MESON Chess Problem Database

Problem Display
PID: 175773 (4N3/4p3/6P1/3bpk1K/4p3/2Q1B3/7b/R7 w - - 0 1)

Ness, H

Philadelphia Times, 1898

4N3/4p3/6P1/3bpk1K/4p3/2Q1B3/7b/R7

#2

6 + 6

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Ke6
      • 2.Qc8#
  • Tries
    • 1.Bg5?
      • threat
        • 2.Sg7#
        • 2.Qh3#
      • 1...Ke6
        • 2.Qh3#
        • 2.Qc8#
      • 1...Bg3
        • 2.Sg7#
      • 1...e3!
    • 1.Rf1+?
      • 1...Ke6
        • 2.Qc8#
      • 1...Bf4!
  • Keys
    • 1.Bf4!
      • threat
        • 2.Qxe5#
      • 1...Kxf4
        • 2.Rf1#
      • 1...Ke6
        • 2.Qh3#
        • 2.Qc8#
      • 1...Bxf4
        • 2.Qh3#
      • 1...exf4
        • 2.Sg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • K(e);S_FLIGHT::QAB(B)
  • Tries
    • Try
      • B(C);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::S(F)
      • Refutation
        • P(b);
    • Try
      • R(A);CHECK
      • Vars
        • K(e);S_FLIGHT::QAB(B)
      • Refutation
        • B(a);P_SPINB(a)
  • Actual
    • B(C);
    • Threat
      • QAR1(B),XP(d)
    • Vars
      • K(e);OGATEB,P-FLIGHT,XB(C)::R(A)
      • B(a);SBLOCK,XB(C)::QAB(B)
      • P(d);SBLOCK,XB(C)::S(F)
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