MESON Chess Problem Database

Problem Display
PID: 136979 (KB6/8/1p4R1/2p5/2n1kp2/2b4Q/B1N4N/6Rb w - - 0 1)

Lytton, Cedric C (was Sells, CCL)

Reeves, Alfred Christopher

Comm., The Problemist Supplement, 2010

KB6/8/1p4R1/2p5/2n1kp2/2b4Q/B1N4N/6Rb

#2

8 + 7

56 The Problemist 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Qe6#
    • 1...Sd2
      • 2.Re1#
  • Tries
    • 1.Bxc4?
      • threat
        • 2.Qd3#
      • 1...f3
        • 2.Qg4#
      • 1...Bf3!
    • 1.Qf3+?
      • 1...Kf5
        • 2.R1g5#
      • 1...Bxf3!
  • Keys
    • 1.Qh7!
      • threat
        • 2.R6g5#
      • 1...Kd3+
        • 2.R6g2#
      • 1...Kf5+
        • 2.Rc6#
      • 1...Kd5
        • 2.Qb7#
      • 1...Be5
        • 2.Rd6#
      • 1...Se3
        • 2.Re6#
      • 1...Se5
        • 2.Re6#
      • 1...Sd6
        • 2.Re6#

This is after 5011

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • K(d);P_SPINS(c),S_FLIGHT::QAB1(E)
    • S(c);N_GUARD,S_CUTB(b)::R(A)
  • Tries
    • Try
      • B(B);XS(c)
      • Threat
        • QAB1(E)
      • Vars
        • P(e);OGATEB::QAR2(E)
      • Refutation
        • B(a);
    • Try
      • Q(E);CHECK
      • Vars
        • K(d);P_PINQ(E),P_SPINP(e),S_FLIGHT::R1(A)
      • Refutation
        • B(a);XQ(E)
  • Actual
    • Q(E);
    • Threat
      • QAB(E)+R(F)
    • Vars
      • K(d);CHECK,S_FLIGHT::QAB(E)+R(F)
      • K(d);P_SPINS(c),S_FLIGHT::QAB(E)
      • B(b);SBLOCK::QAB(E)+R(F)
      • S(c);::QAB(E)+R(F),DCHECK
      • S(c);::QAB(E)+R(F)
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