MESON Chess Problem Database

Problem Display
PID: 272203 (2R5/8/n1Pk2N1/5P2/4b3/3n1pK1/5B2/2QR4 w - - 0 1)

Morse, Christopher Jeremy

The Observer, 1960

(First published on Sun Oct 23 1960)

2R5/8/n1Pk2N1/5P2/4b3/3n1pK1/5B2/2QR4

#2

8 + 5

17397 Ling Notebooks 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Rd8#
    • 1...Bxc6
      • 2.Qxc6#
    • 1...Sb4
      • 2.Qc5#
    • 1...Sc5
      • 2.Qxc5#
    • 1...Sc7
      • 2.Rd8#
      • 2.Qc5#
    • 1...Sb8
      • 2.Qc5#
  • Tries
    • 1.Bb6?
      • threat
        • 2.Rd8#
      • 1...Kd5
        • 2.Rd8#
      • 1...Bxc6
        • 2.Qxc6#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Sb8
        • 2.Qc5#
      • 1...Bxf5!
    • 1.Rxd3+?
      • 1...Bd5
        • 2.Qf4#
      • 1...Bxd3!
    • 1.Qc3?
      • threat
        • 2.Qe5#
      • 1...Kd5
        • 2.Rd8#
        • 2.Qd4#
      • 1...Bxc6
        • 2.Qxc6#
      • 1...Sc7
        • 2.Rd8#
        • 2.Qc5#
      • 1...Bd5!
  • Keys
    • 1.Qe3!
      • 1...Kd5
        • 2.Qd4#
      • 1...Bxf5
        • 2.Qe5#
      • 1...Bxc6
        • 2.Qe6#
      • 1...Sc7
        • 2.Qc5#
      • 1...Bd5
        • 2.Qe7#
      • 1...Sb4
        • 2.Qc5#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Sb8
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(e);N_GUARD,P-FLIGHT::R(H)
    • B(c);OGATE,XP(F)::QAR1(A),XB(c)
    • S(d);N_GUARD::QAB1(A)
    • S(d);N_GUARD::QAB1(A),XS(d)
  • Tries
    • Try
      • B(C);
      • Threat
        • R(H)
      • Vars
        • K(e);P-FLIGHT::R(H)
        • B(c);OGATE,XP(F)::QAR1(A),XB(c)
        • S(d);N_GUARD::QAB1(A),XS(d)
        • S(d);N_GUARD::QAB1(A)
      • Refutation
        • B(c);XP(E)
    • Try
      • R(B);CHECK,XS(a)
      • Vars
        • B(c);P_SPINB(c)::QAB(A)
      • Refutation
        • B(c);XR(B)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • B(c);OGATE,XP(F)::QAR1(A),XB(c)
      • Refutation
        • B(c);N_SPINS(a)
  • Actual
    • Q(A);
    • Vars
      • K(e);P-FLIGHT,S_CUTB(c)::QAR1(A)
      • B(c);OGATE,XP(E)::QAB1(A)
      • B(c);OGATE,XP(F)::QAR1(A)
      • S(d);N_GUARD::QAB1(A)
      • B(c);N_SPINS(a),OGATE,SBLOCK::QAB1(A)
      • S(d);N_GUARD::QAB1(A),XS(d)
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