MESON Chess Problem Database

Problem Display
PID: 18692 (1B6/2N5/1p2P3/1P2nB2/R1Pk4/1K1Np3/1n1R4/6Qb w - - 0 1)

Grinblat, Arieh

Retter, Yosef

1st Prize, Schach, 1957

1B6/2N5/1p2P3/1P2nB2/R1Pk4/1K1Np3/1n1R4/6Qb

#2

11 + 6

3841 The Art of Israeli Chess Composition 1983

SOLUTION

  • SOUND
  • Sets
    • 1...Sbxc4
      • 2.Qa1#
    • 1...Sf3
      • 2.Qg4#
    • 1...Sexc4
      • 2.Qg7#
  • Tries
    • 1.Sxb2+?
      • 1...Kc5
        • 2.Sa6#
        • 2.Qxe3#
      • 1...Sd3!
    • 1.Qa1?
      • threat
        • 2.Qxb2#
      • 1...exd2
        • 2.Qg1#
      • 1...e2
        • 2.Qg1#
      • 1...Sxd3!
    • 1.Qxh1?
      • threat
        • 2.Qe4#
        • 2.Qd5#
      • 1...Sbxd3
        • 2.Qd5#
      • 1...Sexd3
        • 2.Qd5#
      • 1...exd2
        • 2.Qe4#
        • 2.Qg1#
      • 1...e2
        • 2.Qe4#
        • 2.Qg1#
      • 1...Sf3!
    • 1.Qg4+?
      • 1...Be4
        • 2.Qxe4#
      • 1...Sxg4!
    • 1.c5+?
      • 1...Sbc4
        • 2.Qa1#
      • 1...Sec4
        • 2.Qg7#
      • 1...Sxa4!
    • 1.e7?
      • threat
        • 2.Se6#
      • 1...Sbxc4
        • 2.Qa1#
      • 1...Sexc4
        • 2.Qg7#
      • 1...Bd5!
  • Keys
    • 1.Sa6!
      • threat
        • 2.Bxe5#
      • 1...Sbxd3
        • 2.Qa1#
      • 1...Sbxc4
        • 2.Sxe5#
      • 1...Sexd3
        • 2.Qg7#
      • 1...Sexc4
        • 2.Sxb2#
      • 1...Sf3
        • 2.Qg4#
      • 1...Sg4
        • 2.Sxb2#
      • 1...Sc6
        • 2.Sxb2#
      • 1...Sg6
        • 2.Sxb2#
      • 1...Sd7
        • 2.Sxb2#
      • 1...Sf7
        • 2.Sxb2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • S(b);OGATEB,P_SPINS(b),XP(F)::QAB(A)
    • S(e);N_GUARD,S_CUTB(a)::QAR(A)
    • S(e);OGATEB,P_SPINS(e),XP(F)::QAB(A)
  • Tries
    • Try
      • S(D);CHECK,XS(b)
      • Refutation
        • S(e);P_SPINS(e)
    • Try
      • Q(A);N_PINP(c),P_PINS(b)
      • Threat
        • QAB(A),XS(b)
      • Vars
        • P(c);OGATEB,XR(B)::QAB(A)
        • P(c);OGATEB::QAB(A)
      • Refutation
        • S(e);XS(D)
    • Try
      • Q(A);N_PINP(c),XB(a)
      • Threat
        • DUALS(2)
      • Vars
        • S(b);P_SPINS(b),XS(D)::QAR1(A)
        • S(e);P_SPINS(e),XS(D)::QAR1(A)
      • Refutation
        • S(e);
    • Try
      • Q(A);CHECK,N_PINP(c)
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAR1(A),XB(a)
      • Refutation
        • S(e);XQ(A)
    • Try
      • P(F);CHECK
      • Vars
        • S(b);P_SPINS(b),S_CUTS(e)::QAB(A)
        • S(e);P_SPINS(e),S_CUTS(b),S_CUTS(b)::QAB(A)
      • Refutation
        • S(b);XR(E)
    • Try
      • P(I);
      • Threat
        • S(J)
      • Vars
        • S(b);OGATEB,P_SPINS(b),XP(F)::QAB(A)
        • S(e);OGATEB,P_SPINS(e),XP(F)::QAB(A)
      • Refutation
        • B(a);P_PINP(F)
  • Actual
    • S(J);
    • Threat
      • B(K),XS(e)
    • Vars
      • S(b);OGATEB,P_SPINS(b),XS(D)::QAB(A)
      • S(b);N_GUARD,P_SPINS(b),XP(F)::R(B)+S(D),XS(e)
      • S(e);OGATEB,P_SPINS(e),XS(D)::QAB(A)
      • S(e);N_GUARD,P_SPINS(e),XP(F)::R(B)+S(D),XS(b)
      • S(e);N_GUARD,S_CUTB(a)::QAR(A)
      • S(e);N_GUARD::R(B)+S(D),XS(b)
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