MESON Chess Problem Database

Problem Display
PID: 142161 (8/1pn4K/qprP4/1N3Q2/1Pk1P3/8/1R2N2p/1B4nr w - - 0 1)

Lane, Henry Fitzgerald William

Meson, 2011

8/1pn4K/qprP4/1N3Q2/1Pk1P3/8/1R2N2p/1B4nr

#2

9 + 9

14867 BCPS Library 2011
133 The Problemist Supplement 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Qa3
      • 2.Sxa3#
    • 1...Rxd6
      • 2.Sxd6#
    • 1...Sxb5
      • 2.Qe6#
      • 2.Qd5#
      • 2.Qf7#
    • 1...Sd5
      • 2.Qxd5#
    • 1...Se6
      • 2.Qd5#
    • 1...Sa8
      • 2.Qd5#
    • 1...Se8
      • 2.Qd5#
  • Keys
    • 1.Qf1!
      • threat
        • 2.Sxg1#
      • 1...Kxb5
        • 2.Sc3#
      • 1...Qxb5
        • 2.Qc1#
      • 1...Rxd6
        • 2.Sxd6#
      • 1...Sxe2
        • 2.Qxe2#
      • 1...Sxb5
        • 2.Qf7#
      • 1...Qa3
        • 2.Sxa3#
      • 1...Sf3
        • 2.Sg1#
      • 1...Sh3
        • 2.Sg1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 4
  • Sets
    • Q(e);N_GUARD::S(F),XQ(e)
    • R(g);XP(H)::S(F),XR(g)
    • S(i);N_GUARD::QAB1(G),XS(i)
    • S(i);N_GUARD::QAB1(G)
  • Actual
    • Q(G);
    • Threat
      • QAB(G)+S(C),XS(a)
    • Vars
      • K(d);S_FLIGHT,XS(F)::QAB(G)+S(C),DCHECK
      • Q(e);SBLOCK,XS(F)::QAR(G)
      • R(g);XP(H)::S(F),XR(g)
      • S(a);OGATE,P_SPINS(a),XS(C)::QAB(G),XS(a)
      • S(i);N_GUARD,SBLOCK,XS(F)::QAB(G)
      • Q(e);N_GUARD::S(F),XQ(e)
      • S(a);::QAB(G)+S(C)
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