MESON Chess Problem Database

Problem Display
PID: 134389 (2R5/3R4/1N2p3/3p4/3pP3/5p2/3k4/1KNb2Q1 w - - 0 1)

Sheppard, Charles William

La Strategie, 1920

2R5/3R4/1N2p3/3p4/3pP3/5p2/3k4/1KNb2Q1

#2

7 + 6

136 Problem Observer 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bc2+
      • 2.Rxc2#
    • 1...Be2
      • 2.Rc2#
    • 1...dxe4
      • 2.Rxd4#
  • Tries
    • 1.Sc4+?
      • 1...Kc3
        • 2.Qe1#
      • 1...dxc4!
  • Keys
    • 1.Rc3!
      • threat
        • 2.Rd3#
      • 1...Bc2+
        • 2.Rxc2#
      • 1...Kxc3
        • 2.Qe1#
      • 1...dxc3
        • 2.Sc4#
      • 1...dxe4
        • 2.Qe3#
      • 1...Be2
        • 2.Rc2#
      • 1...d3
        • 2.Rxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(a);CHECK,N_GUARD::R1(G),XB(a)
    • B(a);N_GUARD::R1(G)
    • P(e);OGATE,P_SPINP(d),XP(D)::R(F),XP(d)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB(C)
      • Refutation
        • P(e);P_SPINP(d),XS(E)
  • Actual
    • R(G);
    • Threat
      • R1(G)
    • Vars
      • B(a);CHECK,N_GUARD::R1(G),XB(a)
      • K(b);S_FLIGHT,XR(G)::QAB(C)
      • P(d);P_SPINP(e),SBLOCK,XR(G)::S(E)
      • P(e);P_SPINP(d),XP(D)::QAB1(C)
      • B(a);N_GUARD::R1(G)
      • P(d);::R1(G),XP(d)
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