MESON Chess Problem Database

Problem Display
PID: 77129 (4Q3/2k5/K7/1n6/N1p5/nN6/3B4/2R5 w - - 0 1)

Davey, David Murray

The Tablet, 1949

(First published on Sat Feb 5 1949)

4Q3/2k5/K7/1n6/N1p5/nN6/3B4/2R5

#2

6 + 4

15239 Valois Notebooks 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Sc3
      • 2.Bf4#
    • 1...Sd4
      • 2.Bf4#
    • 1...Sd6
      • 2.Ba5#
    • 1...Sa7
      • 2.Bf4#
  • Tries
    • 1.Rd1?
      • threat
        • 2.Ba5#
      • 1...Kd6
        • 2.Bf4#
      • 1...Sc3
        • 2.Bf4#
      • 1...Sd4
        • 2.Bf4#
      • 1...c3!
    • 1.Qc6+?
      • 1...Kb8
        • 2.Qb7#
      • 1...Kd8
        • 2.Bg5#
      • 1...Kxc6!
    • 1.Qd7+?
      • 1...Kb8
        • 2.Qb7#
        • 2.Qd8#
      • 1...Kxd7!
    • 1.Qd8+?
      • 1...Kc6
        • 2.Sa5#
      • 1...Kxd8!
  • Keys
    • 1.Sc3!
      • 1...Kd6
        • 2.Bf4#
      • 1...Sxc3
        • 2.Bf4#
      • 1...cxb3
        • 2.Sxb5#
      • 1...Sb1
        • 2.Sxb5#
      • 1...Sc2
        • 2.Sxb5#
      • 1...Sd4
        • 2.Bf4#
      • 1...Sd6
        • 2.Sd5#
      • 1...Sa7
        • 2.Bf4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(c);N_GUARD,N_SPINP(b)::B(B)
    • S(c);N_GUARD::B(B)
    • S(c);SBLOCK::B(B)
  • Tries
    • Try
      • R(A);N_PINP(b)
      • Threat
        • B(B)
      • Vars
        • K(d);S_FLIGHT::R(A)+B(B),DCHECK
        • S(c);N_GUARD::B(B)
      • Refutation
        • P(b);
    • Try
      • Q(F);CHECK,N_PINP(b)
      • Vars
        • K(d);S_FLIGHT::QAR1(F)
        • K(d);S_FLIGHT::B(B)
      • Refutation
        • K(d);P-FLIGHT,P_SPINP(b),XQ(F)
    • Try
      • Q(F);CHECK
      • Refutation
        • K(d);N_SPINP(b),P-FLIGHT,XQ(F)
    • Try
      • Q(F);CHECK
      • Vars
        • K(d);P-FLIGHT::S(C)
      • Refutation
        • K(d);N_SPINP(b),S_FLIGHT,XQ(F)
  • Actual
    • S(D);N_PINP(b)
    • Vars
      • K(d);S_FLIGHT::B(B)
      • S(c);N_GUARD,XS(D)::B(B)
      • P(b);XS(C)::R(A)+S(D),DCHECK,XS(c)
      • S(a);N_GUARD::S(D),XS(c)
      • S(c);N_GUARD::B(B)
      • S(c);SBLOCK::S(D)
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