MESON Chess Problem Database

Problem Display
PID: 222669 (3R4/r2r4/RNpk4/B4p2/5KN1/2P5/1Q6/8 w - - 0 1)

Keeney, Ebenezer Wood

Cincinnati Commercial, 1883

3R4/r2r4/RNpk4/B4p2/5KN1/2P5/1Q6/8

#2

8 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Qb4#
    • 1...Kc7
      • 2.Sc4#
      • 2.Sc8#
  • Tries
    • 1.Rxd7+?
      • 1...Kc5
        • 2.Qb4#
      • 1...Ke6
        • 2.Qa2#
        • 2.Qe2#
        • 2.Qb3#
      • 1...Rxd7!
  • Keys
    • 1.c4!
      • threat
        • 2.Qe5#
      • 1...Kc5
        • 2.Bb4#
      • 1...Ke6
        • 2.Qf6#
      • 1...Kc7
        • 2.Sc8#
      • 1...Ke7
        • 2.Qf6#
      • 1...c5
        • 2.Sc8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(c);N_SPINR(e),S_FLIGHT::QAB1(A)
  • Tries
    • Try
      • R(H);CHECK,XR(e)
      • Vars
        • K(c);S_FLIGHT::QAB1(A)
      • Refutation
        • R(d);XR(H)
  • Actual
    • P(B);
    • Threat
      • QAB1(A)
    • Vars
      • K(c);N_SPINR(e),S_FLIGHT::B(E)
      • K(c);N_SPINR(e),P-FLIGHT::QAR1(A)
      • K(c);N_SPINR(e),S_FLIGHT::B(E)+S(G)
      • K(c);N_SPINR(e),S_FLIGHT::QAB1(A)
      • P(b);SBLOCK::R(F)+S(G),DCHECK
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