MESON Chess Problem Database

Problem Display
PID: 134030 (R1Q5/K2pr3/RN2k2n/1N3p1B/5pp1/2B2b2/6q1/8 w - - 0 1)

Galbraith, CA

The Field, 1964

(First published on Thu Aug 6 1964)

R1Q5/K2pr3/RN2k2n/1N3p1B/5pp1/2B2b2/6q1/8

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Re8
      • 2.Qxd7#
      • 2.Qxe8#
  • Tries
    • 1.Sc4+?
      • 1...Bc6
        • 2.Sc7#
      • 1...Kd5!
    • 1.Sxd7+?
      • 1...Kd5
        • 2.Qc6#
      • 1...Bc6!
    • 1.Qg8+?
      • 1...Rf7
        • 2.Re8#
      • 1...Sf7
        • 2.Qg6#
      • 1...Sxg8!
  • Keys
    • 1.Qe8!
      • threat
        • 2.Qg6#
      • 1...d5+
        • 2.Sd7#
      • 1...d6+
        • 2.Sc7#
      • 1...Rxe8
        • 2.Rxe8#
      • 1...Sf7
        • 2.Bxf7#
      • 1...Sg8
        • 2.Bf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • B(b);P_SPINB(b)::S(B)
      • Refutation
        • K(f);N_SPINP(h),S_FLIGHT
    • Try
      • S(E);CHECK,P_SPINS(E),XP(h)
      • Vars
        • K(f);S_FLIGHT::QAB1(H)
      • Refutation
        • B(b);P_SPINB(b)
    • Try
      • Q(H);CHECK,N_PINP(h)
      • Vars
        • R(i);P_SPINR(i),S_CUTS(g),S_CUTS(g)::R(G)
        • S(g);P_SPINS(g)::QAR2(H)
      • Refutation
        • S(g);XQ(H)
  • Actual
    • Q(H);N_PINP(h),P_PINR(i)
    • Threat
      • QAR2(H)
    • Vars
      • P(h);CHECK,SBLOCK,S_CUTB(b)::R(D)+S(E)
      • P(h);CHECK,SBLOCK::S(B)
      • R(i);N_SPINR(i),OGATE,XQ(H)::R(G),XR(i)
      • S(g);N_GUARD::B(C),XS(g)
      • S(g);N_GUARD::B(C)
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