MESON Chess Problem Database

Problem Display
PID: 153996 (8/R5nr/2Pk4/2R4p/6b1/BB2Nrb1/2PP2pq/1KQ1n3 w - - 0 1)

Shire, David J

The Problemist Supplement, 2014

8/R5nr/2Pk4/2R4p/6b1/BB2Nrb1/2PP2pq/1KQ1n3

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rf5
      • 2.Rd7#
    • 1...Be5
      • 2.Rc3#
    • 1...Bd7
      • 2.Rxd7#
    • 1...Se6
      • 2.Sc4#
  • Tries
    • 1.Rd5+?
      • 1...Ke6
        • 2.Rf5#
      • 1...Kxc6!
    • 1.d4?
      • threat
        • 2.Rc3#
      • 1...Sxc2
        • 2.Rxc2#
      • 1...Rf5
        • 2.Rd7#
      • 1...Se6
        • 2.Sc4#
      • 1...Sd3!
  • Keys
    • 1.Qb2!
      • threat
        • 2.Qd4#
      • 1...Sxc2
        • 2.Rxc2#
      • 1...Bd7
        • 2.Rxd7#
      • 1...Rf4
        • 2.Qe5#
      • 1...Rf5
        • 2.Rd7#
      • 1...Be5
        • 2.Rc3#
      • 1...Be6
        • 2.Rc4#
      • 1...Sf5
        • 2.Qf6#
      • 1...Se6
        • 2.Sc4#

This is a version of 24678

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(d);S_CUTB(f)::R1(J)
    • B(e);SBLOCK::B(E)+R(H)
    • B(f);N_GUARD::R1(J),XB(f)
    • S(i);SBLOCK::S(G)
  • Tries
    • Try
      • R(H);CHECK
      • Vars
        • K(h);P-FLIGHT::B(F)+R(H)
      • Refutation
        • K(h);P-FLIGHT,XP(I)
    • Try
      • P(D);
      • Threat
        • B(E)+R(H)
      • Vars
        • S(a);OGATE,XP(C)::B(E)+R(H),XS(a)
        • R(d);S_CUTB(f)::R1(J)
        • S(i);SBLOCK::S(G)
      • Refutation
        • S(a);
  • Actual
    • Q(B);
    • Threat
      • QAR2(B)
    • Vars
      • S(a);OGATE,XP(C)::B(E)+R(H),XS(a)
      • B(f);N_GUARD::R1(J),XB(f)
      • R(d);S_CUTB(e)::QAB1(B)
      • R(d);S_CUTB(f)::R1(J)
      • B(e);SBLOCK::B(E)+R(H)
      • B(f);SBLOCK::B(E)+R(H)
      • S(i);N_GUARD,S_CUTB(f),S_CUTR(d)::QAR2(B)
      • S(i);SBLOCK::S(G)
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