MESON Chess Problem Database

Problem Display
PID: 55071 (7R/7B/b2QN2k/2r5/1rp5/7P/4K3/b7 w - - 0 1)

Lewis, Robert Tony

The Problemist Supplement, 2004

7R/7B/b2QN2k/2r5/1rp5/7P/4K3/b7

#2

6 + 6

5454 Near Snap 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Rb2+
      • 2.Bc2#
    • 1...Re5+
      • 2.Be4#
    • 1...c3+
      • 2.Bd3#
  • Tries
    • 1.Sf4+?
      • 1...Kg7
        • 2.Qf8#
      • 1...Bf6
        • 2.Qxf6#
      • 1...Kg5!
    • 1.Sg7+?
      • 1...Kxg7
        • 2.Qf8#
      • 1...Bf6
        • 2.Qxf6#
      • 1...Kg5!
    • 1.Qf4+?
      • 1...Rg5
        • 2.Qxg5#
      • 1...Kh5!
    • 1.Qf8+?
      • 1...Bg7
        • 2.Bb1#
        • 2.Bc2#
        • 2.Bd3#
        • 2.Be4#
        • 2.Bf5#
      • 1...Kh5!
    • 1.Qd2+?
      • 1...Rg5
        • 2.Qxg5#
      • 1...Kh5!
  • Keys
    • 1.Qg3!
      • threat
        • 2.Qg6#
      • 1...Rb2+
        • 2.Bc2#
      • 1...Re5+
        • 2.Be4#
      • 1...c3+
        • 2.Bd3#
      • 1...Kh5
        • 2.Bg6#
      • 1...Rg5
        • 2.Qxg5#

Anticipated by 55070(2004)

This is after 9498

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(b);CHECK,S_CUTB(a)::R(F)+B(E)
    • R(d);CHECK,S_CUTB(a)::R(F)+B(E)
    • P(c);CHECK,S_CUTB(a)::R(F)+B(E)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(f);S_FLIGHT::QAB1(C)
        • B(a);N_GUARD,P_SPINB(a)::QAR2(C),XB(a)
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • S(D);CHECK
      • Vars
        • K(f);OGATEB,S_FLIGHT,XS(D)::QAB1(C)
        • B(a);N_GUARD,P_SPINB(a)::QAR2(C),XB(a)
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • R(d);N_GUARD,P_SPINR(d)::QAB1(C),XR(d)
      • Refutation
        • K(f);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Refutation
        • K(f);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • R(d);N_GUARD,P_SPINR(d)::QAB1(C),XR(d)
      • Refutation
        • K(f);P-FLIGHT
  • Actual
    • Q(C);
    • Threat
      • QAR1(C)
    • Vars
      • R(b);CHECK,S_CUTB(a)::R(F)+B(E)
      • R(d);CHECK,S_CUTB(a)::R(F)+B(E)
      • P(c);CHECK,S_CUTB(a)::R(F)+B(E)
      • K(f);P-FLIGHT::R(F)+B(E),DCHECK
      • R(d);N_GUARD::QAB1(C),XR(d)
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