MESON Chess Problem Database

Problem Display
PID: 16323 (1Rn1n2B/2p1p3/2N4p/1Pk4r/r3P2p/Pp5K/b2R1N1Q/5B2 w - - 0 1)

Clark, Cecil Henry Douglas

Chess, 1940

1Rn1n2B/2p1p3/2N4p/1Pk4r/r3P2p/Pp5K/b2R1N1Q/5B2

#2

11 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa3
      • 2.Bd4#
    • 1...Rb4
      • 2.axb4#
    • 1...Rc4
      • 2.Sd3#
    • 1...Rd4
      • 2.Bxd4#
    • 1...Rxe4
      • 2.Sxe4#
    • 1...Ra5
      • 2.Bd4#
    • 1...Ra6
      • 2.Bd4#
    • 1...Ra7
      • 2.Bd4#
    • 1...Ra8
      • 2.Bd4#
    • 1...Rd5
      • 2.Rxd5#
    • 1...Re5
      • 2.Qxe5#
    • 1...e5
      • 2.Rd5#
  • Tries
    • 1.Rc2+?
      • 1...Rc4
        • 2.Sd3#
        • 2.Bd4#
        • 2.Rxc4#
      • 1...bxc2!
  • Keys
    • 1.Sa5!
      • threat
        • 2.Sd3#
      • 1...Rxe4
        • 2.Sxe4#
      • 1...Rxa5
        • 2.Bd4#
      • 1...Rd4
        • 2.Bxd4#
      • 1...Rd5
        • 2.Rxd5#
      • 1...Re5
        • 2.Qxe5#
      • 1...Bb1
        • 2.Sxb3#
      • 1...Sb6
        • 2.Sb7#
      • 1...Sf6
        • 2.Qxc7#
      • 1...Sg7
        • 2.Qxc7#
      • 1...e5
        • 2.Rd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • R(c);N_GUARD,XP(E)::B(K)
    • R(c);OGATE::P(E),XR(c)
    • R(c);SBLOCK::S(C)
    • R(c);N_GUARD::B(K),XR(c)
    • R(c);XP(G)::S(C),XR(c)
    • R(c);N_GUARD::B(K)
    • R(f);N_GUARD::R1(B),XR(f)
    • R(f);N_GUARD::QAR2(D),XR(f)
    • P(i);S_CUTR(f)::R1(B)
  • Tries
    • Try
      • R(B);CHECK
      • Refutation
        • P(b);XR(B)
  • Actual
    • S(I);
    • Threat
      • S(C)
    • Vars
      • R(c);XP(G)::S(C),XR(c)
      • R(c);N_GUARD,XS(I)::B(K)
      • R(c);N_GUARD::B(K),XR(c)
      • R(f);N_GUARD::R1(B),XR(f)
      • R(f);N_GUARD::QAR2(D),XR(f)
      • B(a);N_GUARD::S(I),XP(b)
      • S(j);SBLOCK::S(I)
      • S(k);N_GUARD::QAR2(D),XP(h)
      • P(i);S_CUTR(f)::R1(B)
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