MESON Chess Problem Database

Problem Display
PID: 224275 (4n1Q1/8/1K1p4/3N4/2kp1R2/8/2P5/8 w - - 0 1)

Teed, Frank Melville

Columbia Chess Chronicle, 1888

4n1Q1/8/1K1p4/3N4/2kp1R2/8/2P5/8

#2

5 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Se3+?
      • 1...Kb4
        • 2.Qb3#
      • 1...Kc3!
    • 1.Rf5?
      • 1...d3
        • 2.Rf4#
        • 2.Qg4#
      • 1...Sf6
        • 2.Qc8#
      • 1...Sg7
        • 2.Qc8#
      • 1...Sc7!
    • 1.Rf8?
      • 1...d3
        • 2.Rf4#
      • 1...Sf6
        • 2.Rc8#
      • 1...Sg7
        • 2.Rc8#
      • 1...Sc7!
  • Keys
    • 1.Rf7!
      • 1...Kxd5
        • 2.Re7#
      • 1...d3
        • 2.Rf4#
      • 1...Sc7
        • 2.Rxc7#
      • 1...Sf6
        • 2.Rc7#
      • 1...Sg7
        • 2.Rc7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAR1(E)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • R(B);N_PINP(b)
      • Vars
        • S(d);OGATE::QAR(E)
      • Refutation
        • S(d);
    • Try
      • R(B);N_PINP(b)
      • Vars
        • P(b);OGATEB::R(B)
        • S(d);OGATE::R(B)
      • Refutation
        • S(d);
  • Actual
    • R(B);N_PINP(b)
    • Vars
      • K(a);OGATEB,S_FLIGHT,XS(C)::QAB(E)+R(B)
      • P(b);OGATEB::R(B)
      • S(d);N_GUARD::R(B),XS(d)
      • S(d);N_GUARD::R(B)
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