MESON Chess Problem Database

Problem Display
PID: 2705 (1QN5/5n2/r1P1B3/2k5/3ppR2/2p5/2N1P3/4B1K1 w - - 0 1)

Stubbs, Charles Francis

Source?, 0000

1QN5/5n2/r1P1B3/2k5/3ppR2/2p5/2N1P3/4B1K1

#2

9 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Qb6#
    • 1...Ra2
      • 2.Qb6#
    • 1...Ra3
      • 2.Qb6#
    • 1...Ra4
      • 2.Qb6#
    • 1...Ra5
      • 2.Qb6#
    • 1...Rb6
      • 2.Qxb6#
    • 1...Rxc6
      • 2.Qb4#
    • 1...Ra7
      • 2.Qb6#
    • 1...Ra8
      • 2.Qb6#
  • Tries
    • 1.Rf5+?
      • 1...Kxc6
        • 2.Sb4#
        • 2.Sxd4#
        • 2.Se7#
      • 1...Se5!
    • 1.Qb3?
      • threat
        • 2.Qc4#
        • 2.Qd5#
      • 1...Se5
        • 2.Qd5#
      • 1...Ra4
        • 2.Qd5#
        • 2.Qb6#
      • 1...Sd6
        • 2.Qd5#
      • 1...Kxc6!
  • Keys
    • 1.Sxd4!
      • 1...Kxd4
        • 2.Bf2#
      • 1...Rxc6
        • 2.Sb3#
      • 1...Rb6
        • 2.Qxb6#
      • 1...Se5
        • 2.Qd6#
      • 1...Ra1
        • 2.Qb6#
      • 1...Ra2
        • 2.Qb6#
      • 1...Ra3
        • 2.Qb6#
      • 1...Ra4
        • 2.Qb6#
      • 1...Ra5
        • 2.Qb6#
      • 1...Ra7
        • 2.Qb6#
      • 1...Ra8
        • 2.Qb6#
      • 1...Sg5
        • 2.Qd6#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Sh6
        • 2.Qd6#
      • 1...Sd8
        • 2.Qd6#
      • 1...Sh8
        • 2.Qd6#
      • 1...c2
        • 2.Qb4#
      • 1...e3
        • 2.Qb5#

This is a version of 97291

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • R(e);N_GUARD,P_PINB(A)::QAB1(H)
    • R(e);N_GUARD::QAB1(H)
    • R(e);N_GUARD::QAB1(H),XR(e)
    • R(e);SBLOCK,XP(F)::QAB1(H)
  • Tries
    • Try
      • R(E);CHECK
      • Refutation
        • S(f);P_SPINS(f)
    • Try
      • Q(H);
      • Threat
        • DUALS(2)
      • Vars
        • S(f);::QAR1(H)
      • Refutation
        • K(d);P-FLIGHT,XP(F)
  • Actual
    • S(C);XP(b)
    • Vars
      • K(d);OGATEB,P_SPINP(c),S_FLIGHT,XS(C)::B(A)
      • R(e);SBLOCK,XP(F)::S(C)
      • R(e);N_GUARD::QAB1(H),XR(e)
      • S(f);N_GUARD::QAB1(H)
      • R(e);N_GUARD,P_PINB(A)::QAB1(H)
      • R(e);N_GUARD::QAB1(H)
      • S(f);N_GUARD::QAB1(H),XS(f)
      • P(a);::QAB1(H)
      • P(c);::QAR1(H)
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