MESON Chess Problem Database

Problem Display
PID: 267127 (8/8/8/4Q1B1/8/1Bn5/1nK5/k7 w - - 0 1)

Sumner, Christopher Richard Benson

The Problemist, 1955

8/8/8/4Q1B1/8/1Bn5/1nK5/k7

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Sb1
      • 2.Qxb2#
    • 1...Sa2
      • 2.Qxb2#
    • 1...Se2
      • 2.Qxb2#
    • 1...Se4
      • 2.Qxb2#
    • 1...Sb5
      • 2.Qxb2#
    • 1...Sd5
      • 2.Qxb2#
  • Keys
    • 1.Bf6!
      • 1...Sbd1
        • 2.Qa5#
      • 1...Sd3
        • 2.Qa5#
      • 1...Sba4
        • 2.Qe1#
      • 1...Sc4
        • 2.Qe1#
      • 1...Sb1
        • 2.Qxb2#
      • 1...Scd1
        • 2.Qa5#
      • 1...Sa2
        • 2.Qxb2#
      • 1...Se2
        • 2.Qxb2#
        • 2.Qa5#
      • 1...Sca4
        • 2.Qe1#
      • 1...Se4
        • 2.Qxb2#
        • 2.Qa5#
      • 1...Sb5
        • 2.Qxb2#
        • 2.Qe1#
      • 1...Sd5
        • 2.Qxb2#
        • 2.Qe1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 4
  • Sets
    • S(c);OGATE,P_SPINS(b)::QAB1(C),XS(b)
  • Actual
    • B(D);
    • Vars
      • S(b);N_GUARD,P_SPINS(c)::QAR(C)
      • S(c);OGATE,P_SPINS(b)::QAB1(C),XS(b)
      • S(c);N_GUARD,P_SPINS(b)::QAR(C)
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