MESON Chess Problem Database

Problem Display
PID: 226341 (8/8/q3bn2/Nr6/3kBBpN/3p4/6Q1/2R3K1 w - - 0 1)

Lincoln, Robert A

The Problemist Supplement, 1997

8/8/q3bn2/Nr6/3kBBpN/3p4/6Q1/2R3K1

#2

7 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qc6
      • 2.Sxc6#
    • 1...Qa7
      • 2.Sc6#
    • 1...Rd5
      • 2.Sb3#
    • 1...Bc4
      • 2.Rxc4#
    • 1...Bd5
      • 2.Sf5#
    • 1...Bf5
      • 2.Rc4#
    • 1...Bd7
      • 2.Rc4#
    • 1...Bc8
      • 2.Rc4#
    • 1...Sd5
      • 2.Rc4#
  • Tries
    • 1.Sf5+?
      • 1...Bxf5
        • 2.Rc4#
      • 1...Rxf5!
  • Keys
    • 1.Bc6!
      • threat
        • 2.Qf2#
      • 1...Qxc6
        • 2.Sxc6#
      • 1...d2
        • 2.Qxd2#
      • 1...Rb2
        • 2.Qxb2#
      • 1...Rd5
        • 2.Sb3#
      • 1...Re5
        • 2.Qb2#
      • 1...Bd5
        • 2.Sf5#
      • 1...Se4
        • 2.Qxe4#
      • 1...Sd5
        • 2.Rc4#
      • 1...g3
        • 2.Sf3#

This is after 17617

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 5
  • Sets
    • Q(e);N_GUARD::S(G),XQ(e)
    • Q(e);N_GUARD::S(G)
    • R(d);N_GUARD,S_CUTB(f)::S(G)
    • B(f);N_GUARD::R1(A),XB(f)
    • B(f);N_GUARD,S_CUTR(d)::S(F)
    • B(f);N_GUARD::R1(A)
    • S(g);S_CUTB(f)::R1(A)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • B(f);XS(F)::R1(A)
      • Refutation
        • R(d);XS(F)
  • Actual
    • B(D);
    • Threat
      • QAB(C)
    • Vars
      • Q(e);XB(D)::S(G),XQ(e)
      • P(a);OGATEB::QAR2(C),XP(a)
      • R(d);N_GUARD::QAB(C),XR(d)
      • R(d);N_GUARD,S_CUTB(f)::S(G)
      • R(d);N_GUARD::QAB(C)
      • B(f);N_GUARD,S_CUTR(d)::S(F)
      • S(g);N_GUARD::QAR1(C),XS(g)
      • S(g);S_CUTB(f)::R1(A)
      • P(c);N_GUARD::S(F)
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