MESON Chess Problem Database

Problem Display
PID: 106781 (Q7/4N3/2KnpnB1/2p1k1P1/2r1p1r1/4R3/4NP2/8 w - - 0 1)

Luke, R

The Field, 1955

(First published on Thu Jun 2 1955)

Q7/4N3/2KnpnB1/2p1k1P1/2r1p1r1/4R3/4NP2/8

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rg1
      • 2.f4#
    • 1...Rg2
      • 2.f4#
    • 1...Rg3
      • 2.f4#
    • 1...Rxg5
      • 2.f4#
  • Tries
    • 1.Qa1+?
      • 1...Rc3
        • 2.Qxc3#
      • 1...Rd4!
  • Keys
    • 1.Bxe4!
      • threat
        • 2.Sg6#
      • 1...Rcxe4
        • 2.Qa1#
      • 1...Rgxe4
        • 2.f4#
      • 1...Rxg5
        • 2.f4#
      • 1...Sdxe4
        • 2.Qb8#
      • 1...Sfxe4
        • 2.Qh8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • R(c);N_GUARD::P(B)
    • R(c);N_GUARD,XP(D)::P(B)
  • Tries
    • Try
      • Q(H);CHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::QAB(H),XR(a)
      • Refutation
        • R(a);P_SPINR(a)
  • Actual
    • B(F);XP(b)
    • Threat
      • S(G)
    • Vars
      • R(a);N_GUARD,P_SPINR(a),XB(F)::QAB(H)
      • R(c);N_GUARD,P_SPINR(c),XB(F)::P(B)
      • R(c);N_GUARD,XP(D)::P(B)
      • S(f);OGATEB,P_SPINS(f),XB(F)::QAB(H)
      • S(h);OGATEB,P_SPINS(h),XB(F)::QAB(H)
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