MESON Chess Problem Database

Problem Display
PID: 247463 (r7/bpQ5/5p2/N2k1P2/1r6/1pB2K2/1P4N1/8 w - - 0 1)

Ellison, Wallace D

British Chess Magazine, 1931

r7/bpQ5/5p2/N2k1P2/1r6/1pB2K2/1P4N1/8

#2

7 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Se3#
    • 1...Rf4+
      • 2.Sxf4#
    • 1...Rb5
      • 2.Sf4#
    • 1...Rb6
      • 2.Se3#
      • 2.Sf4#
    • 1...Be3
      • 2.Sxe3#
    • 1...Bd4
      • 2.Sf4#
    • 1...Bb8
      • 2.Se3#
    • 1...b5
      • 2.Qc6#
    • 1...b6
      • 2.Se3#
      • 2.Qc6#
  • Tries
    • 1.Bxb4?
      • threat
        • 2.Qd6#
      • 1...Kd4
        • 2.Qd6#
      • 1...Bc5
        • 2.Qxc5#
      • 1...Bb8
        • 2.Qc5#
      • 1...Rd8!
  • Keys
    • 1.Bd4!
      • threat
        • 2.Qd7#
      • 1...Kxd4
        • 2.Qd6#
      • 1...Rxd4
        • 2.Se3#
      • 1...Bxd4
        • 2.Sf4#
      • 1...Rb6
        • 2.Qc5#
      • 1...Rd8
        • 2.Qxd8#
      • 1...Bc5
        • 2.Qxc5#
      • 1...Bb8
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • R(b);S_CUTB(e)::S(B)
    • R(b);CHECK,N_GUARD::S(B),XR(b)
    • R(b);N_GUARD::S(B)
    • B(e);N_GUARD::S(B),XB(e)
    • B(e);S_CUTR(b)::S(B)
    • B(e);N_GUARD::S(B)
    • P(f);N_GUARD::QAB1(G)
  • Tries
    • Try
      • B(C);XR(b)
      • Threat
        • QAR1(G)
      • Vars
        • K(c);P-FLIGHT::QAR2(G)
        • B(e);N_GUARD::QAR1(G),XB(e)
        • B(e);N_GUARD::QAR1(G)
      • Refutation
        • R(g);
  • Actual
    • B(C);
    • Threat
      • QAR2(G)
    • Vars
      • K(c);P-FLIGHT,XB(C)::QAR2(G)
      • R(b);SBLOCK,XB(C)::S(B)
      • B(e);SBLOCK,XB(C)::S(B)
      • R(b);S_CUTB(e)::QAR1(G)
      • R(g);N_GUARD::QAR(G),XR(g)
      • B(e);N_GUARD::QAR1(G),XB(e)
      • B(e);N_GUARD::QAR1(G)
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