MESON Chess Problem Database

Problem Display
PID: 152230 (2rn4/p2N4/3R1p2/6RK/P1k2p2/r3P3/p7/b2BB3 w - - 0 1)

McAllister, George W

Good Companions (May), 1914

2rn4/p2N4/3R1p2/6RK/P1k2p2/r3P3/p7/b2BB3

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rc3
      • 2.Rd4#
    • 1...Rc5
      • 2.Rxc5#
    • 1...Ra8
      • 2.Rc5#
    • 1...Rb8
      • 2.Rc5#
    • 1...Bd4
      • 2.Rxd4#
    • 1...Sc6
      • 2.Rc5#
    • 1...a5
      • 2.Sb6#
    • 1...a6
      • 2.Sb6#
  • Keys
    • 1.Rb5!
      • threat
        • 2.Rb4#
      • 1...Rc5+
        • 2.Rxc5#
      • 1...Rxa4
        • 2.Be2#
      • 1...Bd4
        • 2.Rxd4#
      • 1...Rb3
        • 2.Bxb3#
      • 1...Rc3
        • 2.Rd4#
      • 1...Rb8
        • 2.Rc5#
      • 1...Bc3
        • 2.Be2#
      • 1...Sc6
        • 2.Rc5#
      • 1...a5
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • R(c);S_CUTB(a)::R1(G)
    • R(h);N_GUARD,P_PINR(E)::R1(E),XR(h)
    • R(h);N_GUARD::R1(E)
    • B(a);N_GUARD::R1(G),XB(a)
    • S(i);S_CUTR(h)::R1(E)
    • P(g);N_GUARD::S(H)
  • Actual
    • R(E);
    • Threat
      • R1(E)
    • Vars
      • R(h);CHECK,N_GUARD::R1(E),XR(h)
      • R(c);N_GUARD,XP(D)::B(A)
      • B(a);N_GUARD::R1(G),XB(a)
      • R(c);N_GUARD::B(A),XR(c)
      • R(c);S_CUTB(a)::R1(G)
      • R(h);N_GUARD::R1(E)
      • B(a);S_CUTR(c)::B(A)
      • S(i);S_CUTR(h)::R1(E)
      • P(g);N_GUARD::S(H)
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