MESON Chess Problem Database

Problem Display
PID: 222628 (4qb2/pbN2NB1/2p1Q2p/PBk5/8/n7/1P6/2K5 w - - 0 1)

Anonymous

English Mechanic and World of Science, 1883

(First published on Fri Jan 19 1883)

4qb2/pbN2NB1/2p1Q2p/PBk5/8/n7/1P6/2K5

#2

8 + 8

6490 yacpdb 2020
15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bd6
      • 2.Qxd6#
    • 1...Bxg7
      • 2.Qd6#
    • 1...Sb1
      • 2.Qc4#
    • 1...Sc2
      • 2.Qc4#
    • 1...Sc4
      • 2.Qxc4#
  • Tries
    • 1.Qd5+?
      • 1...Kb4
        • 2.Bc3#
      • 1...cxd5!
    • 1.Qe3+?
      • 1...Kb4
        • 2.Qxa3#
        • 2.Qc3#
      • 1...Qxe3+!
    • 1.Qe4?
      • threat
        • 2.Qd4#
        • 2.b4#
      • 1...Qxf7
        • 2.Qd4#
      • 1...Bxg7
        • 2.b4#
      • 1...Sxb5
        • 2.b4#
      • 1...cxb5
        • 2.b4#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Qd7
        • 2.b4#
      • 1...Qe5
        • 2.b4#
      • 1...Qd8
        • 2.b4#
      • 1...Sc2
        • 2.Qc4#
      • 1...Qxe4!
    • 1.Qe5+?
      • 1...Kb4
        • 2.Qc3#
      • 1...Qxe5!
  • Keys
    • 1.Bc3!
      • threat
        • 2.b4#
      • 1...Sc2
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 4
  • Sets
    • B(h);N_GUARD::QAB1(E),XB(h)
    • B(h);N_GUARD,XB(H)::QAB1(E)
    • S(a);N_GUARD::QAR1(E)
    • S(a);N_GUARD::QAR1(E),XS(a)
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • K(b);S_FLIGHT::B(H)
      • Refutation
        • P(c);XQ(E)
    • Try
      • Q(E);CHECK
      • Refutation
        • Q(g);CHECK,XQ(E)
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Vars
        • Q(g);XS(G)::QAB1(E)
        • B(h);XB(H)::P(B)
        • S(a);XB(D)::P(B)
        • P(c);XB(D)::P(B)
        • S(a);N_GUARD::QAR1(E),XS(a)
        • Q(g);::P(B)
        • S(a);N_GUARD::QAR1(E)
      • Refutation
        • Q(g);XQ(E)
    • Try
      • Q(E);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB1(E)
      • Refutation
        • Q(g);XQ(E)
  • Actual
    • B(H);
    • Threat
      • P(B)
    • Vars
      • S(a);N_GUARD::QAR1(E)
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