MESON Chess Problem Database

Problem Display
PID: 133647 (8/B7/5N2/3P4/2pqr3/p1kpP1Q1/KR4R1/n4B2 w - - 0 1)

Russell Johnson, Rev P

The Field, 1961

8/B7/5N2/3P4/2pqr3/p1kpP1Q1/KR4R1/n4B2

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qc5
      • 2.Sxe4#
    • 1...Qb6
      • 2.Sxe4#
    • 1...Qxa7
      • 2.Sxe4#
    • 1...Qxd5
      • 2.Sxd5#
    • 1...Re5
      • 2.Bxd4#
    • 1...Re6
      • 2.Bxd4#
    • 1...Re7
      • 2.Bxd4#
    • 1...Re8
      • 2.Bxd4#
  • Keys
    • 1.Qc7!
      • threat
        • 2.Qa5#
      • 1...Qxa7
        • 2.Sxe4#
      • 1...Qxd5
        • 2.Sxd5#
      • 1...Sb3
        • 2.Rxb3#
      • 1...Qc5
        • 2.Sxe4#
      • 1...Qb6
        • 2.Sxe4#
      • 1...Sc2
        • 2.Rb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • Q(f);N_GUARD::S(H),XR(g)
    • Q(f);N_GUARD,XB(I)::S(H),XR(g)
    • Q(f);XP(G)::S(H),XQ(f)
    • R(g);N_GUARD::B(I),XQ(f)
  • Actual
    • Q(F);P_PINP(e)
    • Threat
      • QAB(F)
    • Vars
      • Q(f);N_GUARD,XB(I)::S(H),XR(g)
      • Q(f);XP(G)::S(H),XQ(f)
      • S(a);N_GUARD::R1(C),XS(a)
      • Q(f);N_GUARD,N_SPINP(e)::S(H),XR(g)
      • Q(f);N_GUARD::S(H),XR(g)
      • S(a);N_GUARD::R1(C)
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