MESON Chess Problem Database

Problem Display
PID: 2378 (3R3K/4n3/4NPk1/5RPp/3P3p/7P/B2P2Q1/8 w - - 0 1)

Greenshields, EB

Source?, 0000

3R3K/4n3/4NPk1/5RPp/3P3p/7P/B2P2Q1/8

#2

11 + 4

4774 Canadian Chess Problems 1890

SOLUTION

  • SOUND
  • Sets
    • 1...Sxf5
      • 2.Sf4#
      • 2.Sf8#
  • Tries
    • 1.Rg8+?
      • 1...Kxf5
        • 2.Qf3#
      • 1...Kf7
        • 2.Sd8#
      • 1...Sxg8!
  • Keys
    • 1.Qb7!
      • 1...Kxf5
        • 2.Qb1#
      • 1...Kf7
        • 2.Sf4#
        • 2.Sf8#
      • 1...Sxf5
        • 2.Qh7#
      • 1...Sd5
        • 2.Qh7#
      • 1...Sc6
        • 2.Qh7#
      • 1...Sc8
        • 2.Qh7#
      • 1...Sg8
        • 2.Qh7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(J);CHECK
      • Vars
        • K(c);S_FLIGHT,XR(F)::QAR2(C)
        • K(c);S_FLIGHT::B(A)+S(H),DCHECK
      • Refutation
        • S(d);XR(J)
  • Actual
    • Q(C);
    • Vars
      • K(c);OGATEB,S_FLIGHT,XR(F)::QAB(C)
      • S(d);OGATE,SBLOCK,XR(F)::QAB1(C)
      • S(d);OGATE::QAB1(C)
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