MESON Chess Problem Database

Problem Display
PID: 224316 (1b6/5n1B/8/8/5knQ/3Rp3/1N2P3/K7 w - - 0 1)

Pierce, James

Brownson's Chess Journal, 1887

1b6/5n1B/8/8/5knQ/3Rp3/1N2P3/K7

#2

6 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Se5
      • 2.Rd4#
  • Tries
    • 1.Rd1?
      • threat
        • 2.Sd3#
      • 1...Be5
        • 2.Rf1#
      • 1...Se5
        • 2.Rd4#
      • 1...Ke5!
    • 1.Rd5?
      • threat
        • 2.Sd3#
      • 1...Se5
        • 2.Rd4#
      • 1...Be5!
    • 1.Qxg4+?
      • 1...Ke5
        • 2.Qf5#
      • 1...Kxg4!
  • Keys
    • 1.Rd6!
      • threat
        • 2.Sd3#
      • 1...Ke5
        • 2.Qg3#
      • 1...Se5
        • 2.Rd4#
        • 2.Rf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • S(d);SBLOCK::R(D)
  • Tries
    • Try
      • R(D);
      • Threat
        • S(B)
      • Vars
        • B(e);P_PINS(B),SBLOCK::R(D)
        • S(d);SBLOCK::R(D)
      • Refutation
        • K(b);N_SPINS(c),S_FLIGHT
    • Try
      • R(D);
      • Threat
        • S(B)
      • Vars
        • S(d);SBLOCK::R(D)
      • Refutation
        • B(e);P_PINS(B)
    • Try
      • Q(E);CHECK,XS(c)
      • Vars
        • K(b);S_FLIGHT::QAR1(E)
      • Refutation
        • K(b);P-FLIGHT,XQ(E)
  • Actual
    • R(D);
    • Threat
      • S(B)
    • Vars
      • K(b);N_SPINS(c),S_FLIGHT::QAB(E)
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