MESON Chess Problem Database

Problem Display
PID: 55070 (7R/7B/b3N2k/2r5/1rp5/7p/4K3/b2Q4 w - - 0 1)

Lewis, Robert Tony

The Problemist Supplement, 2004

7R/7B/b3N2k/2r5/1rp5/7p/4K3/b2Q4

#2

5 + 7

5454 Near Snap 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Rb2+
      • 2.Bc2#
    • 1...Re5+
      • 2.Be4#
    • 1...c3+
      • 2.Bd3#
  • Tries
    • 1.Qc1+?
      • 1...Rg5
        • 2.Qxg5#
      • 1...Kh5!
    • 1.Qd2+?
      • 1...Rg5
        • 2.Qxg5#
      • 1...Kh5!
  • Keys
    • 1.Qg1!
      • threat
        • 2.Qg6#
      • 1...Rb2+
        • 2.Bc2#
      • 1...Re5+
        • 2.Be4#
      • 1...c3+
        • 2.Bd3#
      • 1...Kh5
        • 2.Bg6#
      • 1...Rg5
        • 2.Qxg5#

This anticipates 55071(2004)

This is after 9498

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(c);CHECK,S_CUTB(a)::R(E)+B(D)
    • R(e);CHECK,S_CUTB(a)::R(E)+B(D)
    • P(d);CHECK,S_CUTB(a)::R(E)+B(D)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • R(e);N_GUARD,P_SPINR(e)::QAB1(A),XR(e)
      • Refutation
        • K(g);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • R(e);N_GUARD,P_SPINR(e)::QAB1(A),XR(e)
      • Refutation
        • K(g);P-FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • R(c);CHECK,S_CUTB(a)::R(E)+B(D)
      • R(e);CHECK,S_CUTB(a)::R(E)+B(D)
      • P(d);CHECK,S_CUTB(a)::R(E)+B(D)
      • K(g);P-FLIGHT::R(E)+B(D),DCHECK
      • R(e);N_GUARD::QAB1(A),XR(e)
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