MESON Chess Problem Database

Problem Display
PID: 44624 (b2B3n/8/4kNB1/3RN1n1/2P5/8/2R5/7K w - - 0 1)

Greenwood, William M

British Chess Bulletin, 1911

b2B3n/8/4kNB1/3RN1n1/2P5/8/2R5/7K

#2

8 + 4

SOLUTION

  • SOUND
  • Tries
    • 1.Sh5?
      • threat
        • 2.Sf4#
        • 2.Sg7#
      • 1...Sxg6
        • 2.Sg7#
      • 1...Sh3
        • 2.Sg7#
      • 1...Bxd5+!
    • 1.Se8?
      • threat
        • 2.Sc7#
        • 2.Sg7#
      • 1...Sxg6
        • 2.Sg7#
      • 1...Bxd5+!
  • Keys
    • 1.Sf7!
      • threat
        • 2.Sxg5#
      • 1...Bxd5+
        • 2.cxd5#
      • 1...Sgxf7
        • 2.Bf5#
      • 1...Shxf7
        • 2.Bf5#
      • 1...Sf3
        • 2.Rd6#
      • 1...Sh3
        • 2.Re2#
      • 1...Se4
        • 2.Re5#
      • 1...Sh7
        • 2.Re2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(F);
      • Threat
        • DUALS(2)
      • Vars
        • S(d);XB(G)::S(F)
        • S(a);::S(F)
      • Refutation
        • B(c);CHECK,XR(D)
    • Try
      • S(F);
      • Threat
        • DUALS(2)
      • Vars
        • S(d);XB(G)::S(F)
      • Refutation
        • B(c);CHECK,XR(D)
  • Actual
    • S(E);
    • Threat
      • S(E),XS(a)
    • Vars
      • B(c);CHECK,OGATE,XR(D)::P(C),XB(c)
      • S(a);SBLOCK,XS(E)::B(G)
      • S(d);SBLOCK,XS(E)::B(G)
      • S(a);N_PINR(D)::R1(D)
      • S(a);N_GUARD::R(B)
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