MESON Chess Problem Database

Problem Display
PID: 208751 (1nR5/8/R1p5/5K2/3k4/1Q6/3P4/8 w - - 0 1)

Carpenter, George Edward

Dubuque Chess Journal, 1875

1nR5/8/R1p5/5K2/3k4/1Q6/3P4/8

#2

5 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...c5
      • 2.Rd6#
  • Tries
    • 1.Rcxc6?
      • threat
        • 2.Ra4#
        • 2.Qc4#
      • 1...Sxa6
        • 2.Qc4#
      • 1...Sxc6!
    • 1.Rxb8?
      • 1...c5
        • 2.Rd6#
        • 2.Rd8#
      • 1...Kc5!
    • 1.Rd8+?
      • 1...Kc5
        • 2.Ra5#
        • 2.d4#
      • 1...Sd7!
  • Keys
    • 1.Qb5!
      • threat
        • 2.Ra4#
      • 1...Sxa6
        • 2.Rd8#
      • 1...cxb5
        • 2.Rd6#
      • 1...c5
        • 2.Rd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(b);OGATE::R(D)
  • Tries
    • Try
      • R(E);XP(b)
      • Threat
        • DUALS(2)
      • Vars
        • S(c);XR(D)::QAR1(B)
      • Refutation
        • S(c);XR(E)
    • Try
      • R(E);XS(c)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(E);CHECK
      • Refutation
        • S(c);P_SPINS(c)
  • Actual
    • Q(B);
    • Threat
      • R(D)
    • Vars
      • S(c);N_GUARD,XR(D)::R(E)
      • P(b);OGATE,XQ(B)::R(D)
      • P(b);OGATE::R(D)
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