1...Rd2
        • 2.Qxd2#
      • 1...Re2
        • 2.Sd3#
      • 1...Bd3
        • 2.Sxd3#
      • 1...Bb2
        • 2.Qd2#
      • 1...Sc5
        • 2.Qd6#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Rd8!
    • 1.Qb5?
      • threat
        • 2.Qe5#
        • 2.Qg5#
      • 1...Bxc4
        • 2.Qg5#
      • 1...Sxc4
        • 2.Qg5#
      • 1...Rf5
        • 2.Qxf5#
      • 1...Re2
        • 2.Sd3#
        • 2.Qg5#
      • 1...Rg8
        • 2.Qe5#
        • 2.Qf5#
      • 1...Bb2
        • 2.Qg5#
      • 1...Sd5
        • 2.Sxd5#
      • 1...Sd7
        • 2.Sd5#
        • 2.Qg5#
      • 1...Sc5!
    • 1.Qc6?
      • threat
        • 2.Qe4#
      • 1...Sc5
        • 2.Qd6#
        • 2.Qc7#
      • 1...Re2
        • 2.Sd3#
      • 1...Bd3
        • 2.Sxd3#
      • 1...Sd5
        • 2.Sxd5#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Rf5!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Qd4#
      • 1...Sxd7
        • 2.Sd5#
      • 1...Sc5
        • 2.Qd6#
        • 2.Qc7#
      • 1...Rd2
        • 2.Qxd2#
      • 1...Re2
        • 2.Sd3#
      • 1...Rd8
        • 2.Qf7#
      • 1...Bd3
        • 2.Sxd3#
      • 1...Bb2
        • 2.Qd2#
      • 1...Sd5
        • 2.Sxd5#
      • 1...Sd6
        • 2.Qxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • R(b);S_CUTB(a)::S(B)
    • B(a);N_GUARD::S(B)
    • B(a);N_GUARD::S(B),XB(a)
    • S(g);N_GUARD,XQ(A)::S(B)
    • S(g);N_GUARD::S(B),XS(g)
    • S(g);N_GUARD::S(B)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR2(A)
      • Vars
        • R(b);N_GUARD::QAB(A),XR(b)
        • R(b);S_CUTB(a)::S(B)
        • B(a);N_GUARD::S(B),XB(a)
        • B(d);S_CUTR(b)::QAB(A)
        • S(h);N_GUARD::QAB(A)
        • S(h);N_GUARD::QAB(A),XS(h)
      • Refutation
        • R(i);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);XS(C)::QAB1(A)
        • S(g);XS(C)::QAB1(A)
        • R(i);N_GUARD::QAR1(A),XR(i)
        • B(d);::QAB1(A)
        • S(g);N_GUARD::S(B),XS(g)
      • Refutation
        • S(h);
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • R(b);S_CUTB(a)::S(B)
        • B(a);N_GUARD::S(B),XB(a)
        • S(g);N_GUARD::S(B),XS(g)
        • S(h);N_GUARD::QAB(A),XS(h)
      • Refutation
        • R(i);
  • Actual
    • Q(A);
    • Threat
      • QAR2(A)
    • Vars
      • S(g);N_GUARD,XQ(A)::S(B)
      • R(b);N_GUARD::QAB(A),XR(b)
      • R(b);S_CUTB(a)::S(B)
      • R(i);N_GUARD::QAR(A)
      • B(a);N_GUARD::S(B),XB(a)
      • B(d);S_CUTR(b)::QAB(A)
      • S(g);N_GUARD::S(B),XS(g)
      • S(h);N_GUARD::QAB(A),XS(h)
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