MESON Chess Problem Database

Problem Display
PID: 4653 (8/6K1/3k4/3N1P2/Q2R4/8/8/8 w - - 0 1)

Greenshields, EB

Prize, Ottawa Citizen (Few Piece Ty.), 1885

8/6K1/3k4/3N1P2/Q2R4/8/8/8

#2

5 + 1

4774 Canadian Chess Problems 1890
145 StrateGems 1998
3248 Miniatures canadiennes 2000
4883 Still More Fun with Chess Miniatures 2002
56 The Problemist 2004
136 Problem Observer 2014

SOLUTION

  • SOUND
  • Tries
    • 1.Sb6+?
      • 1...Kc5
        • 2.Sd7#
      • 1...Ke5
        • 2.Rd5#
      • 1...Ke7
        • 2.Sc8#
        • 2.Qd7#
      • 1...Kc7!
    • 1.Sf6+?
      • 1...Kc5
        • 2.Sd7#
      • 1...Ke5
        • 2.Rd5#
      • 1...Ke7
        • 2.Sg8#
        • 2.Rd7#
        • 2.Qd7#
        • 2.Qe8#
        • 2.Qa3#
        • 2.Qb4#
        • 2.Qa7#
      • 1...Kc7!
    • 1.Rd1?
      • 1...Ke5
        • 2.Qf4#
      • 1...Kc5!
    • 1.Rd2?
      • 1...Ke5
        • 2.Qf4#
      • 1...Kc5!
    • 1.Rd3?
      • 1...Ke5
        • 2.Qf4#
      • 1...Kc5!
    • 1.Qc6+?
      • 1...Ke5
        • 2.Qf6#
      • 1...Kxc6!
    • 1.Qa6+?
      • 1...Kc5
        • 2.Qb6#
      • 1...Ke5
        • 2.Qf6#
      • 1...Kd7!
  • Keys
    • 1.Se7+!
      • 1...Kc5
        • 2.Qb4#
      • 1...Ke5
        • 2.Rd5#
      • 1...Kc7
        • 2.Qa7#
      • 1...Kxe7
        • 2.Qd7#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(a);S_FLIGHT::S(C)
        • K(a);S_FLIGHT::R1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(C);CHECK
      • Vars
        • K(a);S_FLIGHT::S(C)
        • K(a);S_FLIGHT::R1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(B);
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(B);
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(B);
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
        • K(a);OGATE,S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • S(C);CHECK
    • Vars
      • K(a);S_FLIGHT::QAB1(A)
      • K(a);S_FLIGHT::R1(B)
      • K(a);S_FLIGHT::QAR2(A)
      • K(a);S_FLIGHT,XS(C)::QAR1(A)
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