MESON Chess Problem Database

Problem Display
PID: 224304 (8/8/4p3/2p5/1pkN4/4RQ2/1K6/8 w - - 0 1)

Rockwell, Almon Ferdinand

Brownson's Chess Journal, 1887

8/8/4p3/2p5/1pkN4/4RQ2/1K6/8

#2

4 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd4
      • 2.Qe4#
    • 1...cxd4
      • 2.Qc6#
  • Tries
    • 1.Qe2+?
      • 1...Kxd4
        • 2.Qd3#
      • 1...Kd5!
    • 1.Qf1+?
      • 1...Kxd4
        • 2.Qd3#
      • 1...Kd5!
  • Keys
    • 1.Re5!
      • 1...Kxd4
        • 2.Qe4#
      • 1...cxd4
        • 2.Qb3#
      • 1...b3
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);OGATEB,P-FLIGHT,XS(D)::QAR1(C)
    • P(c);OGATEB,SBLOCK,XS(D)::QAR2(C)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);P-FLIGHT,XS(D)::QAR1(C)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);P-FLIGHT,XS(D)::QAR1(C)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • R(B);
    • Vars
      • K(b);OGATEB,P-FLIGHT,XS(D)::QAR1(C)
      • P(c);SBLOCK,XS(D)::QAB1(C)
      • P(a);N_GUARD::QAR1(C)
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