MESON Chess Problem Database

Problem Display
PID: 188374 (6Q1/2PrPN1B/3p2KP/R1nN1P1R/2b1k1p1/2P1p3/2P3P1/8 w - - 0 1)

Reeves, Alfred Christopher

1st HM., British Chess Magazine, 1977

6Q1/2PrPN1B/3p2KP/R1nN1P1R/2b1k1p1/2P1p3/2P3P1/8

#2

14 + 7

56 The Problemist 1980

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd5
      • 2.Qa8#
  • Tries
    • 1.Kg5?
      • threat
        • 2.Sf6#
      • 1...Se6+
        • 2.fxe6#
      • 1...Kxd5
        • 2.Qa8#
      • 1...Bxd5
        • 2.f6#
      • 1...e2!
    • 1.Kg7?
      • threat
        • 2.f6#
      • 1...Se6+
        • 2.fxe6#
      • 1...Kxd5
        • 2.Qa8#
      • 1...Bxd5!
    • 1.Qh8?
      • threat
        • 2.Qd4#
      • 1...Kxd5
        • 2.Qa8#
      • 1...Sb3
        • 2.Sg5#
      • 1...Se6!
    • 1.f6?
      • threat
        • 2.Kg7#
      • 1...Bxd5
        • 2.Kg5#
      • 1...Se6!
    • 1.e8Q+?
      • 1...Kxd5
        • 2.Qa8#
      • 1...Se6
        • 2.Qxe6#
      • 1...Re7!
  • Keys
    • 1.Kf6!
      • threat
        • 2.Sg5#
      • 1...Kxd5
        • 2.Qa8#
      • 1...Bxd5
        • 2.Qxg4#
      • 1...Se6
        • 2.fxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(c);OGATEB,P_SPINS(e),S_FLIGHT,XS(E)::QAB(N)
  • Tries
    • Try
      • K(H);P-FLIGHT
      • Threat
        • S(E)
      • Vars
        • S(e);CHECK,OGATE::B(M)+P(F),XS(e)
        • K(c);OGATEB,P_SPINS(e),S_FLIGHT,XS(E)::QAB(N)
        • B(b);SBLOCK,XS(E)::B(M)+P(F)
      • Refutation
        • P(a);
    • Try
      • K(H);P-FLIGHT
      • Threat
        • B(M)+P(F)
      • Vars
        • S(e);CHECK,OGATE::B(M)+P(F),XS(e)
        • K(c);OGATEB,P_SPINS(e),S_FLIGHT,XS(E)::QAB(N)
      • Refutation
        • B(b);XS(E)
    • Try
      • Q(N);
      • Threat
        • QAR1(N)
      • Vars
        • K(c);OGATEB,P_SPINS(e),S_FLIGHT,XS(E)::QAB(N)
        • S(e);::S(L)
      • Refutation
        • S(e);
    • Try
      • P(F);
      • Threat
        • B(M)+K(H)
      • Vars
        • B(b);SBLOCK,XS(E)::B(M)+K(H)
      • Refutation
        • S(e);
    • Try
      • P(K);CHECK
      • Vars
        • K(c);OGATEB,P_SPINS(e),S_FLIGHT,XS(E)::QAB(K)
        • S(e);N_GUARD,P_SPINS(e)::QAR2(K),XS(e)
      • Refutation
        • R(g);P_SPINR(g)
  • Actual
    • K(H);P-FLIGHT
    • Threat
      • S(L)
    • Vars
      • K(c);OGATEB,P_SPINS(e),S_FLIGHT,XS(E)::QAB(N)
      • B(b);SBLOCK,XS(E)::QAR2(N),XP(d)
      • S(e);OGATE::B(M)+P(F),XS(e)
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