MESON Chess Problem Database

Problem Display
PID: 6801 (5B2/b2B2p1/6b1/2pk3r/3nR1N1/1P2KP2/8/3R2n1 w - - 0 1)

Lyness, Robert Cranston

Social Chess Quarterly (The), 1933

5B2/b2B2p1/6b1/2pk3r/3nR1N1/1P2KP2/8/3R2n1

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rh1
      • 2.Re5#
    • 1...Rh2
      • 2.Re5#
    • 1...Rh3
      • 2.Re5#
    • 1...Rh4
      • 2.Re5#
    • 1...Re5
      • 2.Rxe5#
    • 1...Rh6
      • 2.Re5#
    • 1...Rh7
      • 2.Re5#
    • 1...Rh8
      • 2.Re5#
    • 1...Bxe4
      • 2.fxe4#
    • 1...Bf5
      • 2.Re5#
  • Keys
    • 1.Kd3!
      • threat
        • 2.Se3#
      • 1...Bxe4+
        • 2.fxe4#
      • 1...c4+
        • 2.bxc4#
      • 1...Sc2
        • 2.Kxc2#
      • 1...Sf5
        • 2.Re5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 9
  • Sets
    • R(e);N_GUARD::R1(E)
    • R(e);N_GUARD,P_PINP(D)::R1(E)
    • R(e);N_GUARD,P_PINR(E)::R1(E),XR(e)
    • B(f);OGATE,XR(E)::P(D),XB(f)
    • B(f);S_CUTR(e)::R1(E)
  • Actual
    • K(C);N_PINS(b),P-FLIGHT,P_SPINR(E)
    • Threat
      • S(F)
    • Vars
      • B(f);CHECK,OGATE,XR(E)::P(D),XB(f)
      • P(c);CHECK,OGATE::P(B),XP(c)
      • S(b);::R(A)+K(C),XS(b)
      • S(b);N_PINR(E)::R1(E)
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