MESON Chess Problem Database

Problem Display
PID: 272749 (2N5/3q4/1p1r4/n2p4/p1kPp1P1/4K3/PQ2n3/B7 w - - 0 1)

Stallybrass, Don HR

The Problemist, 1957

2N5/3q4/1p1r4/n2p4/p1kPp1P1/4K3/PQ2n3/B7

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qxg4
      • 2.Sxd6#
    • 1...Qb5
      • 2.Sxd6#
    • 1...Qf5
      • 2.Sxd6#
    • 1...Qe8
      • 2.Sxd6#
    • 1...Qa7
      • 2.Sxd6#
    • 1...Qb7
      • 2.Sxd6#
    • 1...Qf7
      • 2.Sxd6#
    • 1...Qg7
      • 2.Sxd6#
    • 1...Qh7
      • 2.Sxd6#
    • 1...Sc6
      • 2.Sxb6#
  • Keys
    • 1.a3!
      • threat
        • 2.Qb4#
      • 1...Sb3
        • 2.Qxe2#
      • 1...Qb5
        • 2.Sxd6#
      • 1...Sc6
        • 2.Sxb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 8
  • Sets
    • Q(i);N_GUARD,XP(F)::S(G),XR(h)
    • Q(i);N_GUARD::S(G),XR(h)
    • S(e);S_CUTR(h)::S(G),XP(g)
  • Actual
    • P(B);
    • Threat
      • QAR1(C)
    • Vars
      • S(e);SBLOCK::QAB(C),XS(a)
      • Q(i);N_GUARD::S(G),XR(h)
      • S(e);S_CUTR(h)::S(G),XP(g)
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