MESON Chess Problem Database

Problem Display
PID: 136226 (b5Q1/2bRpKP1/3N1P1p/1P1kPnR1/1P6/3Pprr1/4N1B1/q7 w - - 0 1)

Barnes, Barry Peter

Comm., BCF 101. Ty., 1962-1963

b5Q1/2bRpKP1/3N1P1p/1P1kPnR1/1P6/3Pprr1/4N1B1/q7

#2

13 + 10

3713 Snap 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe5
      • 2.Sc4#
    • 1...Qxe5
      • 2.Qxa8#
    • 1...Sd4
      • 2.Sf4#
    • 1...Sh4
      • 2.Kxe7#
    • 1...Sxd6+
      • 2.Kxe7#
    • 1...exf6
      • 2.Kxf6#
  • Tries
    • 1.Kg6+?
      • 1...Kxe5
        • 2.Sc4#
      • 1...e6!
    • 1.Sc4+?
      • 1...Sd6+
        • 2.Kxe7#
      • 1...Bd6!
    • 1.Sxf5+?
      • 1...Bd6
        • 2.Sxe3#
        • 2.Sxe7#
      • 1...Kxe5!
    • 1.Bxf3+?
      • 1...Kxe5
        • 2.Sc4#
        • 2.Rxf5#
      • 1...Rxf3!
    • 1.Qxa8+?
      • 1...Kxe5
        • 2.Sc4#
        • 2.Qe4#
      • 1...Qxa8!
  • Keys
    • 1.fxe7!
      • threat
        • 2.Kf6#
      • 1...Sd4+
        • 2.Sf4#
      • 1...Sh4+
        • 2.Ke8#
      • 1...Sxd6+
        • 2.Kg6#
      • 1...Sxe7+
        • 2.Kxe7#
      • 1...Sxg7+
        • 2.Kxg7#
      • 1...Kxe5
        • 2.Sc4#
      • 1...Qxe5
        • 2.Qxa8#

Anticipated by 16447(1940/II)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(e);N_SPINR(c),P-FLIGHT,P_SPINS(f),XP(F)::S(H)
    • Q(a);N_GUARD,SBLOCK,XP(F)::QAB(M),XB(j)
    • S(f);P_PINP(I),SBLOCK::S(A)
    • S(f);P_PINP(I)::QAB(M)+K(K),XP(i)
    • S(f);CHECK,P_PINP(I),P_SPINS(f),XS(H)::QAB(M)+K(K),XP(i)
    • P(i);XP(I)::QAB(M)+K(K),XP(i)
  • Tries
    • Try
      • K(K);CHECK,P_SPINR(G),S_FLIGHT
      • Vars
        • K(e);N_SPINR(c),P-FLIGHT,P_SPINS(f),XP(F)::S(H)
      • Refutation
        • P(i);P_SPINP(i)
    • Try
      • S(H);CHECK
      • Vars
        • S(f);CHECK,P_PINP(I),P_SPINS(f)::QAB(M)+K(K),XP(i)
      • Refutation
        • B(h);P_SPINB(h)
    • Try
      • S(H);CHECK,XS(f)
      • Refutation
        • K(e);N_SPINR(c),P-FLIGHT,XP(F)
    • Try
      • B(B);CHECK,XR(c)
      • Refutation
        • R(d);XB(B)
    • Try
      • Q(M);CHECK,XB(j)
      • Refutation
        • Q(a);XQ(M)
  • Actual
    • P(I);XP(i)
    • Threat
      • QAB(M)+K(K)
    • Vars
      • S(f);CHECK,SBLOCK::S(A)
      • S(f);CHECK::QAB(M)+K(K)
      • S(f);CHECK,P_SPINS(f),XS(H)::QAB(M)+K(K)
      • S(f);CHECK,XP(I)::QAB(M)+K(K),XS(f)
      • S(f);CHECK,XP(L)::QAB(M)+K(K),XS(f)
      • K(e);N_SPINR(c),P-FLIGHT,P_SPINS(f),XP(F)::S(H)
      • Q(a);N_GUARD,SBLOCK,XP(F)::QAB(M),XB(j)
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