MESON Chess Problem Database

Problem Display
PID: 194773 (5BQn/7p/4BK1p/1P3p1P/3kbR2/1nN4R/q3p3/rr6 w - - 0 1)

Knott, Hubert Edward

Western Daily Mercury, 1917

(First published on Fri Apr 20 1917)

5BQn/7p/4BK1p/1P3p1P/3kbR2/1nN4R/q3p3/rr6

#2

9 + 11

15239 Valois Notebooks 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qa3
      • 2.Sxe2#
    • 1...Qa4
      • 2.Sxe2#
    • 1...Qa5
      • 2.Sxe2#
    • 1...Qa6
      • 2.Sxe2#
    • 1...Qa7
      • 2.Sxe2#
    • 1...Qa8
      • 2.Sxe2#
    • 1...Sc1
      • 2.Qg1#
    • 1...Sd2
      • 2.Sxe2#
  • Tries
    • 1.Qg3?
      • threat
        • 2.Qf2#
        • 2.Qd3#
        • 2.Qe3#
      • 1...e1Q
        • 2.Qd3#
      • 1...e1S
        • 2.Qe3#
      • 1...e1B
        • 2.Qd3#
        • 2.Qe3#
      • 1...e1R
        • 2.Qd3#
      • 1...Qc2
        • 2.Qf2#
        • 2.Qe3#
      • 1...Rd1
        • 2.Qf2#
        • 2.Qe3#
      • 1...Rf1
        • 2.Qd3#
        • 2.Qe3#
      • 1...Sc1
        • 2.Qf2#
        • 2.Qg1#
        • 2.Qe3#
      • 1...Sc5
        • 2.Qf2#
        • 2.Qe3#
      • 1...Qd2!
    • 1.Qxh8?
      • threat
        • 2.Kf7#
      • 1...Qa7
        • 2.Sxe2#
      • 1...Rg1!
  • Keys
    • 1.Qg7!
      • threat
        • 2.Qd7#
      • 1...Qa3
        • 2.Sxe2#
      • 1...Qa6
        • 2.Sxe2#
      • 1...Qa7
        • 2.Sxe2#
      • 1...Qa8
        • 2.Sxe2#
      • 1...Sc1
        • 2.Qg1#
      • 1...Sd2
        • 2.Sxe2#
      • 1...Sa5
        • 2.Qa7#
      • 1...Sc5
        • 2.Ke7#
      • 1...Sf7
        • 2.Kxf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • Q(c);N_GUARD::S(A),XP(d)
    • Q(c);N_GUARD,P_PINB(F)::S(A),XP(d)
    • S(e);S_CUTR(b)::QAB(I)
    • S(e);S_CUTQ(c)::S(A),XP(d)
  • Tries
    • Try
      • Q(I);
      • Threat
        • DUALS(3)
      • Vars
        • P(d);::QAR1(I)
        • P(d);::QAB1(I)
      • Refutation
        • Q(c);
    • Try
      • Q(I);XS(k)
      • Threat
        • QAB(I)+K(G)
      • Vars
        • Q(c);N_GUARD::S(A),XP(d)
      • Refutation
        • R(b);
  • Actual
    • Q(I);
    • Threat
      • QAR(I)
    • Vars
      • Q(c);N_GUARD::S(A),XP(d)
      • Q(c);N_GUARD,P_PINB(F)::S(A),XP(d)
      • S(e);S_CUTR(b)::QAB(I)
      • S(e);S_CUTQ(c)::S(A),XP(d)
      • S(e);N_GUARD,S_CUTQ(c)::QAB(I)
      • S(e);SBLOCK::QAB(I)+K(G)
      • S(k);::QAB(I)+K(G),XS(k)
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