MESON Chess Problem Database

Problem Display
PID: 214791 (8/1nQK4/2B5/2b5/2k5/2p5/1PPP4/8 w - - 0 1)

Mudge, Louis W

Scientific American Supplement, 1877

8/1nQK4/2B5/2b5/2k5/2p5/1PPP4/8

#2

6 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qf4#
  • Tries
    • 1.Qa5?
      • threat
        • 2.Qxc3#
      • 1...Kd4
        • 2.Qxc3#
      • 1...cxb2
        • 2.Qc3#
      • 1...cxd2
        • 2.Qc3#
      • 1...Bb4
        • 2.Qd5#
      • 1...Bd4
        • 2.Bd5#
        • 2.Qb5#
        • 2.b3#
        • 2.d3#
      • 1...Sxa5!
    • 1.b3+?
      • 1...Kd4
        • 2.Qf4#
      • 1...Kb4!
    • 1.d3+?
      • 1...Kd4
        • 2.Qf4#
      • 1...Kb4!
  • Keys
    • 1.Qe5!
      • threat
        • 2.Qxc3#
      • 1...Kb4
        • 2.Qxc3#
      • 1...cxb2
        • 2.Qc3#
      • 1...cxd2
        • 2.Qc3#
      • 1...Bb4
        • 2.Bb5#
        • 2.Qd5#
        • 2.b3#
        • 2.d3#
      • 1...Bd4
        • 2.Qb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • K(b);P-FLIGHT::QAR2(E)
  • Tries
    • Try
      • Q(E);
      • Threat
        • QAR1(E),XP(a)
      • Vars
        • K(b);P-FLIGHT::QAB1(E),XP(a)
        • P(a);XP(A)::QAR1(E)
        • P(a);XP(C)::QAR1(E)
        • B(c);OGATE,SBLOCK::QAB1(E)
      • Refutation
        • S(d);XQ(E)
    • Try
      • P(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR2(E)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • P(C);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR2(E)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(E);
    • Threat
      • QAR1(E),XP(a)
    • Vars
      • K(b);P-FLIGHT::QAB1(E),XP(a)
      • P(a);XP(A)::QAR1(E)
      • P(a);XP(C)::QAR1(E)
      • B(c);OGATE,SBLOCK::QAB1(E)
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