MESON Chess Problem Database

Problem Display
PID: 849 (8/6p1/6N1/R4R1N/6k1/6B1/K4PB1/2b3n1 w - - 0 1)

Sydenham, Colin Peter

Comm., British Chess Magazine, 1975

8/6p1/6N1/R4R1N/6k1/6B1/K4PB1/2b3n1

#2

8 + 4

15513 Selected Chess Problems of Colin Sydenham 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Bb2
      • 2.Rf4#
      • 2.Rg5#
    • 1...Ba3
      • 2.Rf4#
      • 2.Rg5#
    • 1...Bf4
      • 2.Rxf4#
    • 1...Bg5
      • 2.Rxg5#
    • 1...Se2
      • 2.f3#
    • 1...Sh3
      • 2.Bf3#
      • 2.f3#
  • Tries
    • 1.Shf4?
      • threat
        • 2.Rg5#
      • 1...Bxf4
        • 2.Rxf4#
      • 1...Sf3
        • 2.Bh3#
      • 1...Sh3!
    • 1.Sxg7?
      • threat
        • 2.Se5#
      • 1...Bb2
        • 2.Rf4#
        • 2.Rg5#
      • 1...Bf4
        • 2.Rxf4#
      • 1...Sf3!
    • 1.Bh3+?
      • 1...Sxh3
        • 2.f3#
      • 1...Kxh3!
    • 1.Bf4?
      • threat
        • 2.Rg5#
      • 1...Bxf4
        • 2.Rxf4#
      • 1...Sh3
        • 2.f3#
      • 1...Sf3!
    • 1.Ra4+?
      • 1...Bf4
        • 2.Raxf4#
      • 1...Kxf5!
  • Keys
    • 1.Sgf4!
      • threat
        • 2.Rg5#
      • 1...Bxf4
        • 2.Rxf4#
      • 1...Sf3
        • 2.Bh3#
      • 1...Sh3
        • 2.f3#
      • 1...g5
        • 2.Sf6#
        • 2.Rxg5#

FEATURES

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